On the Linear Quadratic Optimal Systems Design in the Frequency Domain

[+] Author and Article Information
Chih-Min Lin, Tarn-Sea Lu

Department of Electrical Engineering, Yuan-Ze Institute of Technology, Chung-Li, Tao-Yuan 32026, Taiwan

J. Dyn. Sys., Meas., Control 119(3), 581-584 (Sep 01, 1997) (4 pages) doi:10.1115/1.2801299 History: Received February 01, 1994; Online December 03, 2007


By frequency-domain approach, a synthesis methodology of single-input-single-output optimal control system is developed to ensure closed-loop stability and to minimize a linear quadratic cost function. Furthermore, the equivalent two-degree-of-freedom system is designed so that the feedback-loop can satisfy the return difference equality, i.e., this system possesses the system performance with the optimal control sense and the stability margins properties as in time-domain approach LQR optimal systems. The F-4E flight control system is considered as the design example to illustrate the validity of the design method.

Copyright © 1997 by The American Society of Mechanical Engineers
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