A COMPARISON OF NONLINEAR CONTROL TECHNIQUES FOR CONTINUOUS STIRRED TANK REACTORS

被引:15
|
作者
SISTU, PB
BEQUETTE, BW
机构
[1] Department of Chemical Engineering Rensselaer Polytechnic Institute Troy
关键词
D O I
10.1016/0009-2509(92)87092-5
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Globally linearizing control, a differential geometry-based technique (continuous), and nonlinear predictive control, an optimization-based approach (discrete), are compared for temperature control of a classical exothermic CSTR. The two strategies can be tuned to have identical performance for setpoint changes or measured disturbances when there are no bounds on the manipulated variable. As the sample time is decreased, the two approaches also yield identical performance for unmeasured disturbances or uncertain models. However, NLPC performs better in the presence of constraints on the manipulated variable. An open-loop observer for the unmeasured state variable (composition) has been used. The system studied is minimum-phase, allowing a filtered deadbeat control law for the nonlinear predictive control strategy.
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页码:2553 / 2558
页数:6
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