Limitation of the dynamic load in the hoist mechanism of the shovel based on the additional drive

Abstract

In the article, the results of studies of the synthesis of the optimal structure and parameters of the electromechanical system of the hoist mechanism of the rope shovel EKG-8I, which provides the limitation of dynamic loads, are presented. The procedure of structural-parametric synthesis is described, which is based on the determination of the required control actions, independent from the structure of the control system of the hoist mechanism. Control actions were found by solving the inverse dynamic problems for a given type of oscillatory motions of the dipper in the start-up and load change modes. Based on the expression of the obtained time dependencies through the phase coordinates of the system and its combinations, the structure and parameters of the control system were found. The found structure of the control system of the standard electric drive of the hoist mechanism and the additional drive ensures the implementation of a given law of motion of the dipper. The numerical simulation of the electromechanical system of the hoist mechanism with an additional drive confirmed the effectiveness of using the proposed approach of reducing the dynamic loads with maintaining the productivity of the excavator.