Improved Active Disturbance Rejection Control of PMLSM Based on GSMC
Based on the difficulty that the capability of the permanent magnet linear synchronous motor(PMLSM)system deteriorates due to uncertainties such as external disturbances,an improved global slid-ing mode active disturbance rejection control scheme was proposed.First of all,considering that the tradi-tional nonlinear function fal in the extended state observer is not smooth enough near the origin and has an inflection point,which will reduce the control accuracy,a Sigfal function with better smoothness is intro-duced to replace it.Secondly,Aiming at that the parameters of the nonlinear state error feedback control law(NLSEF)are too many thus difficult to tune and affects the performance of feedback control.The global sliding mode control(GSMC)is used to realize the feedback control to improve the dynamic and anti-dis-turbance performance of the feedback control part.The Lyapunov theory turn out system stability.In the end,the simulation results show that this approach can improve speed tracking accuracy,ensure dynamic performance,and enhance system robustness.
PMLSMglobal sliding mode controlnew nonlinear functionimproved active disturbance re-jection control
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