This document discusses balancing of rotating masses. It defines balancing as reducing unbalance to an acceptable level or eliminating it entirely. There are two types of balancing: static and dynamic balancing of rotating masses, and balancing of reciprocating masses. Balancing of rotating masses involves attaching a mass to counteract the centrifugal force from an initial disturbing mass. Several cases are discussed, like balancing a single mass with one or two other masses in the same or different planes. Analytical and graphical methods to determine the required balancing masses and their positions are also presented.
The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
Unit 5- balancing of reciprocating masses, Dynamics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Unit 7-gear trains, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Design of flywheel theory and numericals prof. sagar a dhotareSagar Dhotare
1. Introduction.
2. Coefficient of Fluctuation of
Speed.
3. Fluctuation of Energy.
4. Maximum Fluctuation of
Energy.
5. Coefficient of Fluctuation
of Energy.
6. Energy Stored in a Flywheel.
7. Stresses in a Flywheel Rim.
8. Stresses in Flywheel Arms.
9. Design of Flywheel Arms.
10. Design of Shaft, Hub and
Key.
11. Construction of Flywheel.
This presentation gives an introduction to mechanical vibration or Theory of Vibration for BE courses. Presentation is prepared as per the syllabus of VTU.For any suggestions and criticisms please mail to: hareeshang@gmail.com or visit:ww.hareeshang.wikifoundry.com.
Thanks for watching this presentation.
Hareesha N G
BEST PPT FOR DOWNLOADING & SUBMISSION
INFORMATION IN POINTS
When the inertia forces are considered in the analysis of the mechanism, the analysis is known as dynamic force analysis.
Now applying D’Alembert principle one may reduce a dynamic system into an equivalent static system and use the techniques used in static force analysis to study the system.
Garcia and Bayo (1994), Wang and Wang (1998), Shi and Mc Phee (2000) were interested in the analytical and
experimental study of the dynamic response of these mechanisms
Unit 5- balancing of reciprocating masses, Dynamics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Unit 7-gear trains, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Design of flywheel theory and numericals prof. sagar a dhotareSagar Dhotare
1. Introduction.
2. Coefficient of Fluctuation of
Speed.
3. Fluctuation of Energy.
4. Maximum Fluctuation of
Energy.
5. Coefficient of Fluctuation
of Energy.
6. Energy Stored in a Flywheel.
7. Stresses in a Flywheel Rim.
8. Stresses in Flywheel Arms.
9. Design of Flywheel Arms.
10. Design of Shaft, Hub and
Key.
11. Construction of Flywheel.
This presentation gives an introduction to mechanical vibration or Theory of Vibration for BE courses. Presentation is prepared as per the syllabus of VTU.For any suggestions and criticisms please mail to: hareeshang@gmail.com or visit:ww.hareeshang.wikifoundry.com.
Thanks for watching this presentation.
Hareesha N G
BEST PPT FOR DOWNLOADING & SUBMISSION
INFORMATION IN POINTS
When the inertia forces are considered in the analysis of the mechanism, the analysis is known as dynamic force analysis.
Now applying D’Alembert principle one may reduce a dynamic system into an equivalent static system and use the techniques used in static force analysis to study the system.
Garcia and Bayo (1994), Wang and Wang (1998), Shi and Mc Phee (2000) were interested in the analytical and
experimental study of the dynamic response of these mechanisms
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
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.
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Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
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• Compatible with IDM8000 CCR.
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• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Dynamics of Machines - Unit II-Balancing of Rotating Masses
1. ME8594 - DYNAMICS OF MACHINES
UNIT-II-BALANCING
(BALANCING OF ROTATING MASSES)
By,
Dr.S.SURESH,
Assistant Professor,
Department of Mechanical Engineering
Jayalakshmi Institute of Technology.
2. WHAT IS MEANT BY BALANCING
Balancing is the process of designing or modifying
machinery so that the unbalance is reduced to an
acceptable level and if possible is eliminated
entirely.
3. Different types of balancing
1. Balancing of rotating masses
I. Static balancing
II. Dynamic balancing
2. Balancing of reciprocating masses.
4. BALANCING OF ROTATING MASSES
Certain mass (m1) is attached to a rotating shaft
It exerts some centrifugal force
Bend the shaft and to produce vibrations
In order to prevent the effect of centrifugal force
Another mass (m2) is attached to the opposite
side of the shaft
centrifugal force of both the masses are made to
be equal and opposite.
rotating masses are balanced
5. The following cases are important from
the subject point of view:
1. Balancing of a single rotating mass by a
single mass rotating in the same plane.
2. Balancing of a single rotating mass by two
masses rotating in different planes.
BALANCING OF ROTATING MASSES
6. 3. Balancing of different
masses rotating in the
same plane.
4. Balancing of different
masses rotating in
different planes.
7. Let r1 = radius of rotation of the mass m1
m1 = a disturbing mass attached to a shaft rotating at
ω rad/s.
Centrifugal force exerted by the mass m1 =
1) Balancing of a single rotating mass by a single mass
rotating in the same plane.
m2 = balancing mass
For complete balance = FC1 = FC2
CASE 1
8. 3. BALANCING OF SEVERAL MASSES ROTATING IN THE SAME PLANE
m1, m2, m3 and m4 = Magnitude of masses (Kg)
r1, r2, r3 and r4 = Radius of rotation (m)
θ1, θ2, θ3 and θ4 = angles of these masses with the horizontal line OX
ω = Constant angular velocity (rad/s).
