Sing, Christoph and Postlethwaite, Bruce (1997) pH control: Handling nonlinearity and deadtime with fuzzy relational model-based control. IEE Proceedings Control Theory and Applications, 144 (3). pp. 263-268. ISSN 1350-2379Full text not available in this repository. (Request a copy from the Strathclyde author)
The application of fuzzy logic to the design of nonlinear controllers has become increasingly popular in recent years. Most of the developments have been in controllers of the rule-based type. An alternative approach, and one which reflects trends in conventional control, is to use fuzzy logic to build a process model, and then to incorporate this into a standard model-based controller scheme. The paper proposes the application of fuzzy relational models (FRMs) for the non-linear control of a pH process. The pH in both a simulated and a laboratory continuously stirred tank reactor (CSTR) was controlled by a model predictive controller (MPC), incorporating a fuzzy model created using a recently developed method of FRM identification. The controller performance is compared with that of a fuzzy rule-based controller, that of a PID controller and that of a linear MPC. The comparison shows the superiority of fuzzy relational model-based control (FRMBC) for highly nonlinear processes. The suitability of the FRMBC for real-world applications is demonstrated by its control performance on a laboratory-scale plant.
|Keywords:||control system synthesis, fuzzy control, model reference, adaptive control systems, nonlinear control systems, pH control, Chemical engineering, Instrumentation, Control and Systems Engineering, Electrical and Electronic Engineering|
|Subjects:||Technology > Chemical engineering|
|Department:||Faculty of Engineering > Chemical and Process Engineering|
|Depositing user:||Dr. Bruce Postlethwaite|
|Date Deposited:||29 Jun 2010 08:58|
|Last modified:||04 May 2016 16:38|