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Diagnostic evaluation method considering disturbing influence for satellite sensor fault

A technology of interference impact and evaluation method, applied in the field of satellite control, which can solve problems such as failure to explain the difficulty of fault detection and isolation, and failure to consider modeling uncertainty.

Active Publication Date: 2014-04-02
BEIJING INST OF CONTROL ENG
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  • Abstract
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  • Claims
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Problems solved by technology

None of the techniques used above considered the influence of interference factors such as noise and modeling uncertainty; and the obtained evaluation results are qualitative, that is, it can only explain whether the fault can be detected and isolated, but not whether the fault is detected and isolated. Ease of isolation

Method used

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  • Diagnostic evaluation method considering disturbing influence for satellite sensor fault
  • Diagnostic evaluation method considering disturbing influence for satellite sensor fault
  • Diagnostic evaluation method considering disturbing influence for satellite sensor fault

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Embodiment Construction

[0031] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] The invention provides an evaluation method of fault detectability and isolation for a class of satellite sensor mathematical models containing interference factors such as noise and modeling uncertainty.

[0033] Such as figure 1 As shown, the satellite sensor fault diagnosability evaluation method of the present invention comprises the following steps:

[0034] (1) Based on model standardization and equivalent spatial transformation processing methods, preprocessing the given satellite sensor to obtain the preprocessing model;

[0035] The mathematical model of the satellite sensor is:

[0036] x ( k + 1 ) = Ax ...

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Abstract

The invention discloses a diagnostic evaluation method considering disturbing influence for a satellite sensor fault. The diagnostic evaluation method comprises the following steps: aiming at a satellite sensor system influenced by interference factors such as noise and modeling nondeterminacy, respectively taking vector distance similarity and vector direction similarity as evaluation indexes to realize the detection and isolability quantitative evaluation of the sensor fault through deploying conditions of mathematical description, system model and a satellite sensor of a fault mode. The diagnostic evaluation method provided by the invention can bring the fault diagnosis of the satellite sensor forward to a design stage on the condition of not depending on any fault diagnosis algorithm, and guide the optimal configuration of the satellite sensor.

Description

technical field [0001] The invention relates to a fault diagnosability evaluation method of a satellite sensor considering the influence of interference, and belongs to the field of satellite control. Background technique [0002] Satellite sensors are the general term for satellite attitude measurement components, mainly including star sensors, infrared earth sensors, gyroscopes, etc. As an important measurement element in the control system, once the satellite sensor fails, it will seriously affect the accuracy of satellite attitude control, and even cause attitude rollover in severe cases. With the increasing scale and complexity of sensor integration and the influence of unpredictable space environment factors, it is inevitable to fail. In order to minimize the impact of faults and overcome the shortcomings of insufficient product reliability, it is necessary to consider the impact of faults in the sensor design process, and incorporate fault diagnosability as an indica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 王大轶李文博刘成瑞刘文静
Owner BEIJING INST OF CONTROL ENG
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