Reset control of integrating plus dead time processes. (February 2016)

• Record Type: Journal Article
• Authors: Davó, M.A.; Baños, A.
• Is Part Of: Journal of process control. Volume 38(2016:Feb.)
• Page Start: 22
• Page End: 30
• Publication Date: 2016-02
• Subjects: Hybrid systems -- Reset control systems -- PI tuning -- IPDT; Process control -- Periodicals; Fabrication -- Contrôle -- Périodiques; Process control; Periodicals; Electronic journals; 660.281
• DOI: 10.1016/j.jprocont.2015.12.001
• Languages: English
• ISSNs: 0959-1524

Abstract

Abstract : Highlights: A control scheme based on a reset proportional integral compensator is investigated. The tuning rule has a free parameter to balance between robustness and performance. A new reset strategy improves the load disturbance rejection. The proposed tuning rule is compared with the best known traditional tuning approaches. The proposed compensator is tested in a real experiment of liquid level control. Abstract: This work develops a tuning method for a reset compensator and an integrating plus dead time system. The reset compensator consists of a proportional integral compensator plus a Clegg integrator (PI+CI), and is equipped with a variable band resetting law, which allows to reduce the harmful effect of time-delay, and a switching reset ratio that obtains a superior performance in comparison with a well-tuned PI compensator. This work exposes a simple tuning rule for setting all the parameters of the PI+CI compensator with the aim of improving both setpoint tracking and load disturbance rejection. A case study is analyzed by simulation, discussing both performance and robustness of several PI+CI and PI compensators. Finally, an experiment of liquid level control shows the advantages of the proposed reset compensator.