Performance comparison between PI digital and fuzzy controllers in a level control system

Abstract

Liquid level systems are important in many industrial and academic applications, so measurement and control systems need to be as accurate as possible for this process. However, a level system has a nonlinear dynamic which increases the difficulty of modelling and design controller by classical methods. In order to address these issues, this paper discusses the modeling of a nonlinear level plant and the implementation of strategies for PI control and fuzzy control. The control algorithms are embedded in an 8 bits microcontroller, which provides the plant sample data via serial communication. Response specifications are stipulated so that the performance of the controllers is evaluated and compared. The results show a better performance for the fuzzy controller which could avoid larges overshoots with low computation costs and none anti-windup strategies.

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Published
2019-11-18
How to Cite
VASCONCELOS, Felipe José de Sousa; MEDEIROS, Cláudio Marques de Sá. Performance comparison between PI digital and fuzzy controllers in a level control system. Journal of Mechatronics Engineering, [S.l.], v. 2, n. 3, p. 10 - 18, nov. 2019. ISSN 2595-3230. Available at: <http://jme.ojs.galoa.net.br/index.php/jme/article/view/28>. Date accessed: 08 dec. 2019. doi: https://doi.org/10.21439/jme.v2i3.28.