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Model-based control of unstable, non-minimum-phase, nonlinear processes
Conference proceeding

Model-based control of unstable, non-minimum-phase, nonlinear processes

C Panjapornpon, M Soroush, W.D Seider and IEEE
42nd IEEE International Conference on Decision and Control (IEEE Cat. No.03CH37475), v 6, pp 6151-6156 Vol.6
2003

Abstract

Centralized control Chemical engineering Chemical reactors Control system synthesis Control systems Linear approximation Nonlinear control systems Solid modeling State feedback Steady-state
A model-based control system is presented for nonlinear unconstrained processes. It is applicable to stable and unstable processes, whether non-minimum- or minimum-phase. The control system includes a nonlinear state feedback and a reduced-order nonlinear state observer. The state feedback induces an approximately linear response to state variables of the process. The state feedback is derived by solving a continuous-time moving-horizon optimization problem. The application and performance of the control system are shown by implementing it on a chemical reactor with multiple steady states. The control system is used to operate the reactor at one of the steady states, which is unstable and non-minimum-phase. The simulation results show that the closed-loop system is globally asymptotically stable.

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Automation & Control Systems
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