Spectrum Diagnosis and Identification Method for Early Faults of Momentum Wheel

Abstract

The present invention analyzes the dynamic response of the momentum wheel at different running times in the time domain and frequency domain, analyzes its frequency spectrum characteristics and changing rules, and combines the analysis of the dynamic characteristics of the momentum wheel parts and the calculation and analysis of the pulsation frequency of the bearing parts to analyze the generation and timing of the spectrum peaks. The cause of the spectrum peak change can be identified more scientifically and accurately for the early failure of the momentum wheel, especially the timely diagnosis of the cause of the failure. On the one hand, effective remedial measures can be taken in time to avoid unnecessary scrapping of the momentum wheel. On the one hand, it is possible to carry out research on failure mode analysis of momentum wheels, accurately locate the failure points of momentum wheels, provide more scientific, accurate and effective improvement measures, and improve the reliability of subsequent products.

Description

technical field [0001] The invention mainly relates to a detection method for diagnosing the cause of an early failure of a momentum wheel. Background technique [0002] At present, the momentum wheel is widely used in various satellites, spaceships and other spacecraft, using its? Gyro alignment? The reaction torque generated by the speed and speed changes is used 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 function of the satellite, and even cause the entire satellite to fail. Star scrapped. Moreover, since the delivery of the momentum wheel products to the final assembly of the satellite requires six months to one year of various ground environmental test assessments, the cycle is long and the test cost is huge. Once the momentum wheel fails, not only all the tests m...

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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