文档介绍：IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 10, NO. 5, SEPTEMBER 2002 735
Multivariable Robust Controller Design for a Boiler System
Wen Tan, Horacio J. Marquez, and Tongwen Chen
Abstract—In an industrial boiler system, multiloop (decen-
tralized) proportional-integral (PI) control is used because of its
implementational advantages. We show that such control schemes
sacrifice robustness and performance of the overall system. In
particular, under normal boiler operating conditions, we de-
sign a robust multivariable controller using loop-shaping
techniques; for consideration in implementation, we then reduce
this controller to a multivariable PI controller. Both the
controller and its PI approximation are tested extensively in
the frequency domain as well as in the time domain, using a
complex nonlinear simulation software; the results show that the
designed controllers are superior in robustness and performance
to the existing multiloop controller.
Index Terms—Boiler systems, control applications, controller
reduction, optimization, loop shaping, robust control.
I. INTRODUCTION
NDUSTRIAL cogeneration systems invariably present Fig. 1. A simple diagram for the Syncrude utility plant.
I a challenge to control system designers. The Syncrude
Canada, Ltd. (SCL) integrated energy facility located in Mil-
dred Lake, Alberta, utilizes plex header s