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A Diagnosability Analysis Method for Uncertain Systems

A technology of uncertainty and analysis methods, applied in the field of diagnosability analysis of uncertain systems, which can solve problems such as inability to analyze and loss of accuracy of analysis results.

Active Publication Date: 2019-06-18
BEIJING INST OF CONTROL ENG
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  • Abstract
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Problems solved by technology

In fact, simply treating uncertainty as a random distribution will cause the analysis results to lose accuracy, and this method cannot analyze the impact of uncertainty

Method used

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  • A Diagnosability Analysis Method for Uncertain Systems
  • A Diagnosability Analysis Method for Uncertain Systems
  • A Diagnosability Analysis Method for Uncertain Systems

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Embodiment Construction

[0064] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the public implementation of the present invention in detail with reference to the accompanying drawings.

[0065] The method for analyzing the diagnosability of an uncertain system according to an embodiment of the present invention fully considers the influence of interference factors such as process noise, observation noise, and uncertainty in the determination process, and provides the multivariate probability distribution statistics of the control system Model, detectable uncertainty radius and isolating uncertainty radius, and based on the multivariate probability distribution statistical model and uncertainty radius, the detectability analysis index and the isolation analysis index considering uncertainty are obtained, and based on consideration Uncertain detectability analysis indicators and isolation analysis indicators perform q...

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Abstract

The present invention discloses an analysis method of diagnosability of an uncertainty system. The method provided by the invention fully considers influences of interference factors such as process noise, observation noise and uncertainty in an analysis process, a multivariate probability distribution statistical model of a control system is given to obtain a detectable uncertainty radius and anisolative uncertainty radius, a detectability analysis index and an isolability analysis index considering the uncertainty can be obtained based on the multivariate probability distribution statistical model and the uncertainty radiuses, and diagnosability quantitative determination is performed based on the detectability analysis index and the isolability analysis index considering the uncertainty, so that the stability and the design accuracy of the complex control system can be ensured.

Description

Technical field [0001] The invention belongs to the technical field of spacecraft control, and particularly relates to a diagnostic analysis method of an uncertain system. Background technique [0002] In the past two decades, scholars at home and abroad have made great achievements in the research of spacecraft control system fault diagnosis technology. As an important prerequisite for the design of fault diagnosis methods, fault diagnosability has begun to attract scholars' attention. By analyzing the diagnosability of the system, we can know the diagnosing ability of the system for different faults, and provide theoretical guidance for improving the diagnosable performance and design level of the system itself in the design stage. However, the research on fault diagnosis analysis is still in its infancy. Therefore, it is very necessary to carry out further research on the diagnosability of uncertain systems. [0003] Uncertainty (including: model error, observation and proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0262G05B23/0281
Inventor 王大轶符方舟刘成瑞刘文静何英姿邢琰李文博
Owner BEIJING INST OF CONTROL ENG
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