Modeling, simulation and control of high speed nonlinear hydraulic servo system

Abstract. The goal of this paper is to present for modeling a Hydraulic Servo System (HSS). This work describes the design and implementation of a control system for the operation of a hydraulic mini press machine. First, we develop mathematical models for obtaining the system responses. These responses of the servo valve, and open loop HSS are given step and sinusoidal inputs. While, the closed loop system is based on linearized model of feedback regulator of PD controller for high-speed control. All models and controllers are simulated using MATLAB and SIMULINK computer program. An experimental set-up is constructed, which consists of micro-controller PIC 18F458 as controller, a servo valve driven HSS, and feedback elements. The result shows that, HSS can provide higher speed of response with fast motion of the plant and its performance is compared with three alternative high speed nonlinear HSS. It is shown that, proposed method is superior to existing ones.