Mixed Method of Routh and ISE Criterion Approaches for Reduced-Order Modeling of Continuous-Time Systems

[+] Author and Article Information
Chyi Hwang

Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, 700, The Republic of China

J. Dyn. Sys., Meas., Control 106(4), 353-356 (Dec 01, 1984) (4 pages) doi:10.1115/1.3140697 History: Received October 22, 1984; Online July 21, 2009


A mixed method using the advantages of Routh approximation method and integral-squared-error criterion is proposed for obtaining stable reduced-order models for high-order continuous-time systems. The reduced-order model tends to approximate the transient portion of the system response in the sense of minimum mean-squared-error, while the steady-state portion is matched exactly. Instead of actually evaluating time responses of the system and the reduced-order model, a matrix formula is used to calculate the integral-squared-error from the error transfer function.

Copyright © 1984 by ASME
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