Design method for integrated stress, acceleration and service life testing profile of astronautic drive component

Abstract

The invention provides a design method for an integrated stress, acceleration and service life testing profile of an astronautic drive component, which can be applied in the field of improving the reliability of the astronautic drive component. Based on determination of the existing conventional service life testing profile, a thorough test is carried out at first to determine the extreme stress with no changes in the failure mechanism of the astronautic drive component, then the stress is divided into a plurality of stress levels to determine the one-time cycle time of the stress and design the integrated acceleration and stress testing profile, the stress needs to be increased if good effects of acceleration cannot be achieved by the testing profile, the profile of the added stress is prepared according to the cumulative damage theory and is superimposed with the existing testing profile to obtain the final integrated stress, acceleration and service life testing profile, and samples can be tested through the testing profile. While the failure mechanism of the astronautic drive component cannot be changed, the acceleration and service life of the astronautic drive component can be tested, and good effects of acceleration can be achieved.

Description

technical field [0001] The invention belongs to the field of reliability of aerospace drive components, and in particular relates to a design method for a comprehensive stress-accelerated life test section of an aerospace drive component. Background technique [0002] According to the statistical data of foreign satellites, the "stuck" caused by poor lubrication of the driving components is one of the main reasons for the failure of satellites, and the friction and wear of the driving components is the key reason for the decline in the performance of the rotating mechanism. Aerospace drive components are key products that restrict the long-life in-orbit flight of satellites, and their high reliability and long life are crucial to the development and use of new long-life satellites. [0003] Usually the life characteristics of products are obtained by doing life tests under normal conditions. However, for satellite drive components, if the conventional life test method is us...

AI Technical Summary

Problems solved by technology

The currently completed reliability assessment of simulated on-orbit environment work is limited to the environmental conditions required by the design, and has not been verified by pull-out and ground-breaking tests;

[0006] 2. The existing test verification level of the drive components basically supports the life requirements of the synchronous orbit for 8 years and 2,000 hours of cumulative work. For the performance requirements of longer on-orbit life and cumulative working hours, there is no direct test data verification and test method. Evaluate

In view of the closed policy adopted by foreign countries on my country's related technologies, we have no way of knowing how to design the accelerated life test profile of foreign aerospace drive components, and the research on accelerated life test of aerospace drive components in my country has just started. Applied Aerospace Drive Components Accelerated Life Test Profile Design Method

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