...Organizational Issues Axia College of the University of Phoenix ETH/316 Mary Sortino Feb. 12, 2013 The film I choose is “Good Vibrations” an animated film that was found on the, The Responsibility Project website. The film is about community responsibility and what the cost are involved in being self- righteous. In the film there is a construction worker using a jackhammer to break up concrete in the street, which is causing the surrounding area shake. It is causing a loose piece of concrete shake causing people who walk by it on the sidewalk to trip and fall. In the office building across the street from where this was happing, many of the office workers were watching the people trip and fall on the loose concrete and laughing and making fun of all the people that were falling. The next person that was walking down the side walk was an older gentleman that was walking with a cane. One of the workers that was laughing at the other people that fell noticed the old man he was going to warn the gentleman about the trip hazard, but he was unable to get the window open in time. The man did not fall and stood on the loose concrete after seeing that this is a major hazard to other people. The older man keeps putting up the caution sign that keeps falling over due to the vibration of the jackhammer, before the little boy riding his bike passes over it and gets hurt from falling on the loose section of concrete. The issue in this film makes a very important point...
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...Question 1 (a) The House of Quality functions as a living document and a source of ready reference for related products and future upgrades. While it is a great communication tool at each step in the process, the matrices are the means and not the end. Its purpose is to serve as a vehicle for dialogue to strengthen vertical and horizontal communications. Through customer needs and competitive analysis, the House of Quality helps to identify the critical technical components that require change. Issues are addressed that may never have surfaced before. These critical issues are then driven through the other matrices to identify the critical parts, manufacturing operations, and quality control measures needed to produce a product that fulfils both customer needs and producer needs within a shorter period of development cycle time. The net effect of all of this is that the items that drive the company’s action are driven by the customer’s requirements. There is an increase in focus on the customer and an increased awareness of their wants. Because of this focus, the process leads to improved customer understanding and the ultimate outcome- a satisfied customer. The general format of the House of Quality consists of six components: - Customer requirements (HOWs) listing the requirements derived from customer statements. - Technical requirements (WHATs) comprising relevant and measurable product characteristics. - Planning matrix illustrating customer perceptions...
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...| UNIVERSITY OF WATERLOOFaculty of Engineering | | Steering Wheel Vibration Warranty Reduction The Development of a Shimmy Quality Gate Honda of Canada, Manufacturing Alliston, Ontario Prepared by Timothy Chak ID# 20132585 3B Mechanical Engineering September 17, 2007 4700 Tottenham Rd Alliston, ON L9R 1A2 September 17, 2007 Prof. Roydon A. Fraser Associate Chair Undergraduate Studies Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo, Ontario N2L 3G1 Dear Prof. Fraser: This report entitled, “Steering Wheel Vibration Warranty Reduction,” was prepared as my 3B Work Report for Honda of Canada, Mfg. This is my fourth work term report and the first one that I have prepared for Honda. The purpose of this report is to determine the required equipment and parameters to increase detection for steering wheel vibration, with a focus on the Acura MDX. Honda Motor Co. is the fourth largest automaker in the world, with cars in its line-up such as Canada’s best-selling Honda Civic and the Honda Accord. Including the vehicles in its luxury brand, Acura, Honda sells 15 different cars and trucks in Canada. The Honda Civic, Honda Ridgeline, and Acura MDX are all made on the same assembly line in HCM plant 2 in Alliston. Ali Woodley manages the vehicle quality department, in which I was employed. For my project, however, I worked under Mike Kueneman, who is the group leader of the vehicle quality analysis group...
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...the machine which is under consideration. Rolling element bearing is an indispensable part of any machine which finds widespread domestic and industrial applications. Different methods are used for detection and diagnosis of the bearing defects. This research is intended as a tutorial overview of bearing fault detection using vibration analysis. The advent of the microprocessor has enormously advanced the process of vibration data acquisition and analysis in recent years. Measurement that took hours only two decades ago can now be completed in minutes and better decisions made because of better data acquisition and presentation. However, the basic process of measurement and analysis have remained essentially unchanged, just like the machines from which vibrations is measured. The results of the measurement and data analysis need to be compared with known standards or guidelines and decisions made as to whether the machine is acceptable for service or maintenance should be planned. Increasingly these processes are being handled electronically but we are still a long way from replacing the fundamental knowledge and experience of the vibration analyst. Vibration is not the only factor instrumental in fault detection. Noise and temperature can also play key role when it comes to fault detection in bearing. There are certain...
