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RESEARCH PAPERS

Adaptive Pneumatic Force Actuation and Position Control

[+] Author and Article Information
J. E. Bobrow, F. Jabbari

Department of Mechanical Engineering, University of California, Irvine, Irvine, Calif. 92717

J. Dyn. Sys., Meas., Control 113(2), 267-272 (Jun 01, 1991) (6 pages) doi:10.1115/1.2896374 History: Received September 23, 1988; Online March 17, 2008

Abstract

In this paper an implementation of an adaptive control law for a pneumatic actuator is presented. Pneumatic actuators are of particular interest for robotic applications because of their large force output per unit weight, and their low cost. Stabilization of a pneumatic actuator is difficult if a high bandwidth closed-loop system is desired. This is because of the compressibility of air, and of the nonlinear characteristics of air flowing through a variable area orifice. Further complications arise from the geometry of the mechanism because the equations of motion are highly nonlinear. The order of the dominant dynamics is shown to vary with the position of the mechanicsm.

Copyright © 1991 by The American Society of Mechanical Engineers
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