Hierarchical fusion diagnosis method and system for health parameters of complex spacecraft thermal control system

Abstract

The invention belongs to the technical field of spacecraft health diagnosis and analysis, and particularly relates to a health parameter hierarchical fusion diagnosis method and system for a complex spacecraft thermal control system. The diagnosis method comprises the following steps: constructing a multi-level evaluation parameter model of the thermal control system so as to carry out monitoring and combined diagnosis on key index parameters from three aspects of single-machine design key indexes, single-machine equipment health characterization and system-level comprehensive state characterization; designing a thermodynamic extreme working condition test data boundary model; constructing a single-index parameter long-term state monitoring curve analysis model and a single-index parameter feature model; a correlation feature model of multi-element index parameters in a space flight scene is constructed, and interpretation analysis and consistency comparison data are provided for multiple indexes, single-machine comprehensive states and system-level comprehensive states. According to the invention, the comprehensive credible evaluation of the associated core indexes in the single index-single machine-system level can be realized, and a discrimination method can be provided for intelligently recognizing the abnormal state in the flight scene.

Description

technical field [0001] The invention belongs to the technical field of spacecraft health diagnosis and analysis, and in particular relates to a method and system for grading and merging health parameters of complex spacecraft thermal control systems. Background technique [0002] With the advancement of technology in my country's aerospace and other fields, the long-life and high-reliability requirements for complex spacecraft such as spacecraft and space stations have been put forward. Research key technologies for fault monitoring and evaluation of complex spacecraft such as space stations as soon as possible, gradually realize tasks such as independent perception, diagnosis, decision-making, and execution, improve the efficiency of fault diagnosis and evaluation, improve the safety and reliability of space station operations, and strengthen complex spacecraft for military products Its adaptability and operational analysis capability in combat space can meet the needs of fut...

AI Technical Summary

Problems solved by technology

Most of the current fault monitoring and evaluation methods for the thermal control system of space stations can only perform post-analysis of shallow test data, and have not formed the ability to dig deep into the deep causality and logical relationships behind the data. For thermal vacuum and other The unified management and utilization of extreme test methods, test process and conclusion data are relatively lacking, and a lot of valuable experience information has been missed as a result.

At the same time, due to the failure to make full use of the test process and data, it is likely to cause unforeseen problems in the development and application process, seriously affecting the development progress and quality control of R&D.

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