Optimization Techniques In PID Controller On A Nonlinear Electro-Hydraulic Actuator System

• Main Authors: Ghazali, Rozaimi, Chai, Mau Shern, Chong, Shin Horng, Chong, Chee Soon, Jaafar, Hazriq Izzuan
• Format: Article
• Language: English
• Published: Penerbit Akademia Baru 2019
• Online Access: http://eprints.utem.edu.my/id/eprint/24203/2/2019_JOURNAL_SCOPUS_JARFMTS_CHAI.PDF; http://eprints.utem.edu.my/id/eprint/24203/; http://www.akademiabaru.com/doc/ARFMTSV56_N2_P296_303.pdf

The controller is an important component in the nonlinear control system, especially for the system that needs accuracy in position tracking. Electro-Hydraulic Actuator (EHA) system i s a popular nonlinear system that is used by researchers. Proportional- Integral-Derivative (PID) controller is the most popular controller that is normally used in the industry. This i s mainly because of i ts simplicity in the design process. However, there are three constants that need to be assigned in the PID controller, often we called thi s as the parameters s election process or the PID tuning process. In this paper, a comparison s tudy for the selection process of the PID parameters process will be conducted among Ziegler-Nichols tuning method, conventional Particle Swarm Optimization (PSO) technique and Priority-based Fitness Particle Swarm Optimization (PFPSO) technique. PFPSO is one of the improved versions of the conventional PSO technique. The s imulation study wi ll be conducted on a nonlinear Electro-Hydraulic Actuator (EHA) system. A simple robustness test on the PID controller will be evaluated in terms of actuator internal leakage. Results showed that the PID performed better whe n its controller's parameters are selected using PFPSO technique rather than the Ziegler-Nichols method and conventional PSO technique.