A reliability evaluation method of momentum wheel based on information fusion

A momentum wheel and reliability technology, which is applied in the directions of instrumentation, design optimization/simulation, calculation, etc., can solve the problem of insufficient utilization of the reliability analysis information of the momentum wheel, and achieve the effect of improving the robustness.

Inactive Publication Date: 2018-12-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, a method for evaluating the reliability of momentum wheels based on information fusion provided by the present invention solves the problem of insufficient use of reliability analysis information of momentum wheels

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  • A reliability evaluation method of momentum wheel based on information fusion
  • A reliability evaluation method of momentum wheel based on information fusion
  • A reliability evaluation method of momentum wheel based on information fusion

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Embodiment Construction

[0026] Specific embodiments of the present invention are described below, so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes will be obvious Yes, all inventions and creations using the concept of the present invention are included in the protection.

[0027] Such as figure 1 As shown, a method for evaluating the reliability of momentum wheels based on information fusion includes the following steps:

[0028] S1. Analyze the performance failure mechanism of the momentum wheel, and determine the key performance degradation parameters of the momentum wheel.

[0029] The failure of the momentum wheel is related to many factors, such as bearing temperature, lubrication sys...

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Abstract

The invention discloses a momentum wheel reliability evaluation method based on information fusion. By analyzing the magnitude of the performance parameter influenced by the external environment, choosing the remaining oil quantity of the lubricating system which is less affected by the external environment as the key performance index, through the analysis of degradation data, the joint likelihood function is constructed according to the properties of the degradation model, which successfully fuses the performance degradation data information with a small amount of sample lifetime information, estimates the parameters of the degradation model by using the maximum likelihood estimation method, and finally evaluates the reliability of the momentum wheel on the basis of the fused information. The invention makes full use of multi-source information in the reliability evaluation of momentum wheel, and improves the robustness of the evaluation result.

Description

technical field [0001] The invention relates to the technical field of reliability analysis, in particular to a method for evaluating the reliability of momentum wheels based on information fusion. Background technique [0002] The momentum wheel is an important inertial actuator in the satellite attitude control system. Its reliability determines the reliability of the whole satellite to a large extent, and its reliability evaluation has far-reaching significance. However, due to reasons such as high reliability, long life, small samples, and complex failure mechanisms of momentum wheels, traditional reliability evaluation methods are difficult to apply. Most of the existing reliability evaluations for momentum wheels start from the perspective of performance degradation. Degradation data to establish a suitable degradation model, and then achieve the purpose of reliability assessment by means of extrapolation. However, although this method can effectively utilize performa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/04
Inventor 黄洪钟喻康李贺李翔宇李彦锋钱华明余奥迪
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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