Abstract
Versatile engineering applications have been developed to assist, reduce, and avoid human being from any heavy or harmful manufacturing processes. The gradually increased demand in force and position controls have simultaneously increased the usage of Electro-Hydraulic Servo (EHS) system. However, the time varying characteristics such as high-speed, outburst starting and stopping dynamic have led the EHS system to suffer from uncertainties and nonlinearities effects. Therefore, in order to enhance the performance of an EHS to surmount the uncertain and nonlinear effects, a hybrid Fuzzy-PID control strategy is developed which particularly improve the accuracy of the system by enhancing the control performance during the positioning tracking. By measuring the performance of the proposed control approach, the transient response and steady-state analysis will be performed which taking linear and intelligent control strategies as the references in the assessment process. The finding indicates the capability of a hybrid Fuzzy-PID controller in reducing the control effort applied to the EHS system.
Highlights
An actuator system is a device that produces mechanical movement by changing different type of energies into mechanical energy
This paper proposed a hybrid FuzzyPID control approach to dealing with the nonlinear characteristic of the Electro-Hydraulic Servo (EHS) system
Since the assistant of the Fuzzy Logic control approach applied to the PID controller is proven to be performed better [7], the important properties of the Fuzzy Logic will be used to tuned the PID controller to obtain an optimal result for the EHS system that dealing with large amount of parameter variation [26]
Summary
An actuator system is a device that produces mechanical movement by changing different type of energies into mechanical energy. The nonlinear properties that are produced through pressure and flow rate of the hydraulic system required a suitable controller to achieve better performances. There are many type of control techniques have been reported, which can be utilized to control the tracking capability of a nonlinear electrohydraulic actuator system. The numerical analysis such as system overshoot, settling time and steady-state error will be different for each type of control techniques. This paper proposed a hybrid FuzzyPID control approach to dealing with the nonlinear characteristic of the EHS system. It is observed from the literatures, there are not much comparison studies for this type of controller in term of transient response and steady state error evaluation.
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