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为了实现导弹的精确打击,增强导弹的机动性,提出基于滑模变结构的导弹制导律。在设计趋近律时考虑到弹目距离的变化,使得系统状态轨迹快速且收敛到滑模面,并通过饱和函数替代符号函数抑制状态轨迹在达到滑模面时的抖动。仿真结果表明,滑模变结构方法相比于经典的比例导引方法,更能发挥导弹机动性并改善弹道,使导弹运动更加平滑。
In order to achieve the precise strike of the missile and enhance the mobility of the missile, a missile guidance law based on the sliding mode variable structure is proposed. Considering the change of missile distance in the design of the law of approaching, the state trajectory of the system converges rapidly to the sliding mode surface, and the saturation function substitutes the sign function to restrain the jerk when the state trajectory reaches the sliding surface. The simulation results show that the sliding mode variable structure method can make the missile more mobile and improve the trajectory than the classical proportional navigation method to make the missile more smooth.