Global Fast Terminal Sliding Mode Control Based on Fractional Order Differentiation for Angular Position Synchronization Control of PMSM

Abstract

This paper is aimed at improve accuracy of angular position synchronization control of Permanent Magnet Synchronous Motor driving system. Traditional PID controller could not meet requirement due to poor dynamic characteristics. The Global Fast Terminal Sliding Mode Control (GFTSMC) has good ant‐disturbance ability, could make system more robust and realize synchronization control of angular position. But due to error in load torque observation, system state convergence error will be caused, which will reduce the accuracy of synchronization. In this paper, fractional‐order differentiation is used to replace the nonlinear part of GFTSMC, constructed Fractional Order Differentiation—GFTSMC (FOD‐GFTSMC) controller to improve accuracy of synchronization. Theoretical analysis will be used to demonstrate that this control strategy could improve convergence accuracy of system state, reduces error of synchronization, and some experiments will be carried out to verify that this kind of controller has high synchronization accuracy, fast dynamic response ability and strong robustness. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.