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| Design of General Tool for Screening Test of Combined Products |
| Received:August 12, 2020 Revised:October 10, 2020 |
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| DOI：10.7643/issn.1672-9242.2022.03.010 |
| KeyWord:environmental stress-screening process random vibration general tool |
| Author | Institution |
| DONG Zhi-yuan |
Aerospace Science & Industry Corp Defense Technology R&T Center, Beijing |
| LI Fei-fei |
Aerospace Science & Industry Corp Defense Technology R&T Center, Beijing |
| LI Jian-wu |
Aerospace Science & Industry Corp Defense Technology R&T Center, Beijing |
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| Abstract: |
| This paper aims to improve the test efficiency of combined products in random vibration test of environmental stress screening, standardize the installation and test methods of products without tooling, reduce the physical consumption of test personnel, and ensure the safety and quality of the test. Through the design of general tooling, simulation analysis and test verification of the tool are carried out to ensure that vibration control curve tolerance meets the requirements of relevant standards. The test results show that the general tooling can meet the installation requirements of samples with size less than 600 mm× 500 mm× 800 mm and regular shape. The tolerance of PSD of the vibration control curve is not more than ± 3 dB, RMS is not more than ± 1.5 dB, and the overall uniformity of tooling is good. The deviation between RMS of a rigid connection between each sample and pressing plate and RMS of control curve is not more than ± 1.5 dB. The environmental stress screening test is carried out with general tooling, and the test method met the requirements of the GJB 1032—90 “Environmental Stress Screening Method for Electronic”. |
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