Similar product information-based bayesian reliability evaluation method of small number samples

A product information, Bayesian estimation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as large reliability model parameters, few samples of products of the same model, and lack of stable life data.
CN106570281AActive Publication Date: 2017-04-19SHANGHAI RADIO EQUIP RES INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI RADIO EQUIP RES INST
Publication Date
2017-04-19

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Abstract

The invention relates to a similar product information-based bayesian reliability evaluation method of small number samples. The method comprises the steps of (S1) carrying out similarity scoring on similar products and determining a prior sample set; (S2) acquiring prior information, which includes failure life data and pseudo failure life data of the similar products; (S3) determining a prior distribution form; (S4) checking the failure mechanism consistency of the similar products; and (S5) determining prior distribution and posterior distribution and achieving bayesian reliability evaluation. According to the method provided by the invention, the sample quantity of the small number samples is effectively improved; and the prior information includes the failure life data and the pseudo failure life data and a two-parameter bayesian reliability evaluation problem is converted into single-parameter bayesian reliability evaluation, so that the bayesian reliability evaluation accuracy of the products is effectively improved and the calculation method of bayesian reliability parameter evaluation is simplified.
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Description

technical field

[0001] The invention relates to a small sample product Bayesian reliability evaluation method, specifically a small sample product Bayesian reliability evaluation method based on similar product information, and belongs to the technical field of reliability modeling and reliability evaluation. Background technique

[0002] Satellites play a very important role in the aerospace field. Their reliability and life directly affect the satellite's attitude control, measurement accuracy and other indicators, and are the key to the success of space missions. Satellites are in orbit for a long time, which requires that the payload of the satellite must have high reliability and long life. Therefore, for satellite payloads, corresponding reliability work must be carried out at all stages of the life cycle. However, due to the high cost, complex system, and small sample size of the satellite payload itself, it is impossible to use a large number of products for life te...

Claims

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