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RESEARCH PAPERS

An Equivalent Linearization Algorithm for Nonlinear System Limit Cycle Analysis

[+] Author and Article Information
S. G. Abel

Garrett Pneumatic Systems Division, Phoenix, AZ 85034

N. K. Cooperrider

Failure Analysis Associates, Phoenix, AZ 85027

J. Dyn. Sys., Meas., Control 107(2), 117-122 (Jun 01, 1985) (6 pages) doi:10.1115/1.3149682 History: Received March 07, 1985; Online July 21, 2009

Abstract

An approach for determining the characteristics of limit cycles in higher order systems with multiple nonlinearities is described. This method utilizes sinusoidal input describing functions to convert the nonlinear problem to an eigenvalue problem. A search procedure employing eigenvalue derivatives finds limit cycle conditions, when they exist. This technique is relatively efficient and reliable and able to treat problems with strong nonlinearities such as Coulomb friction or relays. Two applications are presented, a mechanical servo positioner system and a railway bogie dynamics problem. Comparison of results with simulation is made.

Copyright © 1985 by ASME
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