Fault-Tolerant Control for Model Mismatch in Permanent Magnet Synchronous Motor
Aiming at the problem that the drive system of high-precision permanent magnet synchronous motor is affected by the mismatch of moment of inertia,friction coefficient and flux linkage,which leads to the reduction of control accuracy and stability,a model-free sliding mode fault-tolerant control method based on finite-time convergent extended state observer is proposed.Firstly,the ultra-local model of PMSM speed loop considering internal and external uncertainties is established,and a model-free global integral ter-minal sliding mode controller is designed;Secondly,a finite-time convergent extended state observer is de-signed to reduce the effect of model mismatch;Finally,by comparing with other methods,it is verified that the proposed method can achieve fault-tolerant control for multiple model mismatches and external disturb-ance conditions without obtaining accurate models,and improve the control accuracy of the motor.
permanent magnet synchronous motormodel-free controlmodel mismatchfault-tolerant control
NETL
NSTL
万方数据
维普
