Original Article

Influence of Electric Cylinder Transmission Characteristics on Servo System

¹ School of Automation, Beijing Institute of Technology, Beijing 100081, PR China
² China North Vehicle Research Institute, Beijing 100072, China

^* e-mail: tylqa@163.com

Received: 3 December 2024
Accepted: 10 March 2025

Abstract

Aiming at the problem that the servo control accuracy is restricted by the mechanical transmission characteristics of the electric cylinder, the servo motor model, the drive model and the servo control system model of the electric cylinder are established in this paper. The test bench system of mechanical parameters of electric cylinder was built. The key mechanical transmission parameters of the electric cylinder are obtained through the accurate parameter measurement of the actual system. Based on the measured data, the model is modified, and then the nonlinear model of electric cylinder servo system is constructed, which the empty return clearance and stiffness are considered in the model. This model is used to deeply analyse the influence of the mechanical transmission of electric cylinder on the servo system error, and reveal the sensitivity relationship between the clearance and stiffness on the servo system accuracy. The conclusion provides a scientific basis for the optimisation design of servo system based on electric cylinder. It has important theoretical and practical significance for improving servo control accuracy.