基于摄动落点预测与修正比例导引的复合修正算法设计

Design of Composite Trajectory Correction Algorithm Based on Perturbation Impact-point Prediction and Modified Proportional Navigation

为提高旋转稳定弹的精确打击能力,该文以安装固定鸭舵式二维弹道修正组件的修正炮弹为对象,针对旋转稳定弹的控制特点,设计出一种基于摄动落点预测与修正比例导引律相结合的修正算法。针对弹道的升弧段与降弧段,分别推导出摄动落点预测偏差与修正比例导引的控制信号,并根据弹体传函建立出全弹道复合算法的控制信号。通过仿真,在仅考虑弹丸的随机扰动情况下,修正弹弹道落点的纵向标准差为22.8357 m,横向标准差为23.5792 m,圆概率误差为27.5070 m。仿真结果表明,摄动+比例导引的复合导引算法可有效提高该修正弹的射击精度,减小落点散布。

In order to improve the precision strike capability of rotating stable projectile,a modified projectile with a fixed-rudder two-dimensional ballistic correction component was taken as the object of study,and a perturbation-based point prediction and correction ratio for the control characteristics of rotating stable projectile was designed.The correction algorithm was combined with the guidance law.For the rising and falling arc segments of the ballistics,the control signals of the perturbation point prediction deviation and the correction ratio guidance were derived respectively,and the control signal of the full ballistic composite algorithm was established according to the body transfer-function.Through simulation,the longitudinal standard deviation of the modified ballistic point is 22.8357 m,and the lateral standard deviation is 23.5792 m,and the CEP is 27.5070 m while considering only the random disturbance of the projectile.The simulation results show that the perturbation+proportional guidance composite guidance algorithm can effectively improve the shooting accuracy of the modified missile and reduce the distribution of the falling points.