Nonlinear Process Control Using a Direct Adaptive PI Controller

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Shih-Tien Peng¹  Chyi-Tsong Chen¹ 

[1] Department of Chemical Engineering, Feng Chia University

关键词: Direct Adaptive Control;    PI Controller;    Variable Structure;    Parameter Tuning Algorithm;    Lyapunov Approach;   

DOI  :  10.1252/jcej.11we218

来源: Maruzen Company Ltd

【 摘 要 】

References(20)Cited-By(1)This paper pertains to the direct adaptive Proportional–Integral (PI) control of nonlinear chemical processes. A simple yet effective PI controller parameter tuning algorithm, which has different structures separated by a defined zero-level set of process output errors, is derived. This algorithm enables a PI controller to control chemical processes in an interactive and autonomous way by simply observing the process output errors. To show the stability of the resultant PI control system, a rigorous analysis involving the use of a Lyapunov approach is presented. The effectiveness and applicability of the proposed direct adaptive PI control schemes are demonstrated by considering the control of a nonlinear continuous stirred tank reactor (CSTR) in the presence of a plant/model mismatch, an unmeasured disturbance, and parameter variations. Comparisons with several conventional PI controllers and an indirect adaptive Proportional–Integral–Derivative (PID) controller are performed for performance evaluation. Simulation results indicate that the proposed PI control scheme in associated with the derived parameter tuning algorithm is promising and that it offers flexibility and excellent capability for the direct adaptive control of nonlinear chemical processes.

【 授权许可】

Unknown