临近空间高超声速滑翔弹双通道跟踪算法

为了提高临近空间高超声速滑翔目标的跟踪精度，提出了一种双通道并行跟踪算法。首先对比分析了目标的弹道轨迹，目标角度域参数相比位置域参数存在更显著的变化规律，为了在雷达测量直角坐标系下跟踪，采用倾角和方位角代替航迹倾角和航向角，将倾角变化率和方位角变化率描述成零均值正弦自相关随机过程，分别建立了纵向通道和横向通道的角度域模型。然后将目标轨迹分解到纵向观测平面和横向观测平面，通过量测数据预处理、双通道并行滤波、输出状态合并，实现目标的三维跟踪。最后通过仿真实验设置了算法中两个通道的机动模型的参数，分析了过程噪声对跟踪精度的影响，仿真结果表明，与现有的临近空间高超声速目标跟踪算法相比，该算法具有较高的跟踪精度。

Dual-Channel Tracking Algorithm for Near Space Hypersonic Gliding Missiles

To improve the tracking accuracy for the hypersonic gliding targets in the near space, a dual-channel parallel tracking algorithm is proposed. Firstly, the target’s ballistic trajectory is compared and analyzed. There are more significant changes in the motion parameters of angle domain compared to that of the position domain. In order to make tracking in the East North Up coordinate system, the inclination angle and azimuth angle are used instead of the flight path angle and velocity azimuth angle to establish the maneuvering models in the longitudinal and horizontal channels respectively. The change rate of the inclination angle and azimuth angle are all described as a zero-mean sinusoidal autocorrelation stochastic process. Then, the trajectory is decomposed into the longitudinal and horizontal planes. A three-dimensional tracking of the target is achieved through 〖JP3〗the measurement data preprocessing, dual-channel parallel filtering, and output state merging. Finally, the parameters of the two-channel maneuvering model in the algorithm are set through the simulation experiments, and the influence of the process noise on the tracking accuracy is analyzed. The simulation results show that, the algorithm has higher tracking accuracy compared with the existing near-space hypersonic target tracking algorithm.