A Cross Coupling Control Strategy for Dual-Motor Speed Synchronous System Based on Second Order Global Fast Terminal Sliding Mode Control

Abstract

A cross coupling control strategy based on second-order global fast terminal sliding mode control(2-GFTSMC) is proposed in this paper aiming to improve the synchronization accuracy of dual-motor under external load and disturbance. Firstly, the global fast terminal sliding mode controller is designed to improve the starting performance and dynamic performance of single motor and eliminate chattering phenomenon. Secondly, in order to improve the synchronization accuracy, enhance the stability of the dual-motor system and shorten the response time, a second-order global fast terminal sliding mode controller is designed by combining the global fast terminal sliding mode control with the cross-coupling control strategy. Finally, an experimental platform of dual-motor synchronous control is built, and the effectiveness of the proposed synchronization control strategy is verified by experiments.

Keywords

• Cross coupling control
• dual motor speed synchronous system
• global fast terminal sliding mode control