Dynamics of an Electro-Hydraulic Velocity Servo With Stick-Slip Friction

Abstract

Electrohydraulicservos exhibit nonlinear behavior whenever subjected to dynamic inputs due to the presence of several significant nonlineari^ies in the servovalve and hydraulic motor. Some mechanical nonlinearities are often responsible for performance limitations as expressed by speed of response, accuracy and stob^li^y^ This paper deal with the dynamic characteristics of electrohydraulic velocity servos in order to throw more light on the complicated role play^d by stick-slip friction of the actuator.