临近空间高超声速飞行器机动模型及弹道预测

讨论了临近空间轴对称高超声速机动飞行器的跟踪及弹道预测问题。通过引入3个与气动力参数相关的状态变量,建立起一种非线性机动模型,并证明了基于该模型的非线性跟踪系统的可观性。针对此非线性跟踪系统,设计了扩展卡尔曼滤波器以及状态预报器,实现弹道跟踪和预测。仿真结果表明,对于临近空间飞行器在巡航末段的运动状态,采用所提出的机动模型,可以取得优良的跟踪和预测效果。

Maneuver model and trajectory prediction of near space hypersonic aircraft

The tracking and trajectory prediction of axisymmetric hypersonic maneuvering aircraft in near space are discussed. By introducing three state variables related to aerodynamic parameters, a nonlinear maneuver model is established and the observability of the nonlinear tracking system based on the model is proved. For this nonlinear tracking system, an extended Kalman filter and a state predictor are designed to achieve trajectory tracking and prediction. The simulation results show that the proposed maneuver model achieves excellent tracking and prediction effects for the near space aircraft at the end of the cruise.