This work examines how friction-induced oscillations in a traditional mass-on-a-moving-belt system are affected by high-frequency excitations, commonly referred to as dither signals. Two different friction laws are considered: a Stribeck friction law governed by a relationship that is cubic in the slip velocity, and an exponentially-based friction law that steadily decreases with slip velocity. Although in both cases the friction force has an initial negative slope versus relative velocity, their stability characteristics are quite different. In particular, it is shown that tangential dither can either stabilize or destabilize an initially stable system, depending on the nature of the friction law, and on other system and dither parameters. The behavior of the systems is studied through use of an averaging technique and through direct numerical simulation. The numerical study validates the stability predictions from the averaging method, and quantifies the partial-cancellation performance of tangential dither.
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July 2007
Research Papers
Effect of Tangential Dither Signal on Friction Induced Oscillations in an SDOF Model
Michael A. Michaux,
Michael A. Michaux
School of Mechanical Engineering,
The Georgia Institute of Technology
, Atlanta, GA 30332-0405
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Aldo A. Ferri,
Aldo A. Ferri
School of Mechanical Engineering,
The Georgia Institute of Technology
, Atlanta, GA 30332-0405
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Kenneth A. Cunefare
Kenneth A. Cunefare
School of Mechanical Engineering,
The Georgia Institute of Technology
, Atlanta, GA 30332-0405
Search for other works by this author on:
Michael A. Michaux
School of Mechanical Engineering,
The Georgia Institute of Technology
, Atlanta, GA 30332-0405
Aldo A. Ferri
School of Mechanical Engineering,
The Georgia Institute of Technology
, Atlanta, GA 30332-0405
Kenneth A. Cunefare
School of Mechanical Engineering,
The Georgia Institute of Technology
, Atlanta, GA 30332-0405J. Comput. Nonlinear Dynam. Jul 2007, 2(3): 201-210 (10 pages)
Published Online: February 12, 2007
Article history
Received:
July 20, 2005
Revised:
February 12, 2007
Citation
Michaux, M. A., Ferri, A. A., and Cunefare, K. A. (February 12, 2007). "Effect of Tangential Dither Signal on Friction Induced Oscillations in an SDOF Model." ASME. J. Comput. Nonlinear Dynam. July 2007; 2(3): 201–210. https://doi.org/10.1115/1.2727486
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