防空导弹变结构控制器的设计研究

Variable Structure Design of Air Defence Missile

为提高防空导弹控制系统的稳定性,将导弹三通道之间的耦合量处理为单通道未知的有界舵偏干扰,弹体气动参数的非线性变化等效为弹体标称气动参数的有界摄动,设计了一种积分变结构控制器,分析了变结构控制系统滑模的可达性,研究了参数摄动时滑动模态的稳定性。算例表明,所设计的变结构控制器鲁棒性强,对弹体气动参数的非线性变化和外界干扰具有良好的抑制能力。

To ensure stability of the control system of air defence missile, the nonlinear change of aerodynamic parameters was treated as bound-limited movement of normal parameters and the cross coupling among three channels was treated as bound-limited disturbance of rudder pedal perturbation of the single channel, an integral variable structure controller was designed. And then the reachability of the sliding model of the variable structure control system was studied. Whether the sliding model was stable when the aerodynamic parameter changed was also studied. The results show that the variable structure controller has good robustness and can efficiently restrain disturbance and variation of parameters.