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A Causal Analysis Method for Underwater Vehicle Steerability

An underwater vehicle, causal analysis technology, applied in instrumentation, geometric CAD, design optimization/simulation, etc., to achieve the effect of input simplification

Active Publication Date: 2021-11-05
NORTHWESTERN POLYTECHNICAL UNIV
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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

Method used

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  • A Causal Analysis Method for Underwater Vehicle Steerability
  • A Causal Analysis Method for Underwater Vehicle Steerability
  • A Causal Analysis Method for Underwater Vehicle Steerability

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specific Embodiment

[0064] A causal analysis method for the handling stability of underwater vehicles proposed by the present invention, the schematic diagram of the causal diagram is as follows figure 1 shown. For example, a "+1" arrow from A to C means that A increases when C increases; multiplying a "+1" arrow from A to C, and a "+1" arrow from C to F, the result of the multiplication operation is "+1 "This means that F is monotonically increasing with respect to A; at the same time figure 1 Among them, A affects F through C or D, and the two have opposite effects, so A can be considered as a contradictory variable.

[0065] Combined with the analysis example of the angle of attack balance of the maneuverability of the underwater vehicle and the accompanying drawings, it will be further explained.

[0066] The main analysis process is as figure 2 ,include:

[0067] 1. Determine the basic form of the structure matrix of the underwater vehicle's stability balance angle of attack

[0068] C...

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Abstract

The invention discloses a causal analysis method for the maneuverability of an underwater vehicle. Firstly, according to the principle of monotonous influence among variables, a causal diagram based on causal relationship is constructed; an input-output relationship matrix and a monotonous influence relationship matrix are obtained from the causal diagram. The two matrices are transformed, the input variables are divided into non-contradictory variables and contradictory variables, and the first stage of dimensionality reduction is completed; the Sobol GSA method is used to calculate the weight of the connection between each two nodes in the causal graph, and the weight is compared with the threshold. Obtain a new causal diagram, and then divide contradictory variables into important contradictory variables and non-important contradictory variables according to the new causal diagram, and complete the second stage of dimensionality reduction. The invention aims at the shortcomings of the current principal component analysis method of the underwater vehicle, and improves the logic and efficiency of design optimization. At the same time, it is also applicable to the optimization design of other disciplines of underwater vehicles, and has a wide range of applications.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/17G06F30/28G06F119/14
CPCG06F30/15G06F30/17G06F30/28G06F2119/14
Inventor 宋保维董华超王鹏杜晓旭施瑶
Owner NORTHWESTERN POLYTECHNICAL UNIV
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