DefinePK

Abstract

Tracking accuracy is very crucial in production industries such as automotive industrial that heeds high-precision. A slight deviation might cause severe consequences in terms of squandering. The difficulties are increased when faced with the system that is naturally highly nonlinear with major uncertainties such as electro-hydraulic actuator (EHA) system. Therefore, control system is playing enormous roles to significantly improve the EHA system positioning tracking accuracy by lessening the error caused by nonlinear and uncertain characteristics. This paper introduced the conventional proportional-integral-derivative (PID) controller, as a trademark to the improved fractional-order PID (FOPID) controller. Which are both optimized by using the particle swarm optimization (PSO) algorithm. To analyse the positioning tracking capability of the designed controllers, sinusoidal reference trajectory is first implemented. More attentive analyse based on multiple sinusoidal reference trajectory is conducted. Based on the output response, it is observed that the FOPID controller outperforms the PID controller.