机动目标断裂航迹粘连

摘要

针对目标跟踪系统中由于目标机动产生的断裂航迹,提出了量测缺失下的航迹粘连算法和有量测情况下的航迹粘连算法.首先,对新起始的航迹进行平滑处理.然后,利用转弯模型对断裂航迹进行外推,针对无量测情况,采用UT对转弯角速率进行估计；针对有量测情况,采用期望极大化的策略对目标状态及转弯角速率进行迭代优化.通过蒙特卡洛仿真验证了该方法能有效提高航迹连续性,减少虚假航迹数,降低目标状态估计误差.%In order to combine the broken track segments due to highly maneuvering target and improve track continuity in target track ing system,two new track segment association algorithms are presented-TSAwoM(track segments association without measurement) and TSAwM(track segments association with measurement).Previously,a track pretreatment using Kalman smooth is presented to improve the accuracy of each track segment.The broken track segments are propageted by coordinated turn(CT) model,which is more reasonable.A turn rate estimator based on unscented transform(UT) is proposed to make full use of the broken track segments.Also presented is a state estimation algorithm based on expectation maximum(EM) algorithm in TSAwM,which is aiming at the target motion uncertainty when target has a coordinated turn maneuver.simulations are carried out to evaluate the performances of the proposed TSAwoM and TSAwM.