针对传统单模型跟踪方法不能有效跟踪临近空间高超声速目标飞行全过程的问题,提出了一种基于SCT-IMM的跟踪模型。在分析临近空间高超声速目标特性的基础上,建立了一种基于一阶时间相关模型的转弯模型(Singer Coordinate Turn,SCT),结合EKF滤波方法,采用CV、CA和SCT模型进行IMM滤波计算。仿真结果表明,新模型计算量略大于单模型,但新模型能够适用于跟踪临近空间高超声速目标的所有飞行阶段,且位置均方根误差和速度均方根误差都小于单模型,具有一定工程实践意义。

Aimed at the problem that the traditional tracking methods based on a single model can not effectively track the whole flight process of near space hypersonic target, a tracking model based on SCT-IMM is proposed. A first time correlation coordinate turn model is established (Singer Coordinate Turn, SCT) on the base of the analyzing of the near space hypersonic targets’characteristics, CV, CA, and SCT model are adopt for combing the EKF filtering method to do IMM filter calculation. The simulation results show that the new model of computation is slightly larger than the single models, but the new model can be applied to the track all phases of flight of near space hypersonic target, and the position root mean square error and speed root mean square error are less than the single model, which is of certain significance to engineering practice.

国家自然科学基金资助项目