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...Licensed to Coventry University Licensed from the SAE Digital Library Copyright 2010 SAE International E-mailing, copying and internet posting are prohibited Downloaded Friday, October 22, 2010 6:54:13 AM SAE TECHNICAL PAPER SERIES 2007-01-2320 Validation of Vehicle NVH Performance using Experimental Modal Testing and In-Vehicle Dynamic Measurements Jennifer M. Headley, Kuang-Jen J. Liu and Robert M. Shaver DaimlerChrysler Corporation Noise and Vibration Conference and Exhibition St. Charles, Illinois May 15-17, 2007 400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-0790 Web: www.sae.org Author:Gilligan-SID:4494-GUID:38672946-193.61.107.151 Licensed to Coventry University Licensed from the SAE Digital Library Copyright 2010 SAE International E-mailing, copying and internet posting are prohibited Downloaded Friday, October 22, 2010 6:54:13 AM The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE's peer review process under the supervision of the session organizer. This process requires a minimum of three (3) reviews by industry experts. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. For permission and licensing requests contact: SAE Permissions 400 Commonwealth Drive...
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...Introduction All system which possessing mass and elasticity are capable of undergoing free vibration. The main interest of such system is the natural frequency of the vibration. Natural frequencies are a function of system stiffness and mass. Generally, all real systems have infinite number of natural frequencies. Resonance, large vibration, will occur in a system when the forcing frequency of the system is equal to one of the natural frequencies. Generally, vibration is a form of wasted energy and normally is undesirable is most cases. It generates noise, instability and will consequently lead to system break down which is a disastrous effect. This project studies a model vibration of a four-cylinder engine which is mounted on a cantilever. This system can be modeled as a mass spring system so that the vibration of the system can be studied. These vibrations are mainly due to the unbalance of primary or secondary forces and couples. 1. Background The model engine consists of four cylinders mounted of a crank shaft with different crank phase angles. A DC motor with a variable speed control drives the shaft and makes the four-cylinder to rotate. The shaft is rotating at a constant angular speed, however, producing an acceleration on the pistons. Hence there are some inertia forces acting on the crank shaft due to these accelerations. The relative crank phase angles of the four cylinders can be adjusted by loosen three Allan screws...
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...| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Revision / Change Record | Table of Contents | 1. Introduction 3 2. Lessons-learned 3 2.1. Lessons-learned From Assembly 3 2.1.1. <각각 서브시스템 추가> 3 2.2. Lessons-learned From Integration 3 2.2.1. <각각 서브시스템 추가> 3 2.3. Lessons-learned From Test 3 2.3.1. Thermal Vibration Test 3 2.3.1.1. <각각 서브시스템 추가> 3 2.3.2. Vibration Test 3 2.3.2.1. <각각 서브시스템 추가> 3 3. Check Table for the modification(Lessons-learned) 3 3.1. <각각 서브시스템 추가> 3 4. Conclusion 3 Introduction Lessons-learned Lessons-learned From Assembly <각각 서브시스템 추가> CS 1.1.1.1. MHX 2420 헤더핀 접촉 문제 STU로 사용되는 MHX 2420에 Header pin이 부착 되어있는데 현재상태로 조립하면 접촉문제는 없다. 하지만 UTU와 몰렉스로 연결하기 위해서 Header pin과 연결하면 Header pin이 길어지기 때문에 접촉 위험이 있다. 때문에 부착되어도 늘어나지 않도록 반대방향으로 몰렉스의 선과 Header pin과 연결하여 수축튜브로 마감하는 방식으로 문제를 해결하였다. * 1.1.1.2. RFM12BP 헤더핀 길이 문제 UTU의 송신 모듈인 RFM12BP를 부착 시키기 위해 UTU 보드에 2mm pitch Header pin을 부착 시켜 연결시킨다. MTQ와의 접촉은 고려되어 접촉 되지 않지만 IRC지지 프레임과 접촉 위험이 있다. 때문에...
