地形特征匹配辅助导航方法研究

对传统的地形轮廓匹配辅助导航算法进行了如下改进：首先在景象匹配的基础上对飞行区域作出预测,其次利用实测高程度列和预测高程序列匹配,对飞行器进行实时定位和下一时刻的航迹预测;最后利用递堆和缩小匹配网格搜索范围等手段减少计算量。该方法提高了地形轮廓匹配的实时性和精度,增加了飞行器超低空飞行的可靠性和机动性。

Study of Terrain Feature Matching Aided Navigation Method

This paper improves the conventional terrain contour matching(TERCOM) aided navigation system algorithm as fellows: first, the region to be flown are forecasted on the basis of stereo matching; then, the matching result of the real measured and forecast terrain height sequences is used to locate the position of aircraft and to forecast aircraft track in the next time interval; at last, by recursion and reducing the search range of matching grid, the computation burden is reduced. The method presented in this paper improves the real time property and the precision of TERCOM, and enhances the security and maneuverability of aircraft at low altitude flight.