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RESEARCH PAPERS

Stationary Response of States-Constrained Nonlinear Systems Under Stochastic Parametric and External Excitations

[+] Author and Article Information
R. J. Chang

Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 70101

J. Dyn. Sys., Meas., Control 113(4), 575-581 (Dec 01, 1991) (7 pages) doi:10.1115/1.2896460 History: Received September 19, 1989; Revised October 16, 1990; Online March 17, 2008

Abstract

A Fourier-series closure scheme is developed for the prediction of the stationary stochastic response of a stochastic parametrically and externally excited oscillator with a nonpolynomial type nonlinearity and under states constraint. The technique is implemented by deriving the moment relations and employing the Fourier series as the expansion of a non-Gaussian density for constructing and solving a set of algebraic equations with unknown Fourier coefficients. A single-arm robot manipulator operated in a constrained working space and subjected to parametric and/ or external noise excitations is selected to illustrate the present approach. The validity of the present scheme is further supported by some exact solutions and Monte Carlo simulations.

Copyright © 1991 by The American Society of Mechanical Engineers
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