一种有撞击角和视场角约束的运动目标的偏置比例导引算法

针对以一定角度攻击运动目标问题，提出一种采用偏置比例导引的间接撞击角度控制方法。定义满足攻击角度约束的碰撞三角形概念，在这基础上给出了具有偏置比例导引形式的制导律。根据碰撞三角形要求的偏置项积分值设计两阶段和一阶段这两种计算偏置项的方法，其中两阶段方法不需要计算剩余时间，而一阶段方法能够攻击机动目标。考虑视场角和过载等约束条件限制，对偏置项进行三阶段改进，使导弹在满足这些约束条件的同时满足撞击角要求的偏置项积分值。为了适应机动目标的情况，考虑当前时刻导弹和目标运动信息，在线地偏置项进行实时更新。最后对运动目标和机动目标两种情况进行了仿真实验，验证了本文方法的有效性。

A Biased Proportional Guidance Algorithm for Moving Target with Impact Angle and Field-of-View Constraints

A indirect impact angle control based method with biased proportional guidance is proposed for a moving target in this paper.The concept of collision triangle which satisfies impact angle constraint is defined, and then the guidance law with the form of biased proportional guidance is given. According to the Collision triangle desired bias term integral, both two-phases method and one-phase method for calculating the bias term are designed, where the former does not need to compute time-to-go and the latter can attack a maneuvering target. Considering the field-of-view angle and acceleration constraints, three-phase bias-shaping method is proposed for the biased proportional guidance to satisfy these constraint conditions and the impact angle desired integral of bias term. In order to attack the maneuvering target, the bias term is real-time updated on-line by considering the current states of the missile and the target. Finally, numerical simulation for attacking moving and maneuvering targets is used to demonstrate the effectiveness of the proposed algorithm.