基于瞬态相对模型的轨道机动目标运动参数估计  

Transient relative model based kinematical parameter estimation for orbital maneuvering target

作　　者：李元凯[1] 敬忠良[1] 胡士强[1] 

机构地区：[1]上海交通大学空天科学技术研究院,上海200240

出　　处：《控制与决策》2009年第7期1059-1064,1069,共7页Control and Decision

基　　金：国家863计划项目(2006AA704312);国家自然科学基金项目(60775022;60674107)

摘　　要：空间目标可能存在未知的机动,针对该类目标相对导航问题,提出一种基于瞬态相对模型的运动参数估计方法.该方法依据轨道密切性思想,在瞬态意义下建立相对运动模型和机动辨识算法,然后通过密切轨道到参考轨道的量测变换对冻结时间模型进行状态滤波,可为目标机动下的自主导航提供所需的相对状态与目标机动参数估值.误差分析表明,所得估值偏差均有界.仿真验证了该方法在目标存在机动情况下的有效性和一般性.Unknown maneuver is possibly existed for space target. For solving the problem of relative navigation of that type of target, a kinematic parameter estimation method based on transient relative model is proposed. According to osculation property of orbit, relative motion model and identification algorithm of target maneuver are built in transient sense. Then state estimation on frozen-time model is given through measurement transformation from osculating to referenced orbit. This method can simultaneously estimate the values of relative state and target maneuver required by autonomous navigation for maneuvering target. Error analysis shows that the estimation error is bounded. Simulation illustrates its effectiveness and generality under the situation of target maneuver existed.

关 键 词：非开普勒 未知机动 瞬态模型 相对导航 参数估计 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]