一种攻击地面固定目标的变系数比例导引律

为了提高命中精度 ,减小控制能量的消耗 ,对攻击地面固定目标且速度随时间变化的追踪器 ,推导出一种以控制能量消耗最小为性能指标的最优导引律 ,其中剩余时间的估算不仅考虑到追踪器速度大小的变化 ,而且考虑了方向的变化。同时 ,为了满足某些追踪器在碰撞点垂直入射的要求 ,给出在铅垂面内攻击时具有修正项的变系数比例导引律。仿真结果表明 ,该导引律与常系数比例导引律相比 ,控制能量少 ,脱靶量小 ,命中精度高。

A gain variable proportional guidance law for stationary target

In order to improve guidance accuracy and minimize the control energy, an optimal guidance law for missiles with time varying velocity is derived, which adapt to attack targets on the earth surface. When calculating the time to go function, not only the magnitude of velocity is considered, but also the direction of that is included. Meanwhile,a gain variable guidance law with additional function is given to satisfy the requirement of collision angle in vertical plane.Simulation studies show that the proposed law is superior to proportional navigation because its control energy is smaller and its guidance accuracy is better.