临近空间非弹道式目标跟踪修正变结构滤波

Tracking filter for nonballistic near space targets based on MVSIMM algorithm

以X-51A和HTV-2为代表的临近空间高超声速飞行器采用非弹道式机动飞行方式,飞行速度快而且其加速度不规则,难以精确估计其运动状态。针对临近空间目标4种典型的非弹道式机动模式,设计了一种修正变结构交互式多模型(modified variable structure interacting multiple model,MVSIMM)算法。该算法采用当前统计模型作为中心模型,左右两边采用匀速转弯模型,相比传统变结构多模型算法,提高了模型切换速度,实现更加实时,可以更高精度跟踪临近空间目标飞行器。仿真结果表明,针对4种非弹道式机动模式,修正变结构交互式多模型算法效果优于固定结构多模型滤波方法。

As the representative of hypersonic vehicles in the near spacer X-51A and HTV-2 with characteristics of high speed and irregular acceleration often adopt the way of nonballistic maneuver flight, which cannot make an accurate estimation of the motion state. For tracking near space targets with four typical nonballistic maneuver types, a modified variable structure interacting multiple model （MVSIMM） algorithm is designed. This algorithm takes the current statistical CCS） model as the central model and the coordinated turn （CT） model on the left side and right side,which solves the problem of model switching delays can be faster than compared with the traditional VSIMM algorithm on the aspect of model switching, can be achieved tracking target in the near space with higher real-time and higher accuracy. The effect of MVSIMM algorithm is better than fixed structure interacting multiple model （FSIMM） filter algorithm towards four nonballistic maneuver models with Matlab simulation results above.