An Optimal Multivariable Controller With Application to Steam Temperature Control in a Boiler

[+] Author and Article Information
B. W. Surgenor, J. K. Pieper

Department of Mechanical Engineering, Queen’s University, Kingston, Ontario, Canada

J. Dyn. Sys., Meas., Control 114(4), 733-736 (Dec 01, 1992) (4 pages) doi:10.1115/1.2897751 History: Received March 17, 1989; Revised February 01, 1992; Online March 17, 2008


An optimal multivariable controller has been designed for superheater steam temperature control in a drum boiler. The controller takes the form of a linear quadratic regulator with supplementary states for added integral action. By means of a nonlinear model of the power plant, the performance of the controller is compared with that of the existing plant control system which consists of a set of PI controllers with feedforward action. The simulation results indicate that the superior performance of the digital controller justifies the expense of a control system retrofit.

Copyright © 1992 by The American Society of Mechanical Engineers
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