In this paper there are consider the automatic adaptive control system, selected adaptive control system with the standard model.The mathematical model of adaptive control system with the etalon-model is developed. Constructed and researched mathematical model of adaptive system with a reference model using MathLab Simulink software.There are researched adaptive control system responds to various external influences.
Design of a Controller for Systems with Simultaneously Variable Parametersijtsrd
The contribution of this paper is in suggesting an analysis and design of a control system with variable parameters By applying the recommended by the author method of the Advanced D-partitioning the system's stability can be analyzed in details The method defines regions of stability in the space of the system's parameters The designed controller is enforcing desired system performance The suggested technique for analysis and design is essential and beneficial for the further development of control theory in this area Prof. Kamen Yanev "Design of a Controller for Systems with Simultaneously Variable Parameters" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18440.pdf
Coal-Fired Boiler Fault Prediction using Artificial Neural Networks IJECEIAES
Boiler fault is a critical issue in a coal-fired power plant due to its high temperature and high pressure characteristics. The complexity of boiler design increases the difficulty of fault investigation in a quick moment to avoid long duration shut-down. In this paper, a boiler fault prediction model is proposed using artificial neural network. The key influential parameters analysis is carried out to identify its correlation with the performance of the boiler. The prediction model is developed to achieve the least misclassification rate and mean squared error. Artificial neural network is trained using a set of boiler operational parameters. Subsequenlty, the trained model is used to validate its prediction accuracy against actual fault value from a collected real plant data. With reference to the study and test results, two set of initial weights have been tested to verify the repeatability of the correct prediction. The results show that the artificial neural network implemented is able to provide an average of above 92% prediction rate of accuracy.
Design of a Controller for Systems with Simultaneously Variable Parametersijtsrd
The contribution of this paper is in suggesting an analysis and design of a control system with variable parameters By applying the recommended by the author method of the Advanced D-partitioning the system's stability can be analyzed in details The method defines regions of stability in the space of the system's parameters The designed controller is enforcing desired system performance The suggested technique for analysis and design is essential and beneficial for the further development of control theory in this area Prof. Kamen Yanev "Design of a Controller for Systems with Simultaneously Variable Parameters" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18440.pdf
Coal-Fired Boiler Fault Prediction using Artificial Neural Networks IJECEIAES
Boiler fault is a critical issue in a coal-fired power plant due to its high temperature and high pressure characteristics. The complexity of boiler design increases the difficulty of fault investigation in a quick moment to avoid long duration shut-down. In this paper, a boiler fault prediction model is proposed using artificial neural network. The key influential parameters analysis is carried out to identify its correlation with the performance of the boiler. The prediction model is developed to achieve the least misclassification rate and mean squared error. Artificial neural network is trained using a set of boiler operational parameters. Subsequenlty, the trained model is used to validate its prediction accuracy against actual fault value from a collected real plant data. With reference to the study and test results, two set of initial weights have been tested to verify the repeatability of the correct prediction. The results show that the artificial neural network implemented is able to provide an average of above 92% prediction rate of accuracy.
A novel auto-tuning method for fractional order PID controllersISA Interchange
Fractional order PID controllers benefit from an increasing amount of interest from the research community due to their proven advantages. The classical tuning approach for these controllers is based on specifying a certain gain crossover frequency, a phase margin and a robustness to gain variations. To tune the fractional order controllers, the modulus, phase and phase slope of the process at the imposed gain crossover frequency are required. Usually these values are obtained from a mathematical model of the process, e.g. a transfer function. In the absence of such model, an auto-tuning method that is able to estimate these values is a valuable alternative. Auto-tuning methods are among the least discussed design methods for fractional order PID controllers. This paper proposes a novel approach for the auto-tuning of fractional order controllers. The method is based on a simple experiment that is able to determine the modulus, phase and phase slope of the process required in the computation of the controller parameters. The proposed design technique is simple and efficient in ensuring the robustness of the closed loop system. Several simulation examples are presented, including the control of processes exhibiting integer and fractional order dynamics.
This slide show contains a detailed explanation of the following topics from Control System:
1. Open loop & Closed loop
2. Mathematical modeling
3. f-v and f-i analogy
4. Block diagram reduction technique
5. Signal flow graph
Comparative Study on the Performance of A Coherency-based Simple Dynamic Equi...IJAPEJOURNAL
Earlier, a simple dynamic equivalent for a power system external area containing a group of coherent generators was proposed in the literature. This equivalent is based on a new concept of decomposition of generators and a two-level generator aggregation. With the knowledge of only the passive network model of the external area and the total inertia constant of all the generators in this area, the parameters of this equivalent are determinable from a set of measurement data taken solely at a set of boundary buses which separates this area from the rest of the system. The proposed equivalent, therefore, does not require any measurement data at the external area generators. This is an important feature of this equivalent. In this paper, the results of a comparative study on the performance of this dynamic equivalent aggregation with the new inertial aggregation in terms of accuracy are presented. The three test systems that were considered in this comparative investigation are the New England 39-bus 10-generator system, the IEEE 162-bus 17-generator system and the IEEE 145-bus 50-generator system.
