Disturbance Rejection Through an External Model

[+] Author and Article Information
Masayoshi Tomizuka, Kok-Kia Chew, Wei-Chi Yang

Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Dyn. Sys., Meas., Control 112(4), 559-564 (Dec 01, 1990) (6 pages) doi:10.1115/1.2896180 History: Received March 18, 1988; Revised October 01, 1989; Online March 17, 2008


This paper considers the use of external models for the cancellation of disturbances that can be regarded as output of stable (in the sense of Lyapunov) autonomous systems. The external model is set up outside the feedback loop so that the design of the feedback controller is accomplished without favoring particular disturbances. External model controllers can, therefore, be add-on devices to existing control systems. An application to track-following in a disk-file actuator system is presented.

Copyright © 1990 by The American Society of Mechanical Engineers
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