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...Falling Hazards The most common injuries workers suffer from falling objects are bruises, fractures, strains, and sprains. The objects that commonly fall range from large items such as roof trusses and steel beams to small items such as fasteners and small hand tools. Introduction: Hand tools include a wide variety of non-powered devices such as wrenches, pliers, hammers, and screwdrivers. These tools may seem harmless, but they are the cause of many injuries. The following is a summary of safety practices related to hand tools. General Hazards: • The two most common hazards associated with the use of hand tools are misuse and improper maintenance. • Misuse occurs when a hand tool is used for something other than its intended purpose. (An example would be using a screwdriver as a chisel. This may cause the tip to break and strike someone). • Improper maintenance allows hand tools to deteriorate into an unsafe condition. (Examples would include cracked wooden handles that allow the tool head to fly off or mushroomed heads that can shatter upon impact). • Specially designed tools may be needed in hazardous environments. (Always use non-sparking tools in the presence of flammable vapors or dusts. Insulated tools with appropriate ratings must be used for electrical work). Cause of health hazards · Static load Static load or effort occurs when muscles are kept tense and motionless. Examples of static effort include holding the arms elevated (Figure 1a), or...
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...ME 3456 Technical memorandum Report to: | TA | from: | HN, 3.36 | subject: | Vibration due to rotational Unbalance | date: | 3/27/2014 | Date Submitted: | 4/20/2014 | | | Introduction This experiment was conducted in order to study the relationship between rotational unbalance and , the basic attributes of a rotational system. This involves determining equivalent rotational quantities such as deflection, natural frequency, stiffness, moment of inertia, equivalent damping constant, logarithmic decrement and other attributes of this rotational system to determine the effect of rotational unbalance on a larger mass system. The experiment involved use of a bar fixed at one end, with suspension by a spring in the vicinity of the opposite end, as well as a dashpot to remove energy from the system. The aim of the investigation is to determine the relationship between the voltage, frequency, and amplitude in relation to the natural and damped frequencies: especially in terms of approaching and leaving the resonance. Equipment Description Equipment used included: I. Vibrating beam apparatus (in diagram, A-D) II. Power supply (2) III. Motor with power supply (C, G) IV. Contact tachometer (to measure rpm) V. LVDT (linear variable differential transformer) with voltage source from power supply (F, I) VI. Oscilloscope (H) VII. Fixed Mass of 500g (E) The LVDT measured the motion of the beam end with a range of ±2 inches. The voltage source...
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...DEVELOPMENT OF SOFTWARE FOR BLAST VIBRATION ANALYSIS IN PARTIAL FULFILLMENT OF THE REQUIREMENTS OF THE DEGREE OF BACHELOR OF ENGINEERING IN MINNING ENGINEERING By DINABANDHU BAG Under the Guidance of Prof. N.K.Patnaik and Prof. Pradeep Sharma National Institute of Technology Rourkela 1994 Ground vibration from blasting is an undesirable but inevitable side effect of the use of explosives. High intensity of ground vibration can induce extensive structural damage and cause human psychological discomfort. The PPV has been widely accepted as a measure to assess the damage potential of blasting. This project deals with the significance of the dominant frequency content of the blast waves. The frequency range of waves against the power associated gives a bettwr picture of the blast vibration analysis. The input data of the blast event utilized in this project was collected by blasting carried out in a meteliaferrous mines. ACKNOWLEDGEMENTS I am thankful to all those who directly or indirectly helped me complete this project. I am grateful to the mining organization, who made us available their blast vibration data. I am thankful to my project supervisor Prof. N.K.Patnaik and Pradeep Sharma who provided me the necessary guidance and inspired me to learn from them to finish this analysis successfully. a open cast metalliferous mines. TABLE OF CONTENTS NUMBER 1 2 3 4 5 6 7 CONTENTS DESCRIPTION INTRODUCTION BLAST WAVES AND VIBRATION ANALYSIS FREQUENCY SPECTRA...
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...in the early 1970’s. Today, impact testing (or bump testing) has become widespread as a fast and economical means of finding the modes of vibration of a machine or structure. Contents TITLE PAGE NO. Nomenclature………………………………………………………………………………………………………………………………… CHAPTER 1: Introduction………………………………………………………………………………………………………………………………….. CHAPTER 2: Experiment setup……………………………………………………………………………………………………………………….. FRF Calculations……………………………………………………………………………………………………………………………. CHAPTER 3: Results………………………………………………………………………………………………………………………………………….. Conclusion…………………………………………………………………………………………………………………………………….. References…………………………………………………………………………………………………………………………………… Appendices Computer program………………………………………………………………………………………………………………………. CHAPTER 1: Introduction: Modes are used as a simple and efficient means of characterizing resonant vibration. The majority of structures can be made to resonate. That is, under the proper conditions, a structure can be made to vibrate with excessive, sustained, oscillatory motion. Resonant vibration is caused by an interaction between the inertial and elastic properties of the materials within a structure. Resonant vibration is often the cause of, or at least a...
