摘要
针对临近空间目标飞行速度快、机动特性强和加速度突变的特性,提出一种地心直角(ECEF)坐标系下基于目标特性分析的修正强跟踪滤波(MSTF)算法。首先,通过对ECEF坐标系下目标量测的无偏转化处理,以有效减小目标高超声速飞行所带来的旋转、平移和线性化误差影响;接着,在对目标特性充分分析的基础上,合理构建强跟踪滤波(STF)模型,通过对模型参数的自适应调节,以有效实现临近空间高超声速滑跃式轨迹目标的精确跟踪;最后,结合统计学原理对目标加速度的突变进行合理检测和补偿,以进一步修正强跟踪滤波模型的跟踪精度。仿真结果表明,与现有的临近空间目标跟踪算法相比,该算法具有较高的定位跟踪精度。
According to the characteristics of hypersonic speed, strong maneuvering and acceleration gust of near-space target, a modified strong tracking filter （MSTF） algorithm based on the target characteristic analysis is proposed under the Earth centered Earth fixed （ECEF） coordinate system. For this method, unbiased transformation is used to reduce the influence of rotation, translation and linearization errors of the hypersonic target under the ECEF coordinate system firstly. Then based on the full analysis of target characteristics, a strong tracking filter （STF） model is developed to track the near-space hypersonic sliding target by changing the model parameters adaptively. Finally, reasonable detection and compensation of acceleration gust are performed to further modify the tracking accuracy of the STF model. Simulation results show that nearspace target tracking can be finished more effectively than the existing methods by using the proposed algorithm.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2015年第6期1983-1994,共12页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(61372027
61102167
61102165)~~
关键词
临近空间
高超声速
滑跃
机动目标
跟踪
near-space
hypersonic
sliding
maneuvering target
tracking
