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Copula function-based reliability analysis method for a harmonic reducer for an industrial robot

A harmonic reducer and industrial robot technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of underestimation, failure to truly reflect the relationship between structural systems, overestimation of system reliability, etc., and achieve high calculation efficiency effect

Inactive Publication Date: 2019-05-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a Copula function-based reliability analysis method for harmonic reducers for industrial robots, aiming to solve the problem that the existing methods only target a certain failure mode, or treat each failure mode as independent, and the result It cannot truly reflect the relationship between structural systems, and will underestimate or overestimate the technical problems of system reliability

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  • Copula function-based reliability analysis method for a harmonic reducer for an industrial robot
  • Copula function-based reliability analysis method for a harmonic reducer for an industrial robot
  • Copula function-based reliability analysis method for a harmonic reducer for an industrial robot

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Embodiment Construction

[0048]It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0049] Such as figure 1 Shown, the industrial robot based on Copula function of the present invention uses the harmonic reducer reliability analysis method, comprises the following steps:

[0050] S1. Obtain the fault data of the harmonic reducer for industrial robots, and determine the failure mode of the harmonic reducer for industrial robots;

[0051] In this embodiment, the structure and transmission principle of the harmonic reducer for industrial robots are as follows figure 2 , 3 As shown, the harmonic reducer for industrial robots consists of a rigid spline 1, a flexible spline 2 and a wave generator 3, wherein the wave generator 3 consists of a cam 31 and a flexible bearing 32. When working, the servo motor drives the cam 31 to rotate, the flexible bearing 32 and the flex spline 2 produce elastic deformati...

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Abstract

The invention discloses an industrial robot harmonic reducer reliability analysis method based on a Copula function. The method comprises: determining a failure mode of a harmonic reducer for an industrial robot; establishing a limit state function of the failure mode; determining the distribution type and distribution parameters of uncertain factors, calculating the failure probability of a failure mode, determining an alternative Copula function according to the correlation among the failure modes, selecting an optimal Copula function, determining the parameter value of the optimal Copula function, and calculating the reliability of the harmonic reducer for the industrial robot considering multi-failure mode correlation. According to the method, the main failure mode of the harmonic reducer for the industrial robot is determined, the reliability of the harmonic reducer for the industrial robot under the correlation of multiple failure modes is analyzed, and the real condition of a structural system can be described; And the calculation efficiency is improved on the premise of ensuring the precision.

Description

technical field [0001] The invention belongs to the technical field of reliability analysis of core components of industrial robots, and in particular relates to a reliability analysis method of a harmonic reducer for industrial robots based on a Copula function. Background technique [0002] Industrial robot is a highly developed product of automation technology. It integrates various disciplines such as computer, cybernetics, mechanism, information and sensing technology, artificial intelligence and bionics. It is an indispensable automation equipment in the field of advanced manufacturing technology. Industrial robots can significantly improve the labor shortage caused by changes in the domestic population structure and the gradual increase in labor costs in the manufacturing industry, improve production efficiency, reduce costs, and enhance core competitiveness. Therefore, they are widely used in automobile assembly manufacturing, electronic appliances, and food processin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 黄洪钟张乙钱华明王弘毅李彦锋李本黄鹏谢非
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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