Reliability Evaluation Method of Space Traveling Wave Tube Based on Multi-source Data Fusion

Abstract

A method for evaluating the reliability of space traveling wave tubes based on multi-source data fusion, the method includes the following steps: S1, processing the collected data and extracting features; S2, according to the results obtained in step S1, calculating the established The marginal probability of the bottom input node of the Yasian network model; S3, according to the marginal probability of the bottom input node obtained in step S2, calculate the marginal probability of the input node of other layers of the Bayesian network model; S4, the calculation result obtained according to step S3 and The Bayesian network model of the traveling wave tube calculates the reliability point estimation results of the traveling wave tube. The present invention can also use the real-time on-orbit telemetry data to realize the operation reliability evaluation of the traveling wave tube while evaluating the static reliability of the product. in accordance with.

Description

technical field [0001] The invention relates to the field of evaluating the reliability of a spacecraft stand-alone product by using multi-source data, in particular to a method for evaluating the reliability of a space traveling wave tube based on multi-source data fusion. Background technique [0002] The space traveling wave tube is the key component of the spaceborne transponder and the spaceborne synthetic aperture radar transmitter. Its function is mainly to realize the amplification of microwave power, and its reliability is very important for the stable operation of the whole satellite system. Due to the complex structure of the traveling wave tube, many processes and components are involved, and the price is high, it is a small sample product. [0003] The reliability evaluation results obtained by traditional statistical methods are mostly based on the failure time, and use a large number of life tests or accelerated life tests to obtain product failure data, and t...

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Problems solved by technology

Due to the complex structure of the traveling wave tube, many processes and parts are involved, and the price is expensive, it is a small sample product

[0003] The reliability evaluation results obtained by traditional statistical methods mostly take the failure time as the statistical object, use a large number of life tests or accelerated life tests to obtain product failure data, and then assume that the life distribution obeys the exponential distribution or Weibull distribution. Evaluate the reliability of the product at the end of its life. Due to the short test time and the limited number of failures, the evaluation results are relatively conservative

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