Dual sliding mode variable structure control design for BTT missile autopilot

Current channel independent STT design method cannot cater for the requirement of BTT missile design due to coupling between different channels. A new BIT missile autopilot design method based on variable structure control theory is presented. The design sets up a combined state equation for two coupling channels. Adaptive pole configuration is used for dual sliding mode, which can reduce the switching frequency of control factors. Approaching method is used for variable control design. The parameters of approaching function are adjusted timely, which can reduce the chatter of the slid mode. The method can simplify variable control and reduced calculate complex.