Terrain adaptive area selecting scheme based on hierarchical decision making

Abstract

The invention provides a terrain adaptive area selecting scheme based on hierarchical decision making, and belongs to the field of terrain assisting navigation. The terrain adaptive area selecting scheme involves a threshold value judgment model and a multi-criterion decision making model, wherein 1, the terrain adaptability is described by terrain characteristic parameters; 2, the threshold valuejudgment model comprises necessary conditions and sufficient conditions of an adaptive terrain, and the necessary conditions and the sufficient conditions are used for detecting an obvious inadaptiveterrain and an obvious adaptive terrain with high accuracy separately and transmitting a to-be-determined area to the multi-criterion decision making model; 3, according to the difficulty of modelingthe to-be-determined area, the multi-criterion decision making model builds one or more classifier models through a mode recognition method, and through decision making or merging decision making, anadaptive judgment result of the to-be-determined area is given. By the adoption of a hierarchical decision making scheme, by reducing the model adaptive range, the decision making efficiency and thedecision making reliability are effectively improved.

Description

technical field [0001] The invention provides a terrain adaptation area selection scheme based on hierarchical decision-making, and belongs to the technical field of terrain-assisted navigation. Background technique [0002] In the INS-based navigation system, due to the characteristic of INS error accumulating over time, other navigation methods are usually required for periodic correction, and the TERCOM algorithm (see "Golden J P. Terrain contour matching (TERCOM): a cruise missile guidance aid[ J]. Image processing for missileguidance, 1980, 238:10-18.") The terrain-assisted navigation algorithm represented by is a common method combined with INS. The advantage of the terrain-assisted navigation algorithm is that it is easy to apply and has reliable performance. The key to terrain-assisted navigation accuracy. [0003] In the 1970s, researchers proposed a theoretical model for estimating the accuracy of the TERCOM algorithm, which actually provides a method for estimat...

AI Technical Summary

Problems solved by technology

However, in the existing research results, the adaptability analysis and modeling are often based on a single model, which makes it difficult for the model to simultaneously improve the number of detections in the adaptation area and the detection accuracy rate.

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