Comparison Of Linear And Intelligent Control For A Nonlinear Electro-Hydraulic Actuator Systems

Abdulghani Mohammed, Saeed Mohammed (2017) Comparison Of Linear And Intelligent Control For A Nonlinear Electro-Hydraulic Actuator Systems. Project Report. UTeM, Melaka. (Submitted)

Text Comparison Of Linear And Intelligent Control For A Nonlinear Electro-Hydraulic Actuator Systems - Saeed Mohammed Abdulghani Mohammed - 24 Pages.pdf - Submitted Version Download (540kB)

Abstract

Electro-hydraulic actuator systems perform a necessary role in industrial applications. The nonlinear electro-hydraulic actuator suffers from nonlinearities and time varying characteristics such as high speed, fast stop and the start of the hydraulic cylinder. The nonlinear properties challenging the position of the nonlinear electro-hydraulic actuator. In this report, development of linear and intelligent control techniques will be designed such as linear PID control, intelligent fuzzy logic control and hybrid fuzzy-PID control that can be used to control the tracking position of nonlinear electro-hydraulic actuator systems. Firstly, the mathematical model of electro-hydraulic systems will be represented using MATLAB and Simulink. Through simulation in MATLAB and Simulink, the appropriate procedure to tune PID parameters and fuzzy rules will be conducted. The fuzzy controller also will be utilized to tune the gain parameters which are (Kp, Ki and Kd) of the PID controller. The performance parameters such as the system steady-state error, overshoot and settling time are different control techniques will be assessed. Through the mathematical model of the process, the tuning method for PID, Fuzzy and Fuzzy-PID controllers will be conducted with considerations that should be made for that system. The linear and intelligent controllers have been evaluated using various tracking trajectories. It shows that hybrid Fuzzy-PID performs better as compared to PID and Fuzzy controllers. About 20% improvement of the tracking error has been obtained using the Fuzzy-PID controller. As conclusion integration between linear and nonlinear controllers will produce significant improvement for tracking performance particularly in nonlinear electro-hydraulic actuator systems.

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