A MODIFIED ANT COLONY ALGORITHM FOR SOLVING THE UNIT COMMITMENT PROBLEMaeijjournal
Solving the unit commitment (UC) problem is one of the most complicated issues in power systems that its
exact solving can be calculated by perfect counting of entire possible compounds of generative units. UC is
equated as a nonlinear optimization with huge size. Purpose of solving this problem is to programming the
optimization of the generative units to minimize the full action cost regarding problem constraints. In this
article, a modified version of ant colony optimization (MACO) is introduced for solving the UC problem in
a power system. ACO algorithm is a powerful optimization method which has the capability of fleeing from
local minimums by performing flexible memory system. The efficiency of proposed method in two power
system containing 4 and 10 generative units is indicated. Comparison of obtained results from the proposed
method with results of the past well-known methods is a proof for suitability of performing the introduced
algorithm in economic input and output of generative units.
Parameter selection in a combined cycle power plantModelon
Authors:
- Niklas Andersson, Dept. of Chemical Engineering, Lund University
- Johan Åkesson, Modelon AB
- KilianLink, Siemens AG
- Stephanie Gallardo Yances, Siemens AG
- Karin Dietl, Siemens AG
- Bernt Nilsson, Dept. of Chemical Engineering, Lund University
A combined cycle power plant is modeled and considered for calibration. The dynamic model, aimed for start-up optimization, contains 64 candidate parameters for calibration. The number of parameter sets that can be created are huge and an algorithm called subset selection algorithm is used to reduce the number of parameter sets.
The algorithm investigates the numerical properties of a calibration from a parameter Jacobean estimated from a simulation of the model with reasonably chosen parameter values. The calibrations were performed with a Levenberg-Marquardt algorithm considering the least squares of eight output signals.
The parameter value with the best objective function value resulted in simulations in good compliance to the process dynamics. The subset selection algorithm effectively shows which parameters that are important and which parameters that can be left out.
Full text at: https://www.modelica.org/events/modelica2014/proceedings/html/submissions/ECP14096809_AnderssonAkessonLinkGallardoyancesDietlNilsson.pdf
http://www.modelon.com/news/news-display/artikel/modelica-conference/
Dynamic Matrix Control (DMC) on jacket tank heater - Rishikesh BagweRishikesh Bagwe
The Dynamic Matrix Control (DMC) method of Model Predictive Control was simulated in MATLAB on Jacketed Tank Heater. The characteristics of the liquid being controlled are height and temperature
Current predictive controller for high frequency resonant inverter in inducti...IJECEIAES
In the context of this article, we are particularly interested in the modeling and control of an induction heating system powered by high frequency resonance inverter. The proposed control scheme comprises a current loop and a PLL circuit. This latter is an electronic assembly for slaving the instantaneous phase of output on the instantaneous input phase, and is used to follow the rapid variations of the frequency.To further improve the transient dynamics of the studied system and in order to reduce the impact of measurement noise on the control signal, a generalized predictive control has been proposed to control the current of the inductor. We discussed the main steps of this command, whose it uses a minimization algorithm to obtain an optimal control signals, its advantages are: its design is simple, less complexity and direct manipulation of the control signal. The results have shown the effectiveness of the proposed method, especially in the parameters variation and/or the change of the reference current.
A novel auto-tuning method for fractional order PID controllersISA Interchange
Fractional order PID controllers benefit from an increasing amount of interest from the research community due to their proven advantages. The classical tuning approach for these controllers is based on specifying a certain gain crossover frequency, a phase margin and a robustness to gain variations. To tune the fractional order controllers, the modulus, phase and phase slope of the process at the imposed gain crossover frequency are required. Usually these values are obtained from a mathematical model of the process, e.g. a transfer function. In the absence of such model, an auto-tuning method that is able to estimate these values is a valuable alternative. Auto-tuning methods are among the least discussed design methods for fractional order PID controllers. This paper proposes a novel approach for the auto-tuning of fractional order controllers. The method is based on a simple experiment that is able to determine the modulus, phase and phase slope of the process required in the computation of the controller parameters. The proposed design technique is simple and efficient in ensuring the robustness of the closed loop system. Several simulation examples are presented, including the control of processes exhibiting integer and fractional order dynamics.
This slide show contains a detailed explanation of the following topics from Control System:
1. Open loop & Closed loop
2. Mathematical modeling
3. f-v and f-i analogy
4. Block diagram reduction technique
5. Signal flow graph
Comparative Study on the Performance of A Coherency-based Simple Dynamic Equi...IJAPEJOURNAL
Earlier, a simple dynamic equivalent for a power system external area containing a group of coherent generators was proposed in the literature. This equivalent is based on a new concept of decomposition of generators and a two-level generator aggregation. With the knowledge of only the passive network model of the external area and the total inertia constant of all the generators in this area, the parameters of this equivalent are determinable from a set of measurement data taken solely at a set of boundary buses which separates this area from the rest of the system. The proposed equivalent, therefore, does not require any measurement data at the external area generators. This is an important feature of this equivalent. In this paper, the results of a comparative study on the performance of this dynamic equivalent aggregation with the new inertial aggregation in terms of accuracy are presented. The three test systems that were considered in this comparative investigation are the New England 39-bus 10-generator system, the IEEE 162-bus 17-generator system and the IEEE 145-bus 50-generator system.
