Describing function of a simple mechanical system with non-linear friction

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

http://hdl.handle.net/10400.22/13381

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Authors

Duarte, Fernando B. M.

Tenreiro Machado, J. A.

Abstract(s)

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