机载雷达对地动目标跟踪研究

雷达对目标的跟踪过程中,往往利用α-β滤波器对目标航迹进行滤波以得到更高的跟踪精度。试验发现机载雷达对地动目标跟踪的过程中,若目标突然发生运动状态的改变如加/减速等,则滤波误差容易发散。工程上往往利用衰减记忆滤波器来维持滤波器的稳定性,但对于匀速运动目标,随跟踪步数的累积该滤波器跟踪精度无法得到持续改善。本文提出一种结合利用α-β滤波器和衰减记忆滤波器的目标跟踪算法,使其兼顾跟踪精度和滤波稳定性。通过仿真试验证明了该滤波方法的有效性。

Research on Ground Moving Target Tracking of Airborne Radar

When a radar is tracking a target,α-β filter is usually used for filtering of target tracks to obtain higher tracking accuracy.Tests show that when an airborne radar is tracking ground moving targets,if movement status(such as accelerating decelerating) of targets change suddenly,divergence of filtering error likely occurs.Memory attenuation filter is often used in engineering to maintain filter′s stability.However,to targets moving at constant speeds,tracking accuracy of the filter can not be improved substantially with accumulation of tracking steps.A method by incorporating α-β filter and memory attenuation filter is put forward,it can make good balance between filter′s accuracy and robust.Simulation results verified the effectiveness of this method.