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RESEARCH PAPERS

Nonlinear Dynamics of an Electrohydraulic Flapper Nozzle Valve

[+] Author and Article Information
Chong-Jer Liaw

Gull Inc., Smithtown, NY 11787

F. T. Brown

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015

J. Dyn. Sys., Meas., Control 112(2), 298-304 (Jun 01, 1990) (7 pages) doi:10.1115/1.2896139 History: Received November 26, 1986; Revised August 20, 1989; Online March 17, 2008

Abstract

A nonlinear model of an electrohydraulic flapper-nozzle valve is developed, using an energy-based approach. Nonlinearities are found in the resistances, compliances, and the inertances; the latter produce state-dependent coupling terms. The model is applied to a valve designed for pulse-width modulation (PWM). Most model parameters are derived from a priori design parameters, but some were found from a series of experiments which also served to confirm the model. The valve and its model responded satisfactorily to PWM signals up to 500 Hz.

Copyright © 1990 by The American Society of Mechanical Engineers
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