An Approach to Reduce the Vibration Amplitudes of a Printed Circuit Board in a Random Vibration Environment

Sakri M. I.; Mohanram P. V.
July 2009
CURIE Journal;2009, Vol. 2 Issue 2, p19
Academic Journal
The electronic equipment are often subjected to random vibration environment during their service life. The critical electronic packages mounted on printed circuit board (PCB) experience high acceleration and displacement levels at resonant frequencies and lead to early failure of electronic equipment. It is therefore essential to minimize the displacement levels experienced by the electronic assemblies due to random vibrations and improve their service life. This paper discusses the technique used to reduce the displacement levels of the PCB in a random vibration environment. Random vibration tests are conducted by mounting the PCB on nylon spacers and the results are compared with the similar test results obtained by mounting the PCB on rubber spacers. Based on the test results it was found that the rubber spacers reduced the acceleration levels by 66 percent and displacement by 63 percent.


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