Adaptive Back-stepping Control of Permanent Magnetic Synchronous Motor Based on Slide Mode Observer

Permanent-magnet synchronous-motor is a multi-variable, non-linear, strong coupling system that is highly sensitive to the outer interfere and inter perturbation. To improve the system robustness, the adaptive back-stepping control of permanent magnet synchronous motor based on slide mode observer is put forward. Based on the mathematic model of permanent magnet synchronous motor and the theory of slide mode observer, the real-time online estimation of the position angle and speed of rotor is realized, and furthermore the estimation of the position of rotor is revised, so the close loop controlling of motor is conducted. In addition in order to suppress the effect of uncertain factors to the performance of system such as parameter perturbation and load perturbation, the adaptive back-stepping control strategy is used to adaptively adjust states in according to the change of parameters for ensuring the stability and performance of system. The simulation results show the strategy with good dynamic characteristic and robustness.