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TECHNICAL BRIEFS

A Simple Procedure for Modifying High-Speed Cam Profiles for Vibration Reduction

[+] Author and Article Information
Ulf Andresen, William Singhose

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

J. Mech. Des 126(6), 1105-1108 (Feb 14, 2005) (4 pages) doi:10.1115/1.1798231 History: Received May 31, 2003; Revised February 01, 2004; Online February 14, 2005
Copyright © 2004 by ASME
Topics: Vibration , Design
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References

Chew,  M., and Chuang,  C. H., 1995, “Minimizing Residual Vibrations in High-Speed Cam-Follower Systems Over a Range of Speeds,” J. Mech. Des., 117, pp. 166–172.
Chen, F. Y., 1982, Mechanics and Design of Cam Mechanisms, Pergamon, New York.
Dresner,  T. L., and Barkan,  P., 1995, “New Methods for the Dynamic Analysis of Flexible Single-Input and Multi-Input Cam-Follower Systems,” J. Mech. Des., 117, pp. 150–155.
Kwakernaak,  H., and Smith,  J., 1968, “Minimum Vibration Cam Profiles,” J. Mech. Eng. Sci., 10, pp. 219–227.
Wiederrich, J. L., and Roth, B., 1974, “Design of Low Vibration Cam Profiles,” presented at Conference on Cams and Cam Mechanisms, Liverpool, England.
Wiederrich,  J. L., 1981, “Residual Vibration Criteria Applied to Multiple Degree of Freedom Cam Followers,” ASME J. Mech. Des., 103, pp. 702–705.
Yan,  H., Yao,  Y., and Zhang,  C., 2003, “A Variable-Speed Method for Reduc-ing Residual Vibrations in Elastic Cam-Follower Systems,” J. Dyn. Syst., Meas., Control, 125, pp. 480–482.
Avsec,  J., and Marcic,  M., 2002, “Valve Gear Refinement,” J. Mech. Des., 124, pp. 86–90.
Singhose,  W., Seering,  W., and Singer,  N., 1994, “Residual Vibration Reduction Using Vector Diagrams to Generate Shaped Inputs,” ASME J. Mech. Des., 116, pp. 654–659.
Singer,  N. C., and Seering,  W. P., 1990, “Preshaping Command Inputs to Reduce System Vibration,” J. Dyn. Syst., Meas., Control, 112, pp. 76–82.
Rothbart, H., 1956, Cams: Design, Dynamics, and Accuracy, Wiley, New York.
Smith,  O. J. M., 1957, “Posicast Control of Damped Oscillatory Systems,” Proc. IRE, 45, pp. 1249–1255.
Singhose, W. E., Seering, W. P., and Singer, N. C., 1996, “Input Shaping for Vibration Reduction with Specified Insensitivity to Modeling Errors,” presented at Japan-USA Sym. on Flexible Automation, Boston, MA.
Tsay,  D. M., Ho,  H. C., and Wang,  K. C., 2002, “Design of Torque Balancing Cams for Globoidal Cam Index Mechanisms,” J. Mech. Des., 124, pp. 441–447.

Figures

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Cam and follower displacement
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The input shaping process
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Cam profiles at each of the three steps
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Response to standard 3-4-5 polynomial and input-shaped 3-4-5 polynomial
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Residual vibration amplitude from standard and shaped 3-4-5 polynomial at various speeds
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Experimental setup to evaluate cam profiles
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Standard 3-4-5 polynomial (left) and shaped (right) cams
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Vibration amplitude response to standard and input-shaped 3-4-5 polynomial profiles

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