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RESEARCH PAPERS

On Time Delay in Noncolocated Control of Flexible Mechanical Systems

[+] Author and Article Information
B. Yang

Department of Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1453

C. D. Mote

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

J. Dyn. Sys., Meas., Control 114(3), 409-415 (Sep 01, 1992) (7 pages) doi:10.1115/1.2897362 History: Received March 01, 1990; Revised October 01, 1991; Online March 17, 2008

Abstract

A new method is presented for noncolocated control of flexible mechanical systems. The destabilizing effect of noncolocation of sensors and actuators is eliminated through introduction of specific time delay block(s) in the control system. The time delay constants in those blocks depend on the system eigenstructure. For a given flexible mechanical system, if there exists a time delay relation, the system response at one point can be exactly predicted from the vibration measurement at other point(s) of the system. In this case all stabilizing controllers from colocated control can be directly used. The time delay theory is verified by experiments on noncolocated control of a translating string.

Copyright © 1992 by The American Society of Mechanical Engineers
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