Fractional describing function of systems with Coulomb friction

Duarte, Fernando B.; Machado, J. A. Tenreiro

http://hdl.handle.net/10400.22/4578

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Authors

Duarte, Fernando B.

Machado, J. A. Tenreiro

Abstract(s)

This paper studies the describing function (DF) of systems constituted by a mass subjected to nonlinear friction. The friction force is decomposed into two components, namely, the viscous and the Coulomb friction. The system dynamics is analyzed in the DF perspective revealing a fractional-order behavior. The reliability of the DF method is evaluated through the signal harmonic contents.