A MODIFIED ANT COLONY ALGORITHM FOR SOLVING THE UNIT COMMITMENT PROBLEMaeijjournal
Solving the unit commitment (UC) problem is one of the most complicated issues in power systems that its
exact solving can be calculated by perfect counting of entire possible compounds of generative units. UC is
equated as a nonlinear optimization with huge size. Purpose of solving this problem is to programming the
optimization of the generative units to minimize the full action cost regarding problem constraints. In this
article, a modified version of ant colony optimization (MACO) is introduced for solving the UC problem in
a power system. ACO algorithm is a powerful optimization method which has the capability of fleeing from
local minimums by performing flexible memory system. The efficiency of proposed method in two power
system containing 4 and 10 generative units is indicated. Comparison of obtained results from the proposed
method with results of the past well-known methods is a proof for suitability of performing the introduced
algorithm in economic input and output of generative units.
Parameter selection in a combined cycle power plantModelon
Authors:
- Niklas Andersson, Dept. of Chemical Engineering, Lund University
- Johan Åkesson, Modelon AB
- KilianLink, Siemens AG
- Stephanie Gallardo Yances, Siemens AG
- Karin Dietl, Siemens AG
- Bernt Nilsson, Dept. of Chemical Engineering, Lund University
A combined cycle power plant is modeled and considered for calibration. The dynamic model, aimed for start-up optimization, contains 64 candidate parameters for calibration. The number of parameter sets that can be created are huge and an algorithm called subset selection algorithm is used to reduce the number of parameter sets.
The algorithm investigates the numerical properties of a calibration from a parameter Jacobean estimated from a simulation of the model with reasonably chosen parameter values. The calibrations were performed with a Levenberg-Marquardt algorithm considering the least squares of eight output signals.
The parameter value with the best objective function value resulted in simulations in good compliance to the process dynamics. The subset selection algorithm effectively shows which parameters that are important and which parameters that can be left out.
Full text at: https://www.modelica.org/events/modelica2014/proceedings/html/submissions/ECP14096809_AnderssonAkessonLinkGallardoyancesDietlNilsson.pdf
http://www.modelon.com/news/news-display/artikel/modelica-conference/
Dynamic Matrix Control (DMC) on jacket tank heater - Rishikesh BagweRishikesh Bagwe
The Dynamic Matrix Control (DMC) method of Model Predictive Control was simulated in MATLAB on Jacketed Tank Heater. The characteristics of the liquid being controlled are height and temperature
Current predictive controller for high frequency resonant inverter in inducti...IJECEIAES
In the context of this article, we are particularly interested in the modeling and control of an induction heating system powered by high frequency resonance inverter. The proposed control scheme comprises a current loop and a PLL circuit. This latter is an electronic assembly for slaving the instantaneous phase of output on the instantaneous input phase, and is used to follow the rapid variations of the frequency.To further improve the transient dynamics of the studied system and in order to reduce the impact of measurement noise on the control signal, a generalized predictive control has been proposed to control the current of the inductor. We discussed the main steps of this command, whose it uses a minimization algorithm to obtain an optimal control signals, its advantages are: its design is simple, less complexity and direct manipulation of the control signal. The results have shown the effectiveness of the proposed method, especially in the parameters variation and/or the change of the reference current.
Prospects of Tar Sand in Nigeria Energy Mixtheijes
In ancient times, the Elamites, Chaldeans, Akkadians, and Sumerians mined shallow deposits of asphalt, or bitumen occurring in tar sand for their own use. Mesopotamian bitumen was exported to Egypt where it was employed for various purposes, including the preservation of mummies. Tar sand had many other uses in the ancient world. It was mixed with sand and fibrous materials for use in the construction of watercourses and levees and as mortar for bricks. In Nigeria, development of heavy oil and bitumen in Tar sand reserves is increasing around the western part of the country. The increasing volume of cheaper heavy oil in the supply mix has provided an incentive for refiners to upgrade their equipment to process the poorer-quality heavier crude occurring in tar sand. The upgrading investments have helped to maintain a demand for heavy oil in spite of the declining price of conventional crude since the early 1980s. As the demand for heavy oil and synthetic crude from tar sands remains strong, heavyhydrocarbon development projects are being initiated in western part of Nigeria. In addition, unsuccessful attempts to find new giant conventional oil fields in recent years have caused some producers to turn to the marginally economic heavy hydrocarbons to replace depleted petroleum reservoirs. Bitumen development in Nigeria is also poised to become Nigerian major foreign exchange earner, second to conventional oil in the coming years.
Informativo com as propostas de Fabio Palacio para o mandato 2013-2016. Engenheiro civil e advogado. Casado e pai de uma filha. Vereador no segundo mandato. Candidato à reeleição. O Futuro é agora! Vote Fabio Palacio - 22.626. Prefeita da família! Vote Regina Maura - 14.
