Cold test nodal and distorsion analysis
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This document summarizes a torsional distortion analysis of a new solid tip on an 1806 RPOA cold test. It describes the original driveline design and modeling assumptions. Nodal, frequency, and Campbell analyses were conducted. Key findings include critical speeds of 1500 rpm, critical frequencies of 230-280 Hz, and coincidence of the 12th order engine and electric motor excitations. Modes 1, 2 and 3 were identified as critical. The analysis considered cases both with and without the electric motor bearing to identify its effects.
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#include <reg51.h>
sbit switch = P2^7;
void main() {
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Innovative Calibration Arm - design booklet
Patent-pending designs for a torque meter calibration arm with modern design concepts and an innovative adjustment mechanism.
Engine Cavity measurement
1. The document analyzes cavity measurements and volume calculations for various engine components, including intake and exhaust cavities.
2. It finds that the current volumes do not meet the goal of 85% or higher volume percentage for the exhaust and intake cavities.
3. It provides proposed corrections to reduce the port and transfer channel volumes, including shortening the length or reducing the radius of the channels. The corrected dimensions are estimated to meet the 85% target volume percentage.
TVA general requirements
This document outlines the general requirements for modeling a driveline system connecting an engine to a machine. It lists tools and software needed like MATLAB and CAD software. It also lists engineering specifications required like the engine and driveline designs, material properties, operating speeds, and torque variation methods. Manufacturing requirements include assembly alignment verification. The expected outcomes are a report locating the system's natural frequencies and critical speeds, and identifying vibration nodes and structural failure modes.
External collar dampener - copyrights reserved
A brief highlight of design verification process of a collar damper designed to reduce the torsional distortions of the rotating machinery.
Adjustable driveline effect on mode shapes and nodal distribution study
A brief study investigating the driveline components significance on the vibration modes of the system.
Factory analysis simulation 2
This document analyzes a factory's production capacity at various annual output goals. It finds that at 30,000 units/year, the factory runs with no issues but has optimization opportunities. At 50,000 units, all loops are capable except stations 860A and 860B, which need 30% reduced cycle times. Achieving 60,000 units requires clearing blockages on the TBU loop by reducing stations 860A and 860B cycle times 40%. A 70,000 unit goal would cause blockages on the TBU loop and stations exceeding takt time on the Main Assy loop.
Factory analysis simulation
A process analysis and factory simulation results for an engine development factory, created using Autodesk process analysis software.
دور قناة الجزيرة الإنجليزية في التأثير على الفكر الغربي تجاه قضايا العرب وح...
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This document provides an overview of variable valve lift technology. It discusses how variable valve lift can improve engine performance, fuel economy, and emissions by varying valve timing and lift to optimize for different operating conditions. It describes several types of current variable valve lift systems including Fiat/Chrysler Multiair, Honda V-Tec, BMW Valvetronic, and Mercedes Benz Camtronic which vary lift through electrohydraulic, electromechanical or cam-based actuators. The document also covers camshaft terminology, factors that influence volumetric efficiency, and the goal of maintaining a valve Mach number below 0.6 for best efficiency.
Dynometer project data acquisition filtering
This document describes a dynamometer project involving data acquisition and filtering of force data measured by a load cell. The load cell measures the force applied by an alternator connected to an engine. Software filters are used to filter noise from the load cell data. A Butterworth low-pass filter with a 25Hz cutoff frequency and order of 5 is used. The filtered and unfiltered force data are presented on graph indicators to compare the results and evaluate engine torque.
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ACEP Magazine edition 4th launched on 05.06.2024
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
Embedded machine learning-based road conditions and driving behavior monitoring
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Unit-III-ELECTROCHEMICAL STORAGE DEVICES.ppt
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
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The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
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The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
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A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMS
The smart irrigation system represents an innovative approach to optimize water usage in agricultural and landscaping practices. The integration of cutting-edge technologies, including sensors, actuators, and data analysis, empowers this system to provide accurate monitoring and control of irrigation processes by leveraging real-time environmental conditions. The main objective of a smart irrigation system is to optimize water efficiency, minimize expenses, and foster the adoption of sustainable water management methods. This paper conducts a systematic risk assessment by exploring the key components/assets and their functionalities in the smart irrigation system. The crucial role of sensors in gathering data on soil moisture, weather patterns, and plant well-being is emphasized in this system. These sensors enable intelligent decision-making in irrigation scheduling and water distribution, leading to enhanced water efficiency and sustainable water management practices. Actuators enable automated control of irrigation devices, ensuring precise and targeted water delivery to plants. Additionally, the paper addresses the potential threat and vulnerabilities associated with smart irrigation systems. It discusses limitations of the system, such as power constraints and computational capabilities, and calculates the potential security risks. The paper suggests possible risk treatment methods for effective secure system operation. In conclusion, the paper emphasizes the significant benefits of implementing smart irrigation systems, including improved water conservation, increased crop yield, and reduced environmental impact. Additionally, based on the security analysis conducted, the paper recommends the implementation of countermeasures and security approaches to address vulnerabilities and ensure the integrity and reliability of the system. By incorporating these measures, smart irrigation technology can revolutionize water management practices in agriculture, promoting sustainability, resource efficiency, and safeguarding against potential security threats.
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本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
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Recycled Concrete Aggregate in Construction Part III
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KuberTENes Birthday Bash Guadalajara - K8sGPT first impressions
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
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本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
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Cold test nodal and distorsion analysis
- 1. 1 TORSIONAL DISTORSION ANALYSIS 1806 RPOA COLD TEST-NEW SOLID TIP | STUDY Ra’uf Tailony 05/10/2017 ORIGINAL DESIGN Figure 1: New Driveline tip. NODAL ANALYSIS Figure 2: Vibration nodes locations on driveline. Mode 2,3Mode 4,5
- 2. 2 Figure 3: Torque and speed signatures (ramping 0-2000 rpm). MODELING ASSUMPTIONS Homogeneous material along the driveline (AISI 4130 steel Annealed at 860 0 C). All parts are rotating at the same speed (relative angular velocity=0). Electrical motor slipping is neglected. Residual friction is neglected. All considered bearings are ball bearing type with zero lateral forces. Center of gravity is assumed to be static on a dynamic assembly. Geometry is treated as a fixed-free structure. Rayleigh’s equations solution is exact with no iteration. Ramping up speed = 1500 rpm Ramping down speed = 1500 rpm - 1500 rpm is a critical speed. - Critical Frequency = 230 - 280 Hz. - Critical Modes are 1, 2 and/or 3. - Critical Excitation order is 12th order (Engine and E-motor 12th orders are coinciding). OBSERVATIONS
- 3. 3 INITIAL CONDITIONS Input torque = 300 N.m. Rotational speed range = 0 - 2000 rpm. Centrifugal force is proportional to the driveline’s speed. Excitation diagram is dependent on a standard V8 engine specifications. FREQUENCY ANALYSIS RESULTS Figure 4: Mode shape vs. Frequency with and without E-motor bearing.
- 4. 4 INTERFERENCE DIAGRAMS AND CRITICAL SPEEDS Figure 5: Campbell diagram for mode1 (bearing considered) and mode3 (bearing ignored). NARROWING ROOT CAUSE PROBLEM Figure 6: Original driveline components nodal effects. Mode 1 effect Mode 2,3 effect
- 5. 5 Mode “E-motor bearing ignored” Freq. [Hz] “E-motor bearing considered” Freq. [Hz] 1 104 2301 2 120 600 3 280 615 4 815 1050 5 816 1080 Table 1: Frequencies vs. modes. 1 Highlighted frequencies are found in the torque signatures.