基于SAR的组合导航系统仿真研究

针对地形辅助导航中SAR图像匹配高度通道不可观，及传统Kalman滤波器自适应性差的缺陷，提出引入GPS高度信息及自适应联邦Kalman滤波算法，设计基于自适应联邦滤波的SINS／GPS／TAN／SAR四组合导航系统。该方案能有效地提高系统的自适应性、导航精度和自主性。并且由于方位误差角是直接观测量，使得载体不需机动即可获得良好的惯导空中对准能力。同时，该方案还可以提供SAR系统所需的运动补偿信息，由此构成导舷设备与任务设备互补的双向信息融合系统。

Simulation of Integrated Navigation Based on SAR

The techniques of GPS elevation correlation and self-adaptive filtering are employed in the integrated SINS/GPS/TAN/SAR navigation system. The operation principle, algorithm and key techniques are addressed. Technical performance analysis based on computer simulation shows that the SINS/GPS/TAN/SAR integrated navigation system has advantages of high accuracy, wide adaptability and good capability of in-flight alignment. At the same time, this scheme can provide the motion compensation information to SAR. Therefore, on the basis of it, a bidirectional complementary information amalgamation system of navigation devices and task devices can be formed.