Synthesis of the Decentralized Control System for Robot-Manipulator with Inpu...ITIIIndustries
It is discussed the problem of synthesis of the decentralized adaptive-periodic control system for two degrees of freedom robotic manipulator which have an input limitations. The solution of the problem is based on the use of hyperstability criterion, L-dissipativity conditions and dynamic filter-corrector.
Robust control for a tracking electromechanical systemIJECEIAES
A strategy for the design of robust control of tracking electromechanical systems based on 𝐻∞ synthesis is proposed. Proposed methods are based on the operations on frequency characteristics of control systems designed and developed using the MATLAB robust control toolbox. Determination of the singular values for a transfer matrix of the control system reduces the disturbances and guarantees its stability margin. For selecting the weighted transfer functions, the basic recommendations are formulated. The efficiency of the proposed approach is verified by robust control of an elastically coupled two-mass system whose parameter values are adjusted by matching them with the parameters of one of the supplied robots. The simulation results confirm that the proposed strategy of design of robust control of twomass elastic coupling system using the 𝐻∞ synthesis is very efficient and significantly reduces the perturbation of parameters of the controlled plant.
Performance analysis of a liquid column in a chemical plant by using mpceSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Controlling a DC Motor through Lypaunov-like Functions and SAB TechniqueIJECEIAES
In this paper, state adaptive backstepping and Lyapunov-like function methods are used to design a robust adaptive controller for a DC motor. The output to be controlled is the motor speed. It is assumed that the load torque and inertia moment exhibit unknown but bounded time-varying behavior, and that the measurement of the motor speed and motor current are corrupted by noise. The controller is implemented in a Rapid Control Prototyping system based on Digital Signal Processing for dSPACE platform and experimental results agree with theory.
2-DOF BLOCK POLE PLACEMENT CONTROL APPLICATION TO:HAVE-DASH-IIBTT MISSILEZac Darcy
In a multivariable servomechanism design, it is required that the output vector tracks a certain reference
vector while satisfying some desired transient specifications, for this purpose a 2DOF control law
consisting of state feedback gain and feedforward scaling gain is proposed. The control law is designed
using block pole placement technique by assigning a set of desired Block poles in different canonical forms.
The resulting control is simulated for linearized model of the HAVE DASH II BTT missile; numerical
results are analyzed and compared in terms of transient response, gain magnitude, performance
robustness, stability robustness and tracking. The suitable structure for this case study is then selected.
Trajectory Control With MPC For A Robot Manipülatör Using ANN ModelIJMER
In this study, in a computer the dynamic motion modelling of manipulator and control of
trajectory with an algorithm this has been tested. First after dynamic motion simulation of manipulator
has been made MPC Control. The result in this study we can observe that computed torque method gives
better results than MPC methods. So in trajectory control it is approved of using computed torque
method. In last part of this study the results are estimated forward development are exemined and
suggested. The model predictive control (MPC) technique for an articulated robot with n joints is
introduced in this paper. The proposed MPC control action is conceptually different with the trajectory
robot control methods in that the control action is determined by optimising a performance index over
the time horizon. A neural network (NN) is used in this paper as the predictive model.
2-DOF Block Pole Placement Control Application To: Have-DASH-IIBITT MissileZac Darcy
In a multivariable servomechanism design, it is required that the output vector tracks a certain reference
vector while satisfying some desired transient specifications, for this purpose a 2DOF control law
consisting of state feedback gain and feedforward scaling gain is proposed. The control law is designed
using block pole placement technique by assigning a set of desired Block poles in different canonical forms.
The resulting control is simulated for linearized model of the HAVE DASH II BTT missile; numerical
results are analyzed and compared in terms of transient response, gain magnitude, performance
robustness, stability robustness and tracking. The suitable structure for this case study is then selected.
2-DOF Block Pole Placement Control Application To: Have-DASH-IIBITT MissileZac Darcy
In a multivariable servomechanism design, it is required that the output vector tracks a certain reference
vector while satisfying some desired transient specifications, for this purpose a 2DOF control law
consisting of state feedback gain and feedforward scaling gain is proposed. The control law is designed
using block pole placement technique by assigning a set of desired Block poles in different canonical forms.
The resulting control is simulated for linearized model of the HAVE DASH II BTT missile; numerical
results are analyzed and compared in terms of transient response, gain magnitude, performance
robustness, stability robustness and tracking. The suitable structure for this case study is then selected.
Design Nonlinear Model Reference with Fuzzy Controller for Nonlinear SISO Sec...IJECEIAES
Model reference controller is considering as one of the most useful controller to specific performance of systems where the desired output is produced for a given input. This system used the difference between the outputs of the plant and the desired model by comparing them to produce the signals of the control. This paper focus on design a model reference controller (MRC) combined with (type-1 and interval type-2) fuzzy control scheme for single input-single output (SISO) systems under uncertainty and external disturbance. The model reference controller is designed firstly without fuzzy scheme based on an optimal desired model and Lyapunov stability theory. Then a (type-1 and Interval type-2) fuzzy controller Takagi-Sugeno type is combine with the suggested MRC in order to enhance the performer of it, the common parts between the two fuzzy systems such as: fuzzifier, inference engine, fuzzy rule-base and defuzzifier are illustrated. In this paper the proposed controller is applied to controla (SISO) inverted pendulum sustem and the Matlab R2015 software is used to carry out two simulation cases for the overall controlled scheme. The obtained results for the two cases show that the proposed MRC with both fuzzy control schemes have acceptable performance, but it have better performance with the interval type-2 fuzzy scheme.
