基于变结构控制理论的导弹平滑导引律研究

针对导弹采用变结构导引律攻击机动目标时,容易引起视线角速率的抖动现象,基于变结构控制理论,提出了一种设计简单、具有较好鲁棒性及准确性的平滑导引律。该导引律设计主要通过引入双曲正切函数,消除了攻击导弹的视线倾角增量变化律的抖动现象。通过仿真结果说明:在相同的攻击时间内,对比于比例导引律、变结构导引律,该导引律明显地减小攻击导弹的脱靶量,验证了该导引律的有效性。

Research on the Smoothness Guidance LawBased on Variable Structure Control Theory

When the missile using the variable structure guidance (VSG) law attacks the target with maneuver, the chattering of line-of-sight angular rate always happens. The smoothness guidance law based on variable structure control theory is presented to solve the problem. Moreover, this guidance law has good robustness and precision. This guidance law avoids the chattering of line-of-sight angular rate of attack missile by introducing the hyperbolic tangent function. The simulation results show that the smoothness guidance law reduces the miss distance of attack missile in the same attack time. And the results validate its effectiveness.