Variable Gain NDOB Disturbance Observer Based Piecewise Integral Sliding Mode Control of Induction Motor
For improving the dynamic performance and robustness of induction motor,a novel sliding mode control method is designed.Firstly,a smooth piecewise saturation function is introduced into the sliding mode surface to improve the traditional integral sliding mode control,so that it can obtain better transient performance under the tracking accuracy of traditional integral sliding mode control.Secondly,a new ap-proach law is used to suppress chattering and improve the steady-state performance of the system.Finally,a variable gain nonlinear disturbance observer is designed,which can eliminate the estimated peak value at the initial time and accurately estimate the lumped disturbance due to model uncertainty and load disturb-ance.Compared with the traditional integral sliding mode controller,the experimental results show that the proposed method has better rapidity and stability.
induction motorspeed controlpiecewise functionvariable gain disturbance estimation
NETL
NSTL
万方数据
维普
