A micro-vibration isolator accelerated life test method and system

An accelerated life test, micro-vibration isolator technology, applied in vibration testing, testing of machine/structural components, instruments, etc., can solve problems such as low oxidation effect

Active Publication Date: 2019-08-09
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

However, long-term operation in orbital vacuum environment has basically no effect of oxidation (atomic oxygen still exists, but the concentration is negligible, so the effect of oxidation is also very small and can be ignored)

Method used

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  • A micro-vibration isolator accelerated life test method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0155] Taking the control moment gyro vibration isolator of a certain satellite as an example to illustrate the specific implementation of the life test.

[0156] (1) Collect the necessary parameters:

[0157] The maximum operating temperature of the vibration isolator is 90°C

[0158] The accelerated time range of the accelerated fatigue test is less than 48h

[0159] Accelerated aging test accelerated time range is less than 45 days

[0160] (2) Determine the conditions for carrying out the accelerated fatigue test:

[0161] The service life of this type of vibration isolator is required to be 8 to 12 years. When working in a space environment, it is subjected to periodic stress with a frequency of 60Hz, 100Hz, 200Hz, 300Hz, etc., and an amplitude of about 0.1mm-0.4mm for a long time.

[0162] Determine the displacement amplitude X that the vibration isolator can bear in normal operation 1 =0.4mm, frequency f 1 = 300Hz and normal working life t 1 =70080h;

[0163] tak...

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Abstract

The invention provides a micro-vibration vibration isolator accelerated life test method and system. A vibration isolator is mainly characterized by using silicone rubber as a main bearing unit. Thiskind of vibration isolator accelerated life test method is not available in the prior art. The method is characterized by determining that accelerated life test comprises accelerated fatigue test andaccelerated aging test according to major factors influencing the service life of a vibration isolator; in the accelerated life test process, determining conditions of the accelerated fatigue test andthe accelerated aging test respectively according to relevant formulas; and carrying out function and performance test on the vibration isolator before and after relevant test and in the test to judge whether the vibration isolator can meet working requirements and determine that the vibration isolator can meet low-long life service requirements. The method fills the blank of this kind of devicelife test method, can ensure that in-orbit normal working life of the type of device can be known through the accelerated life test, and can effectively reduce life test time, improve ground life testefficiency and reduce ground life test cost.

Description

technical field [0001] The invention relates to an accelerated life test method and system for on-orbit micro-vibration isolators, especially suitable for micro-vibration isolators using silicon rubber, and belongs to the field of accelerated life tests of aerospace products. Background technique [0002] With the improvement of performance indicators such as the resolution of remote sensing satellites, the influence of micro-vibration on imaging quality has gradually become a key issue restricting the performance improvement of remote sensing satellites. Through ground tests and simulation analysis of a certain type of satellite, it is found that the control moment gyroscope (CMG) on the satellite produces a large micro-vibration, the maximum disturbance force reaches 40N, and the camera boresight shake reaches 0.1 arc seconds, which is higher than the 0.0665 angle proposed by the camera. The second index affects the imaging quality of the camera, so it is necessary to desi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00G01M7/02
CPCG01M7/02G01M13/00
Inventor 庞世伟潘腾宫颖李丹杨松张强郭倩蕊张媚毛一岚
Owner BEIJING INST OF SPACECRAFT SYST ENG
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