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...gravity is unknown, gravity is just this mysterious force that exerts itself on universal and atomic scales. We understand what it does but we don’t understand what makes it happen. Throughout my studies I have come across a consistent that I believe needs to be examined and that is, not only a correlation between the geometric patterns found in multi-year planetary orbits and those found when studying Cymatics but also the correlation of those to the orbital patterns of electrons around their nucleus on the atomic level. You may be asking yourself what exactly is Cymatics, or even perhaps what is this lunatic talking about? To begin to answer these questions I will describe Cymatics first. Cymatics is the study of visible sound and vibration, a subset of modal phenomena. Typically the surface of a plate, diaphragm, or membrane is vibrated, and regions of maximum and minimum displacement are made visible in a thin coating of particles, paste, or liquid. Different patterns emerge in the exitatory medium depending on the geometry of the plate and the driving frequency. (Hans, 2001) In short it is making shapes with sounds. Below I have included a picture of some of the geometric patterns observed through Cymatics (see figure 1) as well as pictures of electron orbits (figure 2 and 3 ) and multi-year orbital patterns of some planets. (figures 4, 5, 6, and 7) As you can see upon first examination of...
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...| 3/5/2012 | | Mechanical Engineering Dynamics lab report.UFMEWL-10-2Vassos Tapakoudes | AIR TRACK Executive summary Demonstrate the patterns and relationships that stiffness and resonant frequencies follow under different circumstances on an air track. Stiffness is a measure of the resistance of a material to deformation under applied force. Resonant frequencies are the frequencies that a system appears to oscillate at greater amplitudes. Content Introduction pg.2 Theoretical calculations and background information pg.2 Experimental design and procedure pg.4 Analysis result and conclusion pg.7 Reflection to other experiment pg.9 Introduction The purpose of this dynamic Lab is to measure the stiffness and resonant frequencies of a coupled oscillator on an air track. Four experiments will be taken in order to see the behaviour and performance of the rubbers connecting the trolleys. Calculate theoretical results by using background information. Comparisons of theoretical and experimental results will be done to see errors and find conclusions. Resonant frequencies are the frequencies that a system oscillates at greater amplitudes. This type of oscillations is what makes systems to vibrate many times. On the other hand, stiffness is a measurement of the ability a material have to extend without deformation. Low stiffness can result in failure of a system and high stiffness is required in the design of systems that deformation...
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...driving * Quarrying * Fast moving traffic including landing aircraft * Wind * Loading due to wave action of water * Etc * The nature of each of these loads is quite different from the nature of the loads in the other cases. * Earthquakes constitute the single most important source of dynamic loads on structures and foundation. * Every earth quake is associated with a certain amount of energy released at its source and can be assigned a magnitude (m) which is just a number. * Table gives an idea of the energy associated with a particular magnitude M (Richter) | 5.0 | 6.0 | 6.33 | 6.5 | 7.0 | 7.5 | 8.0 | 8.6 | E (1020ergs) | 0.08 | 2.5 | 8.00 | 14.1 | 80 | 446 | 2500 | 20000 | Earthquake: The vibration of earth that accompanies an earthquake is one of the most terrifying natural phenomena known. From geological point of view, earthquakes provide the evidences of the instability of the earth’s crust and a logical starting...
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...of engineering that studies the lateral and torsional vibrations of rotating shafts, with the objective of predicting the rotor vibrations and containing the vibration level under an acceptable limit. The principal components of a rotor-dynamic system are the shaft or rotor with disk, the bearings, and the seals. The shaft or rotor is the rotating component of the system. Many industrial applications have flexible rotors, where the shaft is designed in a relatively long and thin geometry to maximize the space available for components such as impellers and seals. Additionally, machines are operated at high rotor speeds in order to maximize the power output. The first recorded supercritical machine (operating above first critical speed or resonance mode) was a steam turbine manufactured by Gustav Delaval in 1883. Modern high performance machines normally operates above the first critical speed, generally considered to be the most important mode in the system, although they still avoid continuous operating at or near the critical speeds. Maintaining a critical speed margin of 15 % between the operating speed and the nearest critical speed is a common practice in industrial applications. The other two of the main components of rotor-dynamic systems are the bearings and the seals. The bearings support the rotating components of the system and provide the additional damping needed to stabilize the system and contain the rotor vibration. Seals, on the other hand, prevent undesired leakage...
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