一种变速度条件下控制攻击角度和时间的制导律

An impact time and angle control guidance law under variable speed condition

中文关键词  攻击角度  攻击时间  变速度  轨迹设计  贝塞尔曲线

英文关键词  impact angle  impact time  variable speed  trajectory design  bezier curve

中文摘要

      对攻击角度和时间进行控制, 可以使得多枚导弹按照特定的角度和时间对目标进行打击, 在军事上有广泛的应用前景. 目前已有控制攻击角度和时间的制导律极少考虑速度变化的情况, 在实际运用中具有较大的局限性.本文基于贝塞尔曲线加直线的二段式轨迹, 首先分析并证明了该轨迹长度和最大曲率的变化规律, 在此基础上, 通过二分法确定初始轨迹, 针对飞行过程中的诱导阻力和其它扰动, 设计了Bezier-PI控制算法, 通过动态调整轨迹长度来实现攻击时间的高精度控制. 该制导算法计算量小, 鲁棒性强, 适用于弹载计算机实时计算. 通过仿真实验, 验证了该算法可以高精度的控制攻击时间以及攻击角度

英文摘要

      Impact-time-and-angle-control guidance (ITACG) law can realize that multiple missiles strike from different impact angles at the same time, which has a wide range of military applications. However, the current methods to solve the ITACG problem rarely consider the variable speed which will cause great limitations in practical application. Based on the two-segment trajectory of Bezier curve and straight line, we analyze the pattern of maximum curvature of the trajectory, and prove that the trajectory length is monotonic with straight-line length. Second, this paper uses binary search to determine the whole trajectory. Third, to control the impact time, we design a Bezier-PI controller that dynamically adjusts the straightline length. The guidance algorithm has small calculation and strong robustness, which is suitable for real-time calculation by missile-borne computers. The simulation results verified that the algorithm has strong robustness to the induced drag and parasite drag disturbance and can reach a high precision impact time and impact angle.