Spectrum diagnosing and identifying method of early fault of momentum wheel

Abstract

The invention is used for analyzing spectrum characteristics and a change rule of a momentum wheel by analyzing a time domain and a frequency domain of the dynamic response of the momentum wheel in different running time and is also used for analyzing the causes of spectrum peak generation and spectrum peak change by combining the dynamic characteristic analysis of parts of the momentum wheel and the pulse frequency calculation analysis of bearing parts. Thereby, the early fault of the momentum wheel is identified more scientifically and accurately; and particularly, the cause of the fault is diagnosed in time. On one hand, effective remedial measures can be adopted in time for avoiding unnecessary momentum wheel discard; and on the other hand, the research of fault mode analysis and the like on the momentum wheel can be carried out. The invention can be used for accurately positioning fault points of the momentum wheel, providing more scientific, accurate and effective improving measures, and enhancing the reliability of subsequent products.

Description

Technical field [0001] The invention mainly relates to a detection method for diagnosing the cause of the early failure of the momentum wheel. Background technique [0002] At present, momentum wheels are widely used in various satellites, spacecraft and other aerospace vehicles. Gyro fixed axis? And the reaction torque generated by the speed change to stabilize or change the attitude of the satellite; as the key single machine of the satellite, its performance directly affects the control accuracy and reliability of the satellite. Once the momentum wheel fails, it will seriously affect the main functions of the satellite, and even cause the whole Star scrapped. Moreover, the delivery of the momentum wheel product to the satellite assembly requires various ground environmental test assessments for six months to one year. The cycle is long and the test cost is huge. Once the momentum wheel fails, not only the various tests have to be redone, but even the satellite is delayed. L...

AI Technical Summary

Problems solved by technology

[0004] (1) Since the momentum wheel is a relatively complex system, there are many reasons for the magnitude and change of the current (power consumption), and sometimes it is a combination of multiple reasons. The existing technology only identifies the fault, and cannot identify the cause of the fault. Scientific and reasonable diagnosis, especially the inability to locate the early cause of the failure; in the ground test, once the momentum wheel fails, it is only possible to disassemble the momentum wheel and test and analyze the components of the momentum wheel Find the cause of the failure; once the momentum wheel is disassembled, it means that some parts will be scrapped, and the previous inspections and tests will be in vain

[0005] (2) When the magnitude and change of the momentum wheel current is at the fault critical point, it is difficult to judge the cause and whether the momentum wheel will fail in the future through empirical analysis, and most of them continue to test. On the one hand, when the fault is obvious, it is difficult to correct The initial cause of the failure is located; on the other hand, due to failure to take effective measures in time, unnecessary momentum wheels are often scrapped

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