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A Reliability Evaluation Method of Momentum Wheel Based on Information Fusion

A momentum wheel and reliability technology, which is applied in the field of momentum wheel reliability evaluation based on information fusion, can solve problems such as insufficient use of momentum wheel reliability analysis information, and achieve the effect of improving robustness

Inactive Publication Date: 2021-01-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 method for evaluating the reliability of a momentum wheel based on information fusion. In the present invention, by analyzing the performance parameters affected by the external environment, the remaining oil quantity of the lubrication system which is less affected by the external environment is selected as the key performance index, and a suitable degradation model is established through degradation data analysis, and a joint similarity model is constructed according to the nature of the degradation model. In this way, the performance degradation data information and a small amount of sample life information are successfully fused, and the parameter estimation in the degradation model is completed by using the maximum likelihood estimation method. Finally, the reliability evaluation of the momentum wheel is completed on the basis of the fusion information. The invention makes full use of multi-source information in the reliability evaluation of the 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/04
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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