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Comprehensive evaluation method for geomagnetic map suitability based on Vague set fuzzy inference

A comprehensive evaluation and fuzzy reasoning technology, applied in the direction of navigation calculation tools, etc., can solve problems such as inaccurate evaluation and achieve the effect of optimal selection

Active Publication Date: 2016-07-13
SOUTHEAST UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a comprehensive evaluation method for geomagnetic map adaptability based on Vague set fuzzy reasoning, which can solve the problem of inaccurate evaluation of a single feature quantity, and select the matching area with the best adaptability. Optimizing the selection of geomagnetic aided navigation area

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  • Comprehensive evaluation method for geomagnetic map suitability based on Vague set fuzzy inference
  • Comprehensive evaluation method for geomagnetic map suitability based on Vague set fuzzy inference
  • Comprehensive evaluation method for geomagnetic map suitability based on Vague set fuzzy inference

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Embodiment Construction

[0031] The geomagnetic map data is stored in the computer in the form of a grid, and the features extracted from the geomagnetic map data are called geomagnetic map features.

[0032] Assuming that the grid size of a certain sea area is a candidate matching area of ​​M×N, M is the latitude span, N is the longitude span, f(i, j) is the geomagnetic field strength value at the grid point (i, j), where ( i, j) corresponds to a set of latitude and longitude coordinates Based on the above parameters, the geomagnetic standard deviation, geomagnetic information entropy, geomagnetic roughness, and slope variance are derived.

[0033] Magnetic standard deviation: Indicates the average value of the geomagnetic field in the candidate matching area. The geomagnetic standard deviation reflects the dispersion degree of the geomagnetic field in the region and the overall fluctuation of the geomagnetic field. The larger the geomagnetic standard deviation, the more obvious the geomagnetic ...

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Abstract

The invention discloses a comprehensive evaluation method for geomagnetic map suitability based on Vague set fuzzy inference.The comprehensive evaluation method for geomagnetic map suitability based on Vague set fuzzy inference has the advantages that a Vague set fuzzy decision-making method richer in information is put forward, correlation and redundancy reasons existing among geomagnetic map characteristics are taken into account, quantitative bases are provided for suitability analysis of candidate matching areas, methods for studies on suitability of underwater geomagnetic matching areas are enriched, the problem of inaccuracy of single characteristic quantity evaluation is solved, the matching area optimal in suitability can be selected and selection of geomagnetism-assisted navigation areas is optimized.

Description

technical field [0001] The invention relates to a comprehensive evaluation method of geomagnetic map adaptability based on Vague set fuzzy reasoning. Background technique [0002] The suitability of the geomagnetic map is an important factor affecting the accuracy of geomagnetic navigation, and it is an inherent attribute of the geomagnetic field. The geomagnetic map feature is the basic content of the fitness analysis, and each geomagnetic map feature reflects an aspect of the matching performance of the candidate matching area. At present, the analysis of the adaptability of geomagnetic maps is mostly considered from the perspectives of fuzzy decision-making, classification of adaptation areas, and scene matching. Using geomagnetic map features as input, usually the input geomagnetic map has a lot of features and a large amount of calculation; the acquisition of scene matching map is based on the form of "camera" to obtain a two-dimensional map, which is different from th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
CPCG01C21/20
Inventor 王立辉余乐乔楠
Owner SOUTHEAST UNIV
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