Analysis method of diagnosability of uncertainty system

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

Active Publication Date: 2018-02-16
BEIJING INST OF CONTROL ENG
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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

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  • Analysis method of diagnosability of uncertainty system
  • Analysis method of diagnosability of uncertainty system
  • Analysis method of diagnosability of uncertainty system

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

[0065] The diagnosability analysis method of an uncertain system described in the 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 gives the multivariate probability distribution statistics of the control system model, the detectable uncertainty radius and the isolatable uncertainty radius, and based on the multivariate probability distribution statistical model and the uncertainty radius, the detectability analysis index and the isolation analysis index considering the uncertainty are obtained, and based on the consideration Detectability analysis index and isolation analysis index of uncertaint...

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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, in particular to a diagnosability 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 on fault diagnosis technology of spacecraft control system. As an important prerequisite for the design of fault diagnosis methods, fault diagnosability has attracted the attention of scholars. By analyzing the diagnosability of the system, we can know the diagnosability of the system for different faults, and provide theoretical guidance for improving the diagnosability and design level of the system itself in the design stage. However, the current research on fault diagnosability analysis is still in its infancy. Therefore, it is very necessary to carry out further in-depth research on the diagnosability of uncertain systems. [0003] Uncertainty (including: model error, observation...

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Application Information

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Patent Type & Authority Applications(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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