Improved Nonsingular Fast Terminal Sliding Mode Control for PMSM Drive System with STESO
In order to improve the tracking performance and robustness of the permanent magnet synchro-nous motor(PMSM)speed regulation system,an improved non-singular fast terminal sliding mode com-pound controller based on a super-twisting extended state observer(INFTSM +STESO)is proposed.First-ly,an INFTSM speed controller based on a modified variable exponential reaching law is proposed in this paper.It includes the system state variable in the conventional exponential reaching law,which not only re-duces the time for the system state to reach the sliding mode surface but also weakens chattering.Secondly,to improve the disturbance rejection ability of the system,a super-twisting extended state observer(STE-SO)is designed to estimate the total disturbance of the system.The simulation and experimental results in-dicate that this method has the advantages of fast convergence,small chattering,and strong robustness.
PMSMmodified variable exponential reaching lawnon-singular fast terminal sliding modesuper-twisting extended state observer
NETL
NSTL
万方数据
维普
