Neural network-based spacecraft attitude control nozzle fault intelligent diagnosis system and method

Abstract

The invention relates to a neural network-based spacecraft attitude control nozzle fault intelligent diagnosis system and method. The system comprises a spacecraft attitude control nozzle fault data generation module and a fault diagnosis module; the fault data generation module is used for obtaining the fault information of a spacecraft attitude control nozzle as well as a corresponding spacecraft attitude error curve and the output curve of a controller during a spacecraft attitude control nozzle fault; with the fault data generation module adopted, a large amount of fault information can beobtained so as to be used for the training of the fault diagnosis module; the fault diagnosis module is used for the fault diagnosis of the spacecraft attitude control nozzle; the fault diagnosis module is based on a convolutional neural network technology; the output information of the fault diagnosis module is the working state of the attitude control nozzle; and the fault type of the spacecraft attitude control nozzle can be determined through the fault diagnosis module. With the neural network-based spacecraft attitude control nozzle fault intelligent diagnosis system and method of the invention adopted, the fault type of the spacecraft attitude control nozzle can be diagnosed accurately through the fault diagnosis module; the reliability of a spacecraft attitude control system is enhanced; and the fault resisting capacity of the spacecraft attitude control system is improved.

Description

technical field [0001] The invention relates to a spacecraft fault diagnosis system, in particular to a spacecraft attitude control nozzle fault diagnosis system and method based on a convolutional neural network. Background technique [0002] In recent years, with the development of spacecraft technology, spacecraft as an opto-mechanical integration instrument, due to its large scale, high complexity, limited resources and human intervention capabilities of the spacecraft, and the increasingly harsh space environment and the existence of a large number of Uncertainty factors, etc., all of these pose challenges to the spacecraft fault diagnosis technology, it is difficult to carry out effective maintenance, and the system often runs abnormally or even fails. Therefore, spacecraft fault diagnosis technology plays a very important role in improving the reliability, safety and effectiveness of spacecraft, and has become the main research direction in the aerospace field. Fault...

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Problems solved by technology

[0002] In recent years, with the development of spacecraft technology, spacecraft as an opto-mechanical integration instrument, due to its large scale, high complexity, limited resources and human intervention capabilities of the spacecraft, and the increasingly harsh space environment and the existence of a large number of Uncertainty factors, etc., all of these pose challenges to the spacecraft fault diagnosis technology, it is difficult to carry out effective maintenance, and there are often situations where the system operates abnormally or even fails

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