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RESEARCH PAPERS

Analytic Loop Shaping Methods in Quantitative Feedback Theory

[+] Author and Article Information
D. F. Thompson

Ford Motor Company, Transmission and Chassis Operations, Livonia, MI 48150

O. D. I. Nwokah

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288

J. Dyn. Sys., Meas., Control 116(2), 169-177 (Jun 01, 1994) (9 pages) doi:10.1115/1.2899208 History: Received August 16, 1990; Revised April 23, 1993; Online March 17, 2008

Abstract

Quantitative Feedback Theory (QFT), a robust control design method introduced by Horowitz, has been shown to be useful in many cases of multi-input, multi-output (MIMO) parametrically uncertain systems. Prominent is the capability for direct design to closed-loop frequency response specifications. In this paper, the theory and development of optimization-based algorithms for design of minimum-gain controllers is presented, including an illustrative example. Since MIMO QFT design is reduced to a series of equivalent single-input, single-output (SISO) designs, the emphasis is on the SISO case.

Copyright © 1994 by The American Society of Mechanical Engineers
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