CASE 3
9. The magnitude and position of the balancing mass may be found out
analytically or graphically.
1. Analytical method
(i) Find out the centrifugal force
Fc = m . R
(ii) Resolve the centrifugal forces horizontally and vertically and
find their sums, i.e. ∑ H and ∑V
∑ H = m1 r1 cos θ1 + m2 r2 cos θ2 + m3 r3 cos θ3
∑V = m1 r1 sin θ1 + m2 r2 sin θ2 + m3 r3 sin θ3
(iii) Magnitude of the resultant centrifugal force
10. (iv) If θ is the angle, which the resultant force make
with the horizontal
tan θ = ∑V / ∑H
(v) The balancing force is then equal to the resultant
force, but in opposite direction.
(vi) Now find out the magnitude of the balancing
mass, such that
11. Example:
1. Four masses m1, m2, m3 and m4 are 200 kg, 300 kg, 240 kg and
260 kg respectively. The corresponding radii of rotation are 0.2 m,
0.15 m, 0.25 m and 0.3 m respectively and the angles between
successive masses are 45°, 75° and 135°. Find the position and
magnitude of the balance mass required, if its radius of rotation is
0.2 m.
Given Data:
m1= 200 kg ; m2= 300 kg ; m3= 240 kg ; m4= 260 kg ;
r1= 0.2 m ;r2= 0.15 m ; r3= 0.25 m ; r4= 0.3 m ;
θ1 = 0° ;
θ2 = 45° ;
θ3 = 45° + 75° = 120° ;
θ4 = 45° + 75°+ 135° = 255° ;
r = 0.2 m
To find:
Magnitude and position of the balance mass (m & θ)
12. SOLUTION:
Magnitude of centrifugal forces
1. Analytical method
Resolving m1.r1, m2.r2, m3.r3 and m4.r4 horizontally,
Resolving m1.r1, m2.r2, m3.r3 and m4.r4 vertically,
= m1 r1 cos θ1 + m2 r2 cos θ2 + m3 r3 cos θ3
= m1 r1 sin θ1 + m2 r2 sin θ2 + m3 r3 sin θ3
13. Resultant centrifugal force
=
We know that ...
R = m.r = 23.2
Direction of Resultant force
Angle of the balancing mass from the horizontal mass of 200 kg
m = 116 kg Ans.
θ = 201.48° Ans.
14.
15. Graphical Method
1. Draw the space diagram showing the positions of all the given masses
as shown in Fig.
Space diagram
2. Centrifugal force of each mass
16. 3. Draw the vector diagram with the above values, to some suitable scale
Vector Diagram
Space Diagram
Scale: 1 cm: 10 kg.m
Measurement from Vector diagram
Find that
Balancing force is equal to resultant force but
opposite in direction
ae = Resultant Force = 23 kg-m
17. 4. BALANCING OF DIFFERENT MASSES ROTATING
IN DIFFERENT PLANES
In order to have a complete balance of the several revolving masses in
different planes, the following two conditions must be satisfied :
1. The forces in the reference plane must balance,
i.e. the resultant force must be zero.
2. The couples about the reference plane must balance,
i.e. the resultant couple must be zero.
CASE 4
18. m 1, m 2, m 3 & m 4 = Revolving in planes 1, 2, 3 and 4
m L & m M = Balancing masses in the plane M and N
Rp = Reference Plane
Position of planes of the masses Angular position of the masses
CASE 4. BALANCING OF DIFFERENT MASSES ROTATING IN DIFFERENT PLANES
19. EXAMPLE 1
A shaft carries four masses A, B, C and D of magnitude 200 kg, 300 kg, 400 kg and 200 kg
respectively and revolving at radii 80 mm, 70 mm, 60 mm and 80 mm in planes measured from A at
300 mm, 400 mm and 700 mm. The angles between the cranks measured anticlockwise are A to B
45°, B to C 70° and C to D 120°. The balancing masses are to be placed in planes X and Y. The
distance between the planes A and X is 100 mm, between X and Y is 400 mm and between Y and D is
200 mm. If the balancing masses revolve at a radius of 100 mm, find their magnitudes and angular
positions.
CASE 4- Balancing of different masses rotating in different planes
Given data: To find
m A = 200 kg , rA = 80 mm (i) Magnitude of Balancing masses (mX, mY)
m B = 300 kg, rB = 70 mm (ii) Angular positions of Balancing masses
m C = 400 kg, rC = 60 mm (θX , θY)
m D = 200 kg, rD = 80 mm
20. Solution:
Plane Mass (m)
(Kg)
Radius (r)
(m)
Cent. Force
(Fc=m.r)
(kg.m)
Distance from
RP (l) (m)
Couple
(m.r.l)
(Kg.m2)
A
X (RP)
B
C
Y
D
200
m
X
300
400
m
Y
200
0.08
0.1
0.07
0.06
0.1
0.08
16
0.1 m
X
21
24
0.1 m
Y
16
-0.1
0
0.2
0.3
0.4
0.6
-1.6
0
4.2
7.2
0.04 m
Y
9.6
21. • Couple Polygon
Scale:
1 cm = 1 kg.m 2
By measurement from couple polygon
0.04 m
Y
= Vector d
|
o
|
= 7.3 Kg-m
2
Angular position of mY