Kinematics and Dynamics of Machinery (3rd Edition) - Hardcover

Wilson, Charles E.; Sadler, J. Peter

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9780201350999: Kinematics and Dynamics of Machinery (3rd Edition)

Hardcover

ISBN 10: 0201350998 ISBN 13: 9780201350999

Publisher: Pearson, 2003

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Kinematics and Dynamics of Machinery teaches readers how to analyze the motion of machines and mechanisms. Coverage of a broad range of machines and mechanisms with practical applications given top consideration. Mechanisms and Machines. Motion in Machinery. Velocity Analysis of Mechanisms. Acceleration Analysis of Mechanisms. Cams. Spur Gears. Helical, Worm, and Bevel Gears. Drive Trains. Static-Force Analysis. Dynamic-Force Analysis. Synthesis. Introduction to Robotic Manipulators.

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About the Author:

Charles E. Wilson is a Professor with the Department of Mechanical Engineering, New Jersey Institute of Technology. He received the B.S. and M.S. degrees in mechanical engineering from the Newark College of Engineering, the M.S. in engineering mechanics from New York University, and the Ph.D. degree in mechanical engineering from Brooklyn Polytechnic Institute. He is a licensed professional engineer, and has been awarded fellowships by the National Aeronautics and Space Administration, Department of Energy and National Science Foundation.

Dr. Wilson has published papers in a number of journals and transactions. Textbooks he has authored and co-authored are widely used in the United States and Canada. English language versions are also published in Britain, Taiwan, India, and the Philippines, and translations are published in Korea and Mexico.

Dr. Wilson served as a U.S. Air Force electronics and armament officer, and as an engineer and consultant for a number of companies. He is often called on to investigate functional and design problems in vehicles, machinery, and consumer products. He has investigated and given expert testimony on auto, truck, bus, and ambulance accidents, and accidents involving elevators, hydraulic presses, welds, playground equipment, garden equipment, and truck-mounted machinery.

J. Peter Sadler is a Professor with the Department of Mechanical Engineering, University of Kentucky. He has previously held faculty positions at the State University of New York at Buffalo and the University of North Dakota. He received the B.S.M.E, M.S.M.E., and Ph.D. degrees from Rensselaer Polytechnic Institute.

Dr. Sadler is a registered professional engineer and a member of many technical societies. He served as Editor for dynamics for the Journal of Mechanism and Machine Theory and Associate Editor of the Journal of Applied Mechanics and Robotics.

Dr. Sadler holds a U.S. patent related to predicting optimum machining coditions. His industrial projects and research include kinematics and dynamics, robotics, computer aided design, engineering optimization, and "lean" manufacturing.

What Abilities Define an Engineer?

Part of the answer is given by the program outcomes and assessment criteria of the Accreditation Board for Engineering and Technology'. Engineering programs must demonstrate that their graduates have specific abilities. These include:

an ability to apply knowledge of mathematics, science, and engineering
an ability to analyze and interpret data
an ability to design a system, component, or process to meet desired needs
an ability to identify, formulate, and solve engineering problems
an ability to communicate effectively
an ability to use techniques, skills, and modern engineering tools necessary for engineering practice.

Goals of the Text

A course in the kinematics and dynamics of machinery provides many opportunities to develop the abilities listed above. This text is designed to help foster development and application of those skills. One goal is to develop the ability of students to formulate and solve problems in the kinematics and dynamics of machinery. Engineering tools used to achieve this goal include motion simulation software and general-purpose mathematical software. These tools relieve the designer of repetitive tasks and provide a powerful means of communicating results through graphs and animation simulations. An equally important goal is the development of an understanding of the implications of computed results. That is, what do the results mean; how can we improve the design? Knowledge gained in previous courses is reinforced when applied to problems in the kinematics and dynamics of machinery. For example, matrix methods become meaningful when applied to equations describing velocities and accelerations in a spatial linkage. The skills learned and sharpened in studying the kinematics and dynamics of machinery are carried forward, even to unrelated courses and to engineering practice.

Scope

The coverage of this text includes mechanisms and machines, basic concepts; motion in machinery; velocity and acceleration analysis of mechanisms; design and analysis of cams, gears, and drive trains; static and dynamic force analysis; synthesis; and an introduction to robotic manipulators. Practical applications are considered throughout the text. Example problems and homework problems involve engineering design and provide a basis for design courses to follow. Analytical and graphical vector methods are illustrated, as well as complex number methods.

The text illustrates the use of motion simulation software, mathematics software, and user-written programs to solve problem and to present the results in plotted or tabulated form.

There are also many problems that can be solved by "hand calculations," however, using only a scientific calculator and/or simple drafting tools. The latter group may be useful as short practice problems and examination problems when laptop computers are unavailable.

What's New in the Third Edition?

The text was updated throughout. A few of the changes and additions include:

A list of "Concepts you will learn and apply . . . ." for each chapter.
Chapter summaries
Review and discussion items for each chapter
Thorough revision of the material on cam design, including application of step and interval functions, and higher order polynomials for cam design.
Practical design implications of results Gear train diagnostics based on noise and vibration frequencies
Updates, example problems and homework using motion simulation software Updates example problems and homework problems using mathematics software throughout the text.
Other updates for clarity and brevity
Suggestions for "working smart," particularly with computers. Emphasis on computer-aided matrix solutions where appropriate
Interpretation and assessment of results. Is it logical? Does it check? Let's compare results with another solution. What does it mean? What does the graph show?
Practical design implications of results

Course Development

Professors who regularly teach the kinematics and dynamics of machinery will know what topics suit their students best. This note is for instructors who have not taught the course recently.

Most of the topics in this text can be covered in a three-credit-hour course given to engineering students who have completed a course in the statics and dynamics of rigid bodies. But a single course designed around the entire book would be likely to have insufficient depth. Instructors may decide to cover the parts of the text that they deem essential, and then select additional topics and solution methods according to goals set for their students. For example, either analytical vector methods or complex number methods may be used as a basis for writing computer programs to solve planar linkages. However, if analysis of spatial linkages is to follow analysis of planar linkages, then vector methods might be used for both.

For courses built around the use of motion simulation software and mathematics software, graphical methods are likely to be de-emphasized. For example, the velocity polygon might be used only to spot check a detailed analytical velocity analysis of a planar linkage. In a course concerning the kinematics and dynamics of machinery, uniformity of course content is not essential. Differences in emphasis and methods among university engineering departments may strengthen the "gene pool" of future engineers.

We have attempted to provide sufficient rigor and advanced material to challenge the student and provide a basis for further study. Student creativity may be fostered by the demands of the task, particularly if a few homework problems are expanded into open-ended design-type projects. Additional projects requiring creativity may be suggested by articles in technical publications or by an instructor's current research and consulting.

Disclaimer

The kinematics and dynamics of machinery and the design of mechanisms involve modeling of physical systems. Relationships so developed have limits of applicability. The user of this text is urged to interpret the results of calculations, rather than simply obtain problem solutions. It is the reader's responsibility to assess formulas and methods to determine their applicability to a particular situation. Although the publisher, the reviewers, and the authors have made every effort to ensure accuracy, errors invariably creep in. Suggestions and corrections are most welcome.

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