Novel Artificial Control of Nonlinear Uncertain System: Design a Novel Modifi...Waqas Tariq
This research is focused on novel particle swarm optimization (PSO) SISO Lyapunov based fuzzy estimator sliding mode algorithms derived in the Lyapunov sense. The stability of the closed-loop system is proved mathematically based on the Lyapunov method. PSO SISO fuzzy compensate sliding mode method design a SISO fuzzy system to compensate for the dynamic model uncertainties of the nonlinear dynamic system and chattering also solved by nonlinear fuzzy saturation like method. Adjust the sliding function is played important role to reduce the chattering phenomenon and also design acceptable estimator applied to nonlinear classical controller so PSO method is used to off-line tuning. Classical sliding mode control is robust to control model uncertainties and external disturbances. A sliding mode method with a switching control low guarantees the stability of the certain and/or uncertain system, but the addition of the switching control low introduces chattering into the system. One way to reduce or eliminate chattering is to insert a nonlinear (fuzzy) boundary like layer method inside of a boundary layer around the sliding surface. Classical sliding mode control method has difficulty in handling unstructured model uncertainties. One can overcome this problem by applied fuzzy inference system into sliding mode algorithm to design and estimate model-free nonlinear dynamic equivalent part. To approximate a time-varying nonlinear dynamic system, a fuzzy system requires a large amount of fuzzy rule base. This large number of fuzzy rules will cause a high computation load. The addition of PSO method to a fuzzy sliding mode controller to tune the parameters of the fuzzy rules in use will ensure a moderate computational load. The PSO method in this algorithm is designed based on the PSO stability theorem. Asymptotic stability of the closed loop system is also proved in the sense of Lyapunov.
Data-driven adaptive predictive control for an activated sludge processjournalBEEI
Data-driven control requires no information of the mathematical model of the controlled process. This paper proposes the direct identification of controller parameters of activated sludge process. This class of data-driven control calculates the predictive controller parameters directly using subspace identification technique. By updating input-output data using receding window mechanism, the adaptive strategy can be achieved. The robustness test and stability analysis of direct adaptive model predictive control are discussed to realize the effectiveness of this adaptive control scheme. The applicability of the controller algorithm to adapt into varying kinetic parameters and operating conditions is evaluated. Simulation results show that by a proper and effective excitation of direct identification of controller parameters, the convergence and stability of the implicit predictive model can be achieved.
Integral Backstepping Sliding Mode Control of Chaotic Forced Van Der Pol Osci...ijctcm
ABSTRACT
Forced Van der Pol oscillator exhibits chaotic behaviour and instability under certain parameters and this poses a great threat to the systems where it has been applied hence, the need to develop a control method to stabilize and control chaos in a Forced Van der Pol oscillator so as to avoid damage in the controlled system and also to prevent unmodeled dynamics from being introduced in the system. Sliding Mode control makes use of the regulatory variables derived from the controlled Lyapunov function to bring the new variables to stability. The essence of using Integral Backstepping was to prevent chattering which can occur in the control input and can cause instability to the system by igniting unmodeled dynamics. Simulation was done using MATLAB and the results were provided to show the effectiveness of the proposed control method. Integral Backstepping Sliding Mode control method was effective towards stability and chaos control. It was also robust towards matched and unmatched disturbance.
Output feedback trajectory stabilization of the uncertainty DC servomechanism...ISA Interchange
This work proposes a solution for the output feedback trajectory-tracking problem in the case of an uncertain DC servomechanism system. The system consists of a pendulum actuated by a DC motor and subject to a time-varying bounded disturbance. The control law consists of a Proportional Derivative controller and an uncertain estimator that allows compensating the effects of the unknown bounded perturbation. Because the motor velocity state is not available from measurements, a second-order sliding-mode observer permits the estimation of this variable in finite time. This last feature allows applying the Separation Principle. The convergence analysis is carried out by means of the Lyapunov method. Results obtained from numerical simulations and experiments in a laboratory prototype show the performance of the closed loop system.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Research and Development the Adaptive Control Model Using the Spectrometer Detector.
1. The International Journal Of Engineering And Science (IJES)
|| Volume || 5 || Issue || 12 || Pages || PP 23-31 || 2016 ||
ISSN (e): 2319 – 1813 ISSN (p): 2319 – 1805
www.theijes.com The IJES Page
23
Research and Development the Adaptive Control Model Using the
Spectrometer Detector.
Victoria Golubova1,
Igors Uteshevs2
1,2
Riga Technical university, Riga, Latvia
--------------------------------------------------------ABSTRACT-----------------------------------------------------------
In this paper there are consider the automatic adaptive control system, selected adaptive control system with the
standard model.The mathematical model of adaptive control system with the etalon-model is developed.
