Simulation of electro-hydraulic servo actuator

Abstract

Hydraulic actuators are used in many applications like aircraft flight control, machinery and automobiles etc. This actuator when coupled with a feedback system is called a Servo Actuator. The response of the hydraulic actuator with time is significant particularly when the actuator is used for flight control operations. So finding the time response operation will be very helpful for the designer for analyzing the performance of the system. This also helps the designer to arrive at optimum design parameters of the hydraulic actuator. In this thesis a position control electro-hydraulic linear actuator is selected. This actuator is used for controlling the movements of the helicopter. Mathematical modelling of the hydraulic actuator and its components is done and based on the mathematical equations Matlab/Simulink models of the actuator and its components were made and the time response of the linear actuator is obtained by using Matlab/Simulink Software. The time response graphs which are obtained in this simulation are found to be in good compromise with the time response graphs of Moog experimental time response graphs.