改进的滑模观测器模型，实现永磁同步电机反电动势的估算。-Improved sliding mode observer model, realize the permanent magnet synchronous motor counter electromotive force estimate.

复合控制模式下的导弹拦截仿真，运用滑模控制方法与直接力相结合的方式(The simulation of missile interception in compound control mode is based on the combination of sliding mode control and direct force)