Constructed and researched mathematical model of adaptive system with a reference model using MathLab
Simulink software.There are researched adaptive control system responds to various external influences.
Keywords: Adaptive control system, etalon-model, automation control system.
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Date of Submission: 26 November 2016 Date of Accepted: 10 December 2016
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I. INTRODUCTION
The introduction of the paper should explain the nature of the problem, previous work, purpose, and the
contribution of the paper. The contents of each section may be provided to understand easily about the paper.
Modern process automation is widely applied in automatic control systems based on adaptive systems, which
allow implementation of various management and control capabilities.
The faster and more accurate will be implemented control and stabilizing the facility in case of emergency,
because the facility will be safer functioning and use.
The goal of this paper - to develop the mathematical model for adaptive control system with a etalon-model and
analyze the results. One of the elements is a spectrometer detector, which is necessary to determine the radiation
level and the radiation element analysis of an emergency.
Spectrometer detector determines the radiation intensity and spectrometric composition. Automatic adaptive
control systems with a etalon model has good adaptation characteristics to adapt to significant external and
internal working conditions as well as high-speed channel parameter settings. Mathematical model of adaptive
properties of influence was used with a variety of external influences. Such systems relatively easy realization of
technical terms, those contribute to such a system wide application in various technical fields. The mathematical
model is designed in MATLAB Simulink environment.
The spectrometric detector measured level of radiation, and if this level increases, spectrometric detector
automatically switches in control and safety system against radiation.
X-ray fluorescence spectrometers are used:
Ecology and environmental protection: Determination of heavy metals in soil, water, sediment and other;
Geology and mineralogy: the quality and quantity of soils, minerals and other analysis;
Metallurgy and chemical industry: raw materials, production process and finished goods quality control;
Paints and varnishes industry: lead paint analysis;
Jeweler industry: Measuring the concentration of precious metals;
Oil industry: oil and fuel contamination determination;
Food industry: toxic metals in food ingredients;
Agriculture: Analysis of trace elements in the soil and agricultural products;
Archaeology: Element Analysis;
Space research: celestial body elemental composition investigation orbit;
Army: environmental parameters violation analysis, military units and surrounding areas check with toxic
elements contamination;
Energy - corrosion analysis of the product mix, the reactor washing performance, fuel quality
determination. [1]
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Figure 1. Spectrometer with semiconductor detectors block diagram
Multi-channel amplitude analyzer is designed for information gathering, processing and output of computer
pulse amplitude after allocation that comes from the detection device.
Semiconductor detector converts roentgen rays proportional amplitude electrical signals, which are reinforced
and then treated with analogous devices. The analogue output processor formed rectangular pulses with a
positive polarity, which is filtered and edited in an appropriate way, to send them spectrometric analog-digital
converter.
II. THE ADAPTIVE CONTROL MODEL
Adaptive System is a system that automatically changes its functioning algorithm data, and (sometimes) its
structure with a view to maintaining and achieving an optimal state of the changing external conditions. [[1]].
In order to ensure the required system performance quality (accuracy, stability, performance) control unit and the
control object parameters must be strictly coordinated [[1]].
Adaptive control system can be described as follows - the main advantage is the ability to adapt previously
unknown changes in management facility, which makes it possible to provide the same high quality of the system
in changing working environments.
Analytical adaptive management systems, directly or indirectly, is a model with the desired dynamic
characteristics.
Adaptation algorithm task is to tune the regulator coefficients of a kind to reduce the discrepancy between the
control and the object model to zero. Such leadership is called direct adaptive management and systems -
adaptive systems with a reference-model.
To direct adaptive control, adaptive circuit after working in closed cycle, which allows controlling the object
parameter and regulatory changes in the functioning in time.
However, each self-confidence circuit increases the order of the system to the minimum ones, and thus a
significant impact on the overall dynamics of a closed system [[1]].
In Fig. 2 it appears adaptive automatic control system in which the adaptation unit is connected in parallel.
Figure 2. The Adaptive System Functional scheme
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Adaptive control system consists of the main control circuit with negative feedback and self-confidence
equipment adaptation of the principle of realization. It is based on a closed system with feedback that includes
automatic control system and automatic control object. It is complemented by an adaptation device which
realizes the control object identification and automatic control equipment parameters alignment changing control
characteristics of a facility. [[2]]
III. THE ADAPTIVE SYSTEM WITH THE ETALON-MODEL
Etalon-model is a model that, in its dynamic performance is a benchmark for control systems.
Control object and have etalon-model outputs are compared and the difference is used to change the
organization of the system. Changes may be as configurable parameters, and compensation signals.
Adaptive control systems with etalon-model, quality of management depends on the etalon-model of the dynamic
properties and how exactly suited to the properties of a dynamic object of control [[3]].
The purpose of the adaptation systems with a reference model, is described as follows:
0)(limlim
m
tt
yy . (1)
If the result of the setting of the object transmission function coincides with a etalon-model transmission
function, then:
0lim
t
[14].
