Research on Nonlinear Decoupling Sliding Mode Control of Permanent Magnet Synchronous Motor

The parameter of permanent magnet synchronous motor reveals uncertainty in actual modeling, which leads to the limit of differential geometry theory in control. In this paper, the differential geometry and sliding mode variable structure are integrated to solve the problem. Firstly, the basic condition of sliding mode existing is discussed. Then a kind of variable structure controller is designed for its robustness and anti-interference ability. The simulation results show that the variation of parameters and the load disturbance have finite influence on speed of motor. Meanwhile, the control system has improved its performance in anti-interference, accuracy and robustness.