On Selecting Low Order Discrete-Time Modes Based on Dominant Energy Modes

[+] Author and Article Information
M. Ouyang

Department of Nuclear Engineering, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.

C. M. Liaw, C. T. Pan

Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.

J. Dyn. Sys., Meas., Control 108(2), 154-156 (Jun 01, 1986) (3 pages) doi:10.1115/1.3143759 History: Received March 17, 1986; Online July 21, 2009


This brief proposes a simple criterion for selecting low order modes of discrete multivariable systems for model reduction. From the view point of power spectrum of the system output, the dynamic modes with dominant energy contributions instead of those with dominant eigenvalues will be retained. By using this criterion a simple model reduction procedure is developed. One advantage of this reduction technique is that the stability of the original system is preserved.

Copyright © 1986 by ASME
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