Underwater vehicle operation stability causal analysis method

Abstract

The invention discloses an underwater vehicle operation stability causal analysis method, which comprises the following steps of: firstly, constructing a causal graph based on a causal relationship according to a monotonous influence principle among variables; acquiring an input-output relation matrix and a monotonous influence relation matrix according to the cause-effect diagram, converting thetwo matrixes, dividing input variables into contradictory-free variables and contradictory variables, and completing first-stage dimensionality reduction; and calculating weight of the connection between every two nodes in the causal graph by adopting a Sobol GSA method, comparing the weight with a threshold value to obtain a new causal graph, and dividing the contradictory variables into important contradictory variables and non-important contradictory variables according to the new causal graph to complete the second-stage dimensionality reduction. Aiming at the defects of an existing underwater vehicle principal component analysis method, the underwater vehicle operation stability causal analysis method improves logic and efficiency of design optimization, and is suitable for optimization design of other disciplines of the underwater vehicle and is wide in application range.

Description

technical field [0001] The invention belongs to the technical field of aircraft design, and in particular relates to a causal analysis method. Background technique [0002] Autonomous underwater vehicle (AUV) is an underwater robot that can navigate autonomously to perform tasks such as ocean exploration, maritime search and rescue, and regional alert. In recent years, due to the increasingly urgent global requirements for the exploration and development of marine resources and the increasing emphasis on marine security, AUVs have received more and more attention because of their strong autonomy, high concealment, and strong adaptability. Research in this area is also becoming more and more abundant. As a complex engineering system, the overall performance of AUV often involves the knowledge of many disciplines, such as aircraft shape, fluid power, shell structure, energy, mass layout, propeller, stability, etc., which need to be considered comprehensively in the overall de...

AI Technical Summary

Problems solved by technology

The present invention aims at the shortcomings of the existing principal component analysis methods for underwater vehicles, and improves the logic and efficiency of design optimization

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