A Comprehensive Judgment Method for Shafting Faults of Space Moving Parts

Abstract

A comprehensive evaluation method for shafting faults of space moving parts, which comprehensively evaluates the state of the shafting of space moving parts by using three methods of current, friction torque, and micro-vibration, and realizes shafting fault location without dismantling the shafting. In particular, through the analysis of the fault characteristic frequency of the bearing parts and the shafting natural frequency shift, the cause of the spectrum change can be grasped, so as to realize the diagnosis and location of the shafting fault of the space moving parts. On the one hand, the faulty shafting can be identified in time, and effective remedial measures can be taken to avoid unnecessary scrapping of the shafting. On the other hand, the fault can be accurately located, and more scientific, accurate and effective improvement measures can be provided to improve the reliability of the shafting.

Description

technical field [0001] The invention relates to a comprehensive evaluation method for shaft system faults of space movable parts, and belongs to the technical field of fault diagnosis. Background technique [0002] Space moving parts represented by flywheels and control moment gyroscopes are widely used in various spacecraft to stabilize or adjust the attitude of the spacecraft. As one of the core components of space moving parts, the shaft system provides a stable slewing bearing, which has the characteristics of high rotation accuracy, high precision level, high stability and long life. Once the shaft system fails, it will seriously affect the main functions of space moving parts, and even cause the spacecraft to be scrapped. In addition, since the space active components need to undergo a series of mechanical tests and space environment test assessments before delivery to the final assembly, once the shafting fails, not only the tests need to be redone, but also the deli...

AI Technical Summary

Problems solved by technology

[0005] (2) The response of the current to certain faults in the shaft system is slow and the sensitivity is low. Especially for local damage such as peeling, indentation or cracks on the working surface, it is difficult to monitor in the early stage. Only when the fault accumulates to a certain extent can the current pass reflect

If the shaft system with such early failures is installed into the space active components, or even delivered to the final assembly for final launch, if a failure occurs after orbital operation, it will seriously affect the main functions of the space active components, and even cause the spacecraft to be scrapped. The consequences are immeasurable

Images