Significance testing method for rolling bearing performance variation process

Abstract

The invention discloses a significance testing method for a rolling bearing performance variation process. The method includes: regularly sampling the performance of a rolling bearing during service to obtain an r-th time sequence, equally dividing the r-th time sequence into D subsequences, and setting a d-th subsequence data as Xrd; processing the subsequences by bootstrapping to obtain origin moments of all orders of each subsequence; establishing a probability density function of each subsequence according to the principle of maximum entropy; selecting a reference time sequence; establishing a posterior probability density function; establishing contact ratio; giving a significance level alpha; if the contact ratio is smaller than 1-alpha, determining the d-th subsequence Xrd in the r-th time sequence varies significantly; if not, determining no significant variation occurs. By the method under the condition that probability distribution and trend prior information is absent, variation information of the performance of the rolling bearing during service can be checked timely, failure risk of the bearing is found so that measures can be taken as soon as possible, and serious accidents are avoided.

Description

technical field [0001] The invention belongs to the field of rolling bearing performance testing, and relates to a method for testing the significance of the rolling bearing performance variation process. Background technique [0002] Rolling bearings are widely used key mechanical basic components, and play an important joint role in national infrastructure construction, national economic operation and national defense security. With the rapid development of aerospace, high-speed passenger cars and new energy, many rolling bearings, such as aerospace bearings, ship bearings, aircraft carrier bearings, nuclear reactor bearings, high-speed railway bearings and wind turbine bearings, are widely used in engineering and academia. , and its service performance is increasingly concerned to ensure the safe and reliable operation of the working host. During the service period when the rolling bearing is in normal operation and the performance meets the requirements, it is urgent to...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for testing the significance of the variation process of rolling bearing performance, so as to solve the problem of testing whether the performance of rolling bearings is deteriorated if the prior information such as probability distribution and trend is unknown or not known.

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