TUNING OF TWO-DEGREE-OF-FREEDOM IMC BASED ON A STRANGE NONCHAOTIC OPTIMIZATION APPROACH FOR LARGE TIME-DELAY PROCESSES

Yunzhu Shen and Wei Tang
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Yunzhu Shen: School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an, Shaanxi 710021, P. R. China
Wei Tang: School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an, Shaanxi 710021, P. R. China

FRACTALS (fractals), 2022, vol. 30, issue 03, 1-13

Abstract: The internal model control (IMC) has a good control effect for large time-delay systems, but the parameter tuning of the controller is a challenge for researchers. As a typical fractal (strange) attractor, a strange nonchaotic attractor has the dynamic characteristics of randomness and ergodicity. Based on these characteristics, an optimization method is proposed to tune the parameters of an internal model controller for a large time-delay process, which is named a strange nonchaotic optimization algorithm (SNOA). SNOA has the advantages of easy implementation, short execution time and having robust mechanisms to avoid local optimization. It can find the optimal parameters of the internal model controller in large time-delay systems. The results show that SNOA can effectively improve the dynamic stability of the large time-delay systems. It has also proved to be superior to chaotic optimization (CO) algorithm and particle swarm optimization (PSO) algorithm.

Keywords: Fractal Attractor; Internal Model Control; Strange Nonchaotic Optimization Algorithm; Large Time-Delay System (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218348X22500670

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