Computational Study of Dynamic Behaviour of Electrohydraulic Servo System

In many industrial applications very frequently it is required to control both direction and rate of flow of oil simultaneously to obtain an accurate control of position or speed of a large mechanical load. The control valve used for this purpose is known as Electro-Hydraulic Servo Valve. The aim of this work is to present a computational model of an electro-hydraulic servo valve and its dynamic behavior of spool displacement. Dynamics of electro-hydraulic systems is highly non-linear and dynamic performance is highly influence by friction force. The key to harnessing the power developed by hydraulic actuators and controlling them with analogue electronic devices/ digital computers is the electro-hydraulic servo valve. In its simplest form, an electro-hydraulic servo valve is a spool valve with a spool positioned by solenoid-type magnetic actuators. These valves are called single-stage valves. The study of this work may the reference of future investigation of any electrohydraulic servo system.