A satellite Bayesian network health determination method based on ground test data

A Bayesian network, ground testing technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of multi-dimensional parameter quantification, relying on artificial experience and knowledge, and high data dimensions, and achieve the effect of an efficient method

Active Publication Date: 2017-01-04
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

However, due to the large amount of satellite ground test data and high data dimensions, the overall quantification has not been carried out based on multi-dimensional parameters, which cannot reflect the overall health status of the satellite
At the same time, relying too much on artificial experience and knowledge makes it difficult to make quick and accurate decision-making responses to abnormal phenomena

Method used

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  • A satellite Bayesian network health determination method based on ground test data
  • A satellite Bayesian network health determination method based on ground test data
  • A satellite Bayesian network health determination method based on ground test data

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Embodiment

[0030] The implementation process of the present invention is described in detail below. In order to simplify the analysis, only the impact of the two on-board equipment, the battery pack and the momentum wheel, on the health status of the entire satellite is considered, and a Bayesian network for determining the health status of the satellite is established, such as figure 2 shown. And take the two test points of cell voltage and group A voltage as examples to illustrate the Bayesian network probability calculation and Bayesian inference process. The Bayesian network including the two root nodes of cell voltage and group A voltage is as follows image 3 shown.

[0031] (1) Establish a Bayesian network for determining the health status of the satellite to be evaluated.

[0032] The established Bayesian network for determining satellite health status is as follows: figure 2 As shown, the whole star state is the leaf node of the Bayesian network, and its parent nodes are the...

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Abstract

The invention discloses a satellite Bayesian Network health determination method based on ground test data and provides a satellite health status comprehensive and quantitative determination method based on ground test data. From the prospective of historical data, probabilities between a satellite and related parameters as well as between the satellite and onboard equipment are mined; features of data under actual conditions are fully embodied; implicit association between parameters and system health level are mined through multi-parameter conditional probabilities; the system health level is truly indicated. The health status of the satellite during a test phase can be estimated accurately, unified health level of the satellite is quantitated from multi-index telemetry parameters, and the effective method is provided for ground test and analysis of the satellite.

Description

technical field [0001] The invention relates to a satellite health determination method, in particular to a satellite Bayesian network health determination method based on ground test data, and belongs to the technical field of satellite ground stage fault prediction and health management. Background technique [0002] The ground test data of satellites play a very important role in determining the state of satellites before launching, and making launch decisions. Combined with the ground test data before satellite launch, ground testers and satellite designers can grasp the overall health status of the satellite before launch, so as to further take corresponding ground test safeguard measures to ensure the good performance of the satellite in the active stage and in-orbit operation stage after launch. state. During the satellite ground test, the test data is an important basis for reflecting whether the current operation status of the satellite is normal or not. The metho...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 孙波张雷罗荣蒸胡勇顾佳琦
Owner BEIJING INST OF SPACECRAFT SYST ENG
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