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Diagnostic quantification method with consideration of incomplete failure of spacecraft control system

A technology of control system and quantification method, which is applied in the field of diagnosability quantification considering non-complete failure faults of spacecraft control systems, and can solve problems that cannot be applied to non-complete failure faults, do not consider the influence of uncertainty, and cannot give quantitative results, etc. question

Active Publication Date: 2018-01-05
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0012] The technical problem of the present invention is to overcome the deficiencies of the prior art, provide a diagnosable quantification method considering the non-complete failure of the spacecraft control system, and overcome the inability of the existing method to give quantitative results and the influence of uncertainty , cannot be applied to incomplete failure faults and other deficiencies

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  • Diagnostic quantification method with consideration of incomplete failure of spacecraft control system
  • Diagnostic quantification method with consideration of incomplete failure of spacecraft control system
  • Diagnostic quantification method with consideration of incomplete failure of spacecraft control system

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Embodiment Construction

[0048] 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.

[0049] Aiming at the specific characteristics of non-complete failure faults, the present invention proposes a novel quantification method by introducing Bhattacharyachian distance and using the principle of distance similarity, and realizes the quantification of the diagnosability of non-complete failure faults under the influence of uncertainty. It not only provides a possible solution and idea for maximizing the autonomous fault diagnosis capability of my country's new generation of deep space exploration spacecraft: moving the focus of improving the spacecraft's on-orbit fault diagnosis capability to the design stage; The engineering practicality of the integrated design of spacecraft model functions, performance, reliabil...

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Abstract

The present invention discloses a diagnostic quantification method with the consideration of a incomplete failure of a spacecraft control system. A diagnostic quantification problem is transformed into a multivariate distribution similarity judgment problem in mathematical statistics, and an equivalent space model of the incomplete failure is obtained. Then concrete judgment criteria of the detectability and isolability of the incomplete failure are given. Finally, according to the judgment criteria, a diagnostic quantification index of the incomplete failure is proposed by using a Bhattacharyya distance, and an analysis result is obtained based on the diagnostic quantification index. The influence of system uncertainty in spacecraft control system on-orbit actual work is considered, according to the obtained result, a designer can conveniently understand weak links of the system, the guide of the design of a diagnosis algorithm and system configuration is facilitated, thus the fault diagnosis ability of the spacecraft control system can be improved to the maximum at a ground design stage, and finally a target of improving the system overall comprehensive design ability is achieved.

Description

technical field [0001] The invention belongs to the technical field of spacecraft control, and in particular relates to a diagnosability quantification method considering non-complete failure faults of a spacecraft control system. Background technique [0002] Due to the complexity of the spacecraft structure and the inevitable impact of the space environment (including: high and low temperature differences, electromagnetic interference, space particle radiation, etc.), the reliability of each subsystem and component will be reduced, which is easy to induce failure, and the failure occurs Difficult to repair afterwards. Compared with other subsystems, due to the complex working mode of the spacecraft control system, the probability of failure increases sharply; at the same time, due to the importance of undertaking tasks, once a failure occurs, it will cause great harm. [0003] Due to the seriousness of the problems caused by the failure of the spacecraft control system an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
Inventor 李文博王大轶刘成瑞刘文静何英姿邢琰符方舟
Owner BEIJING INST OF CONTROL ENG
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