Tolerance optimization allocation method based on tolerance grade and genetic algorithm

A technology of tolerance level and genetic algorithm, which is applied in the field of computer-aided tolerance design, can solve the problems of high processing cost of tolerance distribution results, tolerance values ​​that are not standard tolerance values, etc.
CN102622495BActive Publication Date: 2014-12-03BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2014-12-03

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Abstract

The invention discloses a tolerance optimization allocation method based on a tolerance grade and a genetic algorithm, comprising the following steps: (1) creating a tolerance optimization mathematical model; (2) creating a standard tolerance database; (3) encoding based on the tolerance grade; (4) determining an adaptability function of the genetic algorithm; (5) setting a genetic operator; (6) performing genetic evolution; and (7) decoding to obtain a corresponding tolerance grade and inquiring a corresponding tolerance value. The method disclosed by the invention realizes the tolerance optimization allocation in the product design by using a computer, thereby replacing the manual distribution, improving the efficiency and saving the time; meanwhile, the method performs the optimization allocation through the genetic algorithm, serves the minimum processing cost as an optimization target and reduces the processing cost of products. Therefore, the method has good practical value and extensive application prospect in the technical field of computer aided tolerance design.
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Description

technical field

[0001] The invention relates to a tolerance optimization distribution method based on tolerance grades and genetic algorithms, which is mainly used in product design to use modern intelligent optimization algorithms to distribute tolerances of parts, and belongs to the technical field of computer-aided tolerance design. Background technique

[0002] Commonly used tolerance distribution methods include equal tolerance method, equal precision method and tolerance distribution based on genetic algorithm, but because the equal tolerance method and the equal precision method do not consider the problem of tolerance processing cost and do not achieve the purpose of optimization, the present invention is based on genetic algorithm. Algorithm for tolerance optimization allocation.

[0003] In the traditional optimization of tolerance allocation using genetic algorithm, the tolerance value of each tolerance ring is encoded. The higher the requirement, the longer the ...

Claims

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