An add-on type fuzzy controller for control system retrofit

Article type: Research Article

Authors: Chatterjee, A.^{; *} | Rakshit, A. | K. Ghoshal, T.

Affiliations: Electrical Engineering Department, Jadavpur University, Calcutta – 700 032, India

Correspondence: [*] Corresponding author. E-mail: amitavachatterjee@hotmail.com

Abstract: The present paper advocates the concept of a supervisory fuzzy controller. The proposed FLC algorithm employs a parallel architecture where an additional PD-type FLC can be employed either in conjunction with a conventional PID controller or a static fuzzy controller to improve system performance. The additional FLC implements a different rule base compared to a standard PD-type FLC, when employed alone. The effectiveness of the proposed scheme has been demonstrated by implementing it in simulation for two linear plant models of marine diesel engines and a nonlinear process plant. Its performance has been compared vis-à-vis a standard PD-type FLC, employed in simulation, for the same processes. The system performance is evaluated under both transient and steady state load disturbance conditions and also under noisy measurement environment.

Keywords: fuzzy control, add-on type fuzzy controller, marine diesel engine, nonlinear process plant

DOI: 10.3233/KES-2004-8104

Journal: International Journal of Knowledge-based and Intelligent Engineering Systems, vol. 8, no. 1, pp. 27-35, 2004