拦截高速机动目标偏置比例制导律研究

摘要

A new biased proportional navigation (BPN)guidance law is proposed to solve out the problem of the impact angle constrains.With the time varying adaptive navigation ratio,the guidance law has both head-pursuit and head-on interception ability,and is able to intercept high or low speed maneuvering targets.The paper derives the time varying biased angle ratio solution aimed to maneu-vering targets on plane and then gives the adaptive navigation ratio expression.By expanding planar navigation law to three-dimensional navigation law,the paper derives the calculation relationship be-tween 2-D acceleration and 3-D acceleration,and gives the expected impact angle implement method of 3D guidance.In comparison with other three guidance laws,the paper shows that the proposed meth-od has advantage in impact angle error,miss distance and control effort.%针对制导过程中碰撞角约束问题，提出了一种偏置比例导引律。该导引律采用时变的自适应导航比，兼备了顺轨和逆轨拦截能力，并可拦截高速机动目标和低速机动目标。针对机动目标推导了时变偏置角速率偏差的平面解析解，并且给出了自适应导航比的表达式；将平面制导律向三维扩展，给出了二维加速度与三维总加速度的计算关系，提出了三维期望碰撞角的实现方法。通过与3种导引律对比，验证了所提出导引律在碰撞角误差、脱靶量和控制力等方面均有优势。