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Planetary gear train isomorphism judgment method and system based on adjacency matrix and medium

A planetary gear train and adjacency matrix technology, applied in geometric CAD and other directions, can solve problems such as low reliability, low efficiency, and complex calculations

Active Publication Date: 2020-03-24
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned isomorphism determination methods all have common problems: complex calculation, not intuitive enough, low reliability, low efficiency and limited scope of application

Method used

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  • Planetary gear train isomorphism judgment method and system based on adjacency matrix and medium
  • Planetary gear train isomorphism judgment method and system based on adjacency matrix and medium
  • Planetary gear train isomorphism judgment method and system based on adjacency matrix and medium

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Embodiment 1

[0076] Embodiment one, as figure 1 As shown, a method for determining the isomorphism of a planetary gear train based on an adjacency matrix includes the following steps:

[0077] S1: Obtain the 3D model diagrams of the two planetary gear trains respectively, simplify each 3D model diagram respectively, and obtain a one-to-one simplified topology diagram of each planetary gear train;

[0078] S2: According to the definition of the preset adjacency matrix, generate the adjacency matrix of the corresponding planetary gear train according to each simplified topology map;

[0079] S3: Obtain the component data of the corresponding planetary gear train according to each adjacency matrix, and determine whether the component data of the two planetary gear trains are the same, if yes, execute S4, and if not, determine that the two planetary gear trains are heterogeneous;

[0080] S4: According to each adjacency matrix, obtain the data of the number of motion pairs of the correspondin...

Embodiment 2

[0138] Embodiment two, such as Figure 11 As shown, a planetary gear train isomorphism judgment system based on an adjacency matrix, including a topological graph simplification module, a matrix generation module, a first judgment module, a second judgment module and a third judgment module;

[0139] The topological diagram simplification module is used to obtain the 3D model diagrams of the two planetary gear trains respectively, and simplify each 3D model diagram to obtain a one-to-one simplified topology diagram for each planetary gear train;

[0140] The matrix generation module is used to generate the adjacency matrix of the corresponding planetary gear train according to each simplified topology diagram according to the preset adjacency matrix definition;

[0141] The first judging module is used to acquire the component data of the corresponding planetary gear train according to each adjacency matrix, and judge whether the component data of the two planetary gear trains...

Embodiment 3

[0145] Embodiment 3. Based on Embodiment 1 and Embodiment 2, this embodiment also discloses a planetary gear train isomorphism judgment system based on adjacency matrix, which includes a processor, a memory, and is stored in the memory and can run on the A computer program on the above-mentioned processor, when the computer program runs, it realizes as figure 1 The specific steps from S1 to S5 are shown.

[0146] The isomorphism determination of the planetary gear system of the present invention is realized by the computer program stored in the memory and run on the processor. Based on the improved adjacency matrix, the isomorphism problem of the planetary gear system can be determined through simple calculations. It is simple and efficient, has low time complexity, can take into account the reliability of discrimination, simple calculation, less calculation amount and intuitiveness at the same time, and has a wide range of applications. It effectively reduces the design time an...

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Abstract

The invention relates to a planetary gear train isomorphism judgment method and system based on an adjacent matrix and a medium, and the method comprises the steps: obtaining 3D model graphs of two planet gear trains, simplifying each 3D model graph, and obtaining simplified topological graphs of the two planet gear trains; generating an adjacency matrix of the corresponding planetary gear train according to a preset adjacency matrix definition and each simplified topological graph; and according to each adjacent matrix, sequentially acquiring the component data, the kinematic pair number dataand the feature data of the corresponding planetary gear train, and sequentially judging whether the component data, the kinematic pair number data and the feature data of the two planetary gear trains are correspondingly the same or not, wherein if so, isomorphism of the two planetary gear trains is realized, and if not, isomerism of the two planetary gear trains is realized. Based on the improved adjacency matrix, the isomorphism problem of the planetary gear train can be judged through simple calculation, and the method is simple, convenient, efficient, small in time complexity, capable ofgiving consideration to judgment reliability, simple in calculation, small in calculated amount, visual and wide in application range.

Description

technical field [0001] The invention relates to the field of planetary gear trains, in particular to a method, system and medium for judging the isomorphism of planetary gear trains based on an adjacency matrix. Background technique [0002] The planetary gear train is an advanced gear transmission mechanism, which is one of the epicyclic gear trains. It has many advantages such as compact structure, small mass, small volume, large carrying capacity and low operating noise, so it is often used in planetary gear reducers. , speed increaser, differential and reversing mechanism and other special purposes. In order to design an excellent planetary gear train structure, the isomorphism determination of the planetary gear train is a very important link. The isomorphism determination can enable people to avoid a large number of repetitive structures during design, and effectively reduce design time and effort. [0003] At present, many scholars at home and abroad have done a lot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17
CPCY02T90/00
Inventor 陈天鹏孙伟
Owner WUHAN UNIV OF SCI & TECH