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Ka phased-array antenna on-orbit reliability evaluation method based on Bayesian network

A phased array antenna, Bayesian network technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as lack of test samples

Active Publication Date: 2020-05-19
CHINA AEROSPACE STANDARDIZATION INST
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Problems solved by technology

However, because the Ka phased array antenna has the characteristics of small samples, long life, high reliability, and no failure data, and lacks enough test samples, the traditional large-sample life data statistical method is used to solve the reliability modeling of the Ka phased array antenna. It is very difficult to analyze the problem

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  • Ka phased-array antenna on-orbit reliability evaluation method based on Bayesian network
  • Ka phased-array antenna on-orbit reliability evaluation method based on Bayesian network
  • Ka phased-array antenna on-orbit reliability evaluation method based on Bayesian network

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Embodiment Construction

[0044] The first step is to collect Ka phased array antenna on-orbit telemetry data, ground reliability and life test data, ground test data, component failure rate data, machine-level failure modes, component-level failure modes, component-level failure modes and Related fault criteria. Provide data input for the establishment and calculation of the reliability evaluation model of the subsequent Ka phased array antenna.

[0045] The second step is to use the Bayesian network to establish the Ka phased array antenna on-orbit reliability evaluation model topology, the specific process is as follows figure 1 Shown:

[0046](1) The whole machine-level failure mode, component-level failure mode, and component-level failure mode of the Ka phased array antenna collected in step 1 are used as the upper-level nodes, middle-level nodes and bottom-level nodes in the topology structure;

[0047] (2) Through the analysis of the fault propagation mechanism of the Ka phased array antenna,...

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Abstract

This Ka phased-array antenna on-orbit reliability evaluation method based on the Bayesian network is different from a traditional probability statistics method based on large sample failure data, anda reliability evaluation model is built based on product failure mode and failure mechanism analysis; reliability evaluation calculation is carried out by fusing and utilizing product design data, ground test / test data, on-orbit data and other multi-source data. Therefore, the method is more suitable for evaluating the reliability of the Ka phased-array antenna with long service life, high reliability and no failure data, and can further accurately capture the on-orbit operation characteristics of the Ka phased-array antenna. In addition, the method has universality and can be popularized andapplied to reliability evaluation of other similar spacecraft single-machine products.

Description

technical field [0001] The invention relates to an on-orbit reliability evaluation method of a key load stand-alone satellite navigation system, belonging to the technical field of system reliability and safety. Background technique [0002] The Beidou satellite navigation system is an important national space infrastructure that provides all-weather, all-time, high-precision positioning, navigation and timing services for global users, and is an important guarantee for my country's national security and economic and social development. [0003] The Ka phased array antenna is the core of realizing the satellite navigation function, and its health status directly affects the service performance of the system. However, because the Ka phased array antenna has the characteristics of small samples, long life, high reliability, and no failure data, and lacks enough test samples, the traditional large-sample life data statistical method is used to solve the reliability modeling of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06K9/62
CPCG06Q10/0639G06F18/24155G06F18/251
Inventor 郑紫霞李若昕龙东腾郑恒程海龙张锐李岩角淑媛周波龚佩佩王小宁王博伟高敏王晋婧冉迎春申林
Owner CHINA AEROSPACE STANDARDIZATION INST
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