Control Design of the Hydraulic Actuator with Integrated Control Valves

Abstract

The objective of this thesis is to design a hydraulic control system with integrated actuator using a controller which can be used in applications such as Spring / Suspension testing. In this thesis we have used a differential hydraulic cylinder, four integrated poppet valves, position sensor, pressure sensor and a spring to conduct testing. The simulation is done using a servo valve instead of four poppet valves to compare the efficiency of the integrated poppet valves whose results can be seen in the practical implementation. We can see from this thesis that the use of four integrated valves in an actuator can improve the accuracy and efficiency of the whole system. The theoretical part consists of study on hydraulic systems and its components, mathematical model of the system, a simulation model in SIMULINK, data acquisition of hydraulic system parameters, control algorithm of the system. Whereas, the practical part consists of the connection of the controller to the hydraulic system, control design of the hydraulic actuator and evaluations of the obtained results. Implementation of the model on an actual system, can show us the difference between the theoretical model and the real-world systems.