一种地形匹配导航区域的可导航性评价方法

Navigability Evaluation Method of Terrain Matching Navigation Area

单一地形特征参量对地形匹配导航区域可导航性的评价存在局限性,导致评价结果不能真实反映匹配区域可导航性的强弱.根据特征信息融合思想及关联度分析方法,通过引入向量关联度,选取地形特征信息统计参量中地形高程标准差、地形粗糙度、地形相关系数和地形信息熵进行融合,并构成地形特征参量集,利用灰色模糊综合决策理论对该特征参量集进行分析,进而提出一种灰色模糊综合决策的多指标评价方法.仿真结果表明:该方法在匹配区域可导航性的综合评价方面具有可行性,对于区域中匹配数量较多且地形高程数据量较小情况下均能做出正确评价,其评价结果可为地形可导航性分析、地形匹配导航区域选取以及航路规划等提供理论依据.

Single terrain characteristic parameter has some limitations in evaluating the navigability of terrain matching navigation area so that the evaluation results cannot really reflect the navigability of the matching area.For solving the problem,this paper selected the statistic parameters in the terrain feature information including the standard deviation,roughness,correlation coefficient and information entropy by using the characteristic information fusion and correlation analysis method,and introducing the vector correlation degree.The terrain feature parameter set was obtained and further analyzed by the grey fuzzy comprehensive evaluation theory,and then a multi-index evaluation method based on the above theory was discussed.The simulation results indicate that the method is feasible in the matching area navigation and can make the right evaluation in the large number of matching areas and the less arnount of terrain elevation deta under the same area.The evaluation result can provide the theoretical basis for the research and application such as the terrain navigability analysis,selection of terrain matching navigation area and route planning.