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TECHNICAL PAPERS

The Design of Quality Engineered Control Systems

[+] Author and Article Information
Osita D. I. Nwokah, Gemunu S. Happawana

Mechanical Engineering Department, Southern Methodist University, Dallas, TX 75275-0337

Daré Afolabi

Department of Mechanical Engineering, I.U.P.U.I., Indianapolis, IN 46202

J. Dyn. Sys., Meas., Control 121(4), 583-593 (Dec 01, 1999) (11 pages) doi:10.1115/1.2802520 History: Received March 17, 1997; Online December 03, 2007

Abstract

Every optimization based engineering design produces a performance metric which as a function of the tolerance parameters, is structurally stable but not generic. This can lead to a severe loss of performance (catastrophes) under a smooth change in the tolerance parameters. This paper gives an exposition of how norm based optimal control methods naturally lead to performance catastrophes, as well as an alternative systematic loop shaping design methodology which corrects the problem.

Copyright © 1999 by The American Society of Mechanical Engineers
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