Design of Digital Feedforward/Preview Controllers for Processes With Predetermined Feedback Controllers

[+] Author and Article Information
Masayoshi Tomizuka, D. H. Fung

Department of Mechanical Engineering, University of California, Berkeley, Calif. 94720

J. Dyn. Sys., Meas., Control 102(4), 218-225 (Dec 01, 1980) (8 pages) doi:10.1115/1.3149606 History: Received July 08, 1980; Online July 21, 2009


This paper deals with the design of digital feedforward/preview (F/P) controllers for multi-input, multi-output processes with predetermined feedback controllers. The feedback controller is assumed to include an integral action which operates upon the error between setpoint and process output. The feedforward/preview controller is a weighted sum of previewed values of future disturbances. Formula for the F/P control gains are derived using a parameter optimization technique to minimize a quadratic cost criterion. Simulation examples are included to show some of the consequences of the developed design method.

Copyright © 1980 by ASME
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