Automatic Control System for Electrohydraulic Drive of Production Equipment

Abstract

The purpose of the paper is the synthesis and research of the automatic control system for rotary motion electrohydraulic drive of technological equipment that considers the observation noise and stochastic perturbation of the object of control. To achieve this purpose, a mathematical model of the working processes in the electrohydraulic drive of equipment as an object of automatic control has been developed. The mathematical model includes linear dynamic links describing the power part of the drive with a hydraulic motor and the process of adjusting the working volume of the pump. According to the separation method, the solution of the task of synthesis of a stochastic linear optimal system is divided into two: the task of synthesis of the optimal filter and the deterministic task of synthesis of the optimal system. To develop the optimal linear controller, the method of dynamic programming is used. The research of dynamic characteristics of automatic control system is carried out, the analysis of transition processes for angular displacement and angular velocity are performed various values of drive parameters. Recommendations are given on the choice of the optimum values of transfer coefficients, considering the technological features of the equipment. The obtained research results can be used to improve the electrohydraulic drives of technological equipment, in particularly, the drives of equipment for machining materials, as well as to expand the functionality.