At etalon-model for automatic quality control are done with self-confidence system. This quality is measured by
self predisposing criterion is the extremum of a error function [14]:
min)()( m
yyQQQ . (2)
In many cases, conveniently choose conventional criteria instantaneous square error.
)(
2
tQ . (3)
Etalon-model schemes are often used setting the gradient method. If you apply the gradient definition, the
function should be examined as a criterion, which is the system predisposing parameter β function.
Then, after the gradient method self predisposing system parameters change function:
gradQ , (4)
Where:
λ – the positive coefficient;
λ sign "+" refers to the function with extremum - maximum;
λ sign “ –“ function with extremum- minimum.
The partial derivative of the criterion Q by parameter β can count as follows:
QQ
. (5)
This equation how the partial derivative can be obtained as a multiplier of two results:
• a derivative of the criteria by errors;
• the partial derivative of the error after the parameter β.
Adaptive system with etalon- model is used with the function Q extremum- minimum.
To equation (4) will get:
QQ
. (6)
Where
λ – Proportional coefficient (λ>0) [[3]].
IV. MATHEMATICAL MODEL FOR ADAPTIVE CONTROL SYSTEM
A mathematical method for use in any system operation study is necessary to draw up its mathematical model.
In first, mathematical model for drawing up it is necessary to determine the size of the package, which may serve
as a system of functioning of the quantitative characteristics.Secondly, it is necessary to determine the
relationship between these characteristics, the description about the actual functioning of the system. Adaptive
automatic control system parameters of the object change takes place external exposure factors. Adaptive
automatic control system with etalon- model structural scheme is shown in Fig 3.
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Figure 3. Adaptive System Functional block scheme
In this scheme (Fig 3) the controlled object - this space, this can be affected by external agents (reactive
materials, such as radiation). The etalon-model is a model of the space with the optimal settings (without
external influences). Adapter - a spectrometric detector that responds to external stimulus. Using the
spectrometer can determine the direct effect of substance objects and can be measured (emission) intensity
exposure. Based on the data of this substance can choose which type of protection can be used in various cases.
This case is used type of protection - closing the door space for insulation. It is assumed that the type of lead
radiation shielding door.The control unit - is the regulator. External exposure F is added to the object transfer
function ob
W parameters. In the case of the model structure is used in a closed system with a controlled device
and the object first round aperiodic a function.
The control device transmission function:
1
)(0
pT
k
pW
r
r
r ; (7)
The object transfer function without external influences:
1
)(0
pT
k
pW
ob
ob
ob ; (8)
The transfers function of the model:
obrrob
obr
obr
obr
m
kkpTpT
kk
pWpW
pWpW
pW
)1()1()()(1
)()(
)(
00
00
; (9)
Where:
)( pW ob
- the object transmission function without external influences;
r
k - control device transmission coefficient;
ob
k - object transmission coefficient;
r
T - control device time constant;
ob
T - object time constant;
p - Laplace operator.
If there is only one external impact F, then it is added to the factor. In this case, the object transmission function
is expressed by the following formula:
1
)(
pT
Fk
pW
ob
ob
ob . (10)
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If the adapter is a proportional regulator, then the transfer function can be expressed as follows:
adaptadapt
kpW )( . (11)
Where:
adapt
k <0 – adapter transmission ratio should be less than zero in order to reduce system error ε [[4]].
Now look at look like the control of the transmission function. At the controls of the transmission functions will
be added r
k [[4]]:
)( madaptadaptr
yykkk . (12)
New controls transmission function is as follows:
r
r
r
r
k
pT
k
pW
1
)( . (13)
Now that are aware of the subject and controls the transmission functions can determine the basic system control
loop transfer function:
])1([)()1()1(
])1([)(
1
)(
rrrobrob
rrrob
rob
rob
AVS
kpTkFkpTpT
kpTkFk
WW
WW
pW
. (14)
If in formula (3.6) replace the expression of the formulas (9) and (14) will get the following [[4]]:
.
)1()1(
])1([)()1()1(
])1([)(
{
obrrob
obr
rrrobrob
rrrob
adaptr
kkpTpT
kk
kpTkFkpTpT
kpTkFk
kk
(15)
V. THE ADAPTIVE AUTOMATIC CONTROL SYSTEM SIMULATION
Now look at the appearance of the automatic control system with benchmark-model scheme in MathLab
Simulink environment (Fig 4.).
Input signal:
0
y = 1 - constant.
Scope will appear in the output signal y, the signal between the subject and the control u and the difference
between input and output signal e.
Figure 4. Adaptive control system scheme in MathLab
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Slave object MathLab Simulink scheme shown in Fig 5.
Figure 5. Slave object scheme
Describe the circuits controlled by the transfer function of the object - an appropriate transfer function:
110
5
s
- conform
1Tp
k
transmission function,
Where:
s = p - Laplace operator.
)( pW ob
- object transfer function
ob
k =5 - coefficient
ob
T =10. - time constant
External exposure is given by F. spectrometer responds to radiant energy, once the size of the energy
spectrometer distinguishes reactive elements which act on the object. Therefore, the external impact will be
constant, which indicates the radiant energy.
