A Quantitative Analysis Method for Fault Diagnosis of Spacecraft Attitude Control System

Abstract

The invention discloses a method for quantitative analysis of fault diagnosability of a spacecraft attitude control system, which includes setting a discrete state space model of the spacecraft attitude control system, performing multiple sampling and variable reorganization on the discrete state space model according to time series , to obtain the time stacking equation; carry out model normalization processing on the time stacking equation, and obtain the system standard static equation; construct the detectability quantitative evaluation statistical model of the spacecraft attitude control system fault; construct the spacecraft attitude control system fault detectability Statistical models for quantitative evaluation of isolation. The present invention realizes the quantitative judgment of the diagnosability of the faults of the spacecraft attitude control system by constructing the statistical model of the detectability quantitative evaluation of the faults of the spacecraft attitude control system and the statistical model of the quantitative evaluation of the isolation, and provides the difficulty of fault detection and isolation To improve the fault diagnosability and identification ability. The invention is used for analyzing the failure of the spacecraft attitude control system.

Description

technical field [0001] The invention relates to the technical field of spacecraft, in particular to a failure analysis method for a spacecraft attitude control system. Background technique [0002] The spacecraft attitude control system undertakes the tasks of attitude control, solar panel and antenna drive control, and is one of the most important and complex systems in the spacecraft. Due to the importance of the mission, once the attitude control system fails, the consequences will be very serious. If the attitude is out of control, the satellite business will be interrupted, the sailboard will not be able to align with the sun, the satellite power supply will not be normally supplied, or the propellant will be exhausted abnormally. The on-orbit operation quality of the spacecraft attitude control system is one of the key factors affecting the life and reliability of the spacecraft. [0003] In order to ensure the on-orbit safety and operation quality of the spacecraft a...

AI Technical Summary

Problems solved by technology

However, since the attitude control system is a large and complex system involving multi-disciplinary and multi-field technologies, and it has been flying for a long time in a harsh and complex space environment, coupled with the limitations of components, raw materials and processing levels, it is inevitable that there will be problems during orbital flight. Sudden or gradual deterioration of system health due to a variety of failures

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