水下地形导航匹配区选取的模糊推理方法

doi:10.3969/j.issn.1001-2400.2017.01.025

Abstract

Abstract:

To overcome the problems of not describing terrain matching characteristics totally with a single terrain feature parameter in underwater navigation terrain database, an evaluation method named Vague set is proposed to describe the terrain suitability comprehensively based on the fuzzy decision making (FDM) method. The membership functions and non-membership functions of the Vague set are used to define the influence of the terrain map characteristics parameters on matching suitability, and comprehensive evaluation values of matching areas are obtained by the weighted score function method. Simulation results demonstrate that the terrain map suitability is positively proportional to the comprehensive evaluation value, while the matching position error is negatively proportional to the comprehensive evaluation value of the matching area. The Vague set can choose the optimal matching areaeffectively, and solve the problem that the single topographic map featurecannot evaluate suitability comprehensively.

Key words: underwater terrain aided navigation (TAN), terrain elevation matching (TEM), terrain feature, membership functions, fuzzy set theory

WANG Lihui;QIAO Nan;YU Le. Fuzzy deduction methods of selecting the underwater terrain navigation matching area[J].Journal of Xidian University, 2017, 44(1): 140-145.

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Fuzzy deduction methods of selecting the underwater terrain navigation matching area

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