APPROACH FOR THE IDENTIFICATION OF HYDRAULIC DRIVE SYSTEMS WITH DIGITAL CONTROL ACTUATOR

ABSTRACT This paper shows an approach for the identification of hydraulic drive system with digital control through numerical approximation of dynamic processes. Dynamic processes in the form of transient characteristics are obtained on the basis of known from previous studies nonlinear mathematical simulation model of the experimental setup consisting mainly of two parallel loop powered, each containing three-way, two-position hydraulic digital control valve and output of pipeline. Two parallel loops driven double acting actuator. Identification is made on the basis of synthesized linear mathematical simulation model allowing to approximate with maximum accuracy the variation of velocity of the actuator at constant values of frequency of the input control signal and different values of actuators stroke.