Title: PID controller tuning using hybrid optimisation technique based on Box's evolutionary optimisation and teacher-learner-based-optimisation

Authors: V.P. Singh; N. Patnana; S.P. Singh

Addresses: Department of Electrical Engineering, National Institute of Technology, Raipur, 492010, India ' Department of Electrical Engineering, National Institute of Technology, Raipur, 492010, India ' Department of Electrical Engineering, Indian Institute of Technology, Kanpur, 208016, India

Abstract: In this paper, a hybrid optimisation technique based on Box's evolutionary optimisation and teacher-learner-based-optimisation (BEO-TLBO) is proposed for proportional-integral-derivative (PID) controller tuning of level control of three-tank system. The integral-square-error (ISE) of unit step response is minimised for obtaining optimal controller parameters. The ISE is designed in terms of alpha and beta parameters. In BEO-TLBO, a global search is first carried out over the entire search space to determine the set of desired controller parameters using teacher-learner-based-optimisation (TLBO). The search is then refined in the second stage using Box's evolutionary optimisation (BEO). The results obtained using BEO-TLBO are compared with other existing techniques. Computer simulations reveal that the hybrid optimisation based approach meets the desired specifications with greater accuracy as compared to the other existing methods.

Keywords: Box's evolutionary optimisation; BEO; ISE; optimisation; PID controller; teacher-learner-based-optimisation; TLBO.

DOI: 10.1504/IJCAET.2020.108124

International Journal of Computer Aided Engineering and Technology, 2020 Vol.13 No.1/2, pp.258 - 270

Received: 29 Sep 2017
Accepted: 29 May 2018
Published online: 03 Jul 2020 *

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