Now we look for additional controls, the adapter and the resource block model. Mathlab Simulink reference
model block shown in Fig 6.
Reference model of the transfer function of the first stage of aperiodic function
1Tp
k
.
Figure 6. Etalon-model block scheme in MathLab Simulink
Etalon-model transfer function:
61110
5
)()(1
)()(
)( 2
21
21
sssWsW
sWsW
sW m . (16)
Where :
s = p – Laplace operator.
Adapter block realization in MathLab Simulink environment is shown in Fig 7.
Adapter transmission coefficient is 1adapt
k .
Figure 7. Adapter block scheme
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Next, look at the control unit, which is shown in Fig 8.
Figure 8. Master device block scheme in MathLab Simulink.
Describe circuit controls the transmission function in Fig 8:
Where:
1
1
s
- conform
1Tp
k
transmission function,
s = p – Laplace operator.
)( pW r
- object transfer function
r
k =1 - coefficient
r
T =1. – times constant
During the experiment, the working scheme was changed external exposure of the object. Diagrams can be seen
as a change in the output signal y, the signal between the subject and control, etc., as well as input and output
signal difference to various external influences. The main objective of the scheme is to compensate for the
external effects. Experiment assumed that the simulation time is 10 seconds.
Let's look at the first results. The first case of external exposure of the object was not, it is that F is equal to zero.
Figure 9. Adaptive control system without effect (F = 0)
In Fig 9 shows that the amplitude of the output signal y will increase to almost 1. Thus, suppose that the output
signal amplitude is almost equal to the ones, and this is the normal state of the object. But the signals between
the control device and the object, etc. and between the outgoing and incoming e decreases to a value of 0.17. It
appears that all signals stabilizes around 10 (ten) simulations in second.
When an external force is greater than zero it can be said that in this case the object exposed to radiation, then an
error occurs ε the exchange of the object transmission function for reasons arising from the difference between
the output signal y and the reference-model output signal.
Fig 10 it is to show the adaptive control system signals. In this case, the control system is affected by external
impact F, which are identical to the ones (F = 1).
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Figure 10. Adaptive control system with effect (F = 1)
The Fig10. shows that the amplitude of the signal between the control signal U and the object changes. The
signal amplitude reaches negative values. About 9 (nine) seconds signal is stabilization. When the signal is
stabilized, the amplitude is a negative value.
Now look at the output y. The signal amplitude also fluctuates. In start time (t = 0) the signal amplitude
decreases from 1 to 0,7 and then committed to 1.
The signal e (difference between input and output signal) and the amplitude range is trying to achieve
stabilization.
Fig 11 showing amplitude adaptive system, when the external force acting on the object is 15 (F = 15).
Figure 11. Adaptive control system with effect (F = 15)
Now look at how to affect the result of external impact, which is equal to 15 (Fig 11) It is seen that the amplitude
of the signal u receive negative values. As well as stabilization occurs before the transition process. Signal
stabilization occurs in about 8 (eighth) per second. With this signal occurs output compensation.
The output signal y start time reaches the value 15, and then gradually decreases. The transition process lasts
approximately 8 seconds and then signals stabilization.
e signal amplitude in this case has a negative value. The transition process lasts 7 seconds.
Fig 12 displays signal amplitude graphs, in the case of external exposure of the object is equal to 59 (F = 59).
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Figure 12. Adaptive control system with effect (F = 59)
In Fig 12 it is shown that the amplitude of the signal, etc., as well as in the case when the external effects (of any
size exposure) has a negative value. Transition process takes 8 seconds, followed by the process of stabilization.
The signal u compensated output signal y.
The output signal y start time t=0 has the value 59, and then gradually decreases. E signal amplitude where an
external force is F=59 has negative values. Both signals the transition process lasts 7 seconds.
The aim of the experiment - to compare the output signal y, signals, etc. between the control device and the
object, and e the difference between output and input signals to various external influences.
It analyzes the adaptive control system, when it is exposed to different sizes of external exposure. From the
results it is evident that at various external exposure values during the transition process is nearly the same value.
One can also see that the external effects of an increase in the entire signal amplitude stabilization are more
important. Also, if are looking at Fig 9 and Fig 10, then it is evident that without the external effect on the object
or when it is equal to the value of 1 all signal curves did not manage to stabilize the simulation (t=10 sec).
According to the simulation results it shows that the adaptive control system helps reduce the use of external
exposure to the object, as well as to stabilize the value.
VI. CONCLUSION
X-ray spectrometric detector use in industrial enterprises with high radiation exposure level allows quickly
todetermine the source of the irradiance and radiation intensity, as well as the elimination of accidents with
minimal radiation exposure to personnel;
To analyze the adaptive control system with etalona- model operation to different external influences;
Study of adaptive control system stability;
It was compared the results to various external influences;
Work was carried out in the model analysis using the computer program MathLab Simulink;
It is observed adaptive control system with etalona-model operation to different external influences;
Automatic control systems with the use of spectrometric detection industry, where there is radiation spread a
positive effect on people and the environment. This system has the advantage that an adverse event, it reacts
instantly, and can avoid losses.
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