Modelling and Examining the Dynamic Characteristics of an Electro-Hydraulic Unit for Discrete Control Based on Direct Acting High-Speed Servo Valve

The paper presents and examines the possible application of discrete control method to hydraulic actuators. A dynamic model of the electro-hydraulic unit for discrete control is proposed as a main component in such power system. This unit consists of connecting pipe, small volume accumulator and a direct acting high-speed servo valve. The dynamic behavior of the unit is examined in the time domain. The obtained numerical results infer the practical significance of such control method.