This is why you do the shake tests.
Two thoughts come to mind here...
building for 25 G vibration and 1000 G shock is pretty much consumer grade stuff and is easily achieved with off the shelf components.
The hard part comes in when you realize that riding on a solid rocket motor is brutal, and results in resonances that sweep through a wide range of frequencies during the burn. The vibration tables generally emulate this really well and weaknesses can be exposed in short order. If the circuit boards exhibit a resonance , components can literally be popped right off of the board... and sometimes weaknesses internal to the die bonding in some components can turn up as well.
If I had to rely on conformal coating to stake the parts for 22G, I'd be worried about the payload....
Glen AA8C
On 10/16/2014 01:01 PM, Harvey N. Vordenbaum wrote:
No conformal coating? hv
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Robert Bruninga Sent: Wednesday, October 15, 2014 7:18 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Cubesat Vibration Test
To see the violence that a cubesat has to go through, here is a test we did today on a power supply board.
http://aprs.org/psat/Vibe-coil-test1724.MOV (1 meg file)
It failed even before we got to the 22G requirement!
Yes, it is rocket science… a nasty place to ride…
Bob, WB4aPR _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb