Mounting accelerometers on DUTs during vibration durability tests?
Mounting accelerometers on DUTs during vibration durability tests?
(OP)
Is anyone familiar with the practice of mounting accelerometers on DUTs during vibration durability tests?
I've been hearing conflicting (and rather passionate) views on if this is acceptable from a few different people. I'd like to find discussion of this subject haven't found one so far.
Thanks,
David
I've been hearing conflicting (and rather passionate) views on if this is acceptable from a few different people. I'd like to find discussion of this subject haven't found one so far.
Thanks,
David





RE: Mounting accelerometers on DUTs during vibration durability tests?
http://www
Jim Kinney
Kennedy Space Center, FL
RE: Mounting accelerometers on DUTs during vibration durability tests?
Interesting thread but I am interested in where to place the control accelerometer, not how to mount it.
I found this:
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I'm interested in a similar discussion related to sinusoidal durability testing.
David
RE: Mounting accelerometers on DUTs during vibration durability tests?
RE: Mounting accelerometers on DUTs during vibration durability tests?
I'm not sure I agree with Tustin's recommendation of never using averaging or Extremal. One will always get undertesting and overtesting at various locations around the DUT, but if you don't have an accel there you'll never know it.
Anyway, back to the original question of location. We always try to mount the control accelerometer(s) as close to the DUT interface as possible, on a rigid location on the fixture. Rarely do we mount it on the DUT and only sometimes mount it to the slip table.
I think it's not mounted to the DUT because most of the time the customer doesn't want to drill and tap their product and a lot of times their product surface isn't beefy enough anyway.
The bottom line is the control accel just needs to be in a location that needs to see the desired vibration spectrum. That location is the only one where you can guarantee that it's seeing the spectrum. So the farther away you are from the DUT, and the more interfaces there are between the control and the DUT, the worse it is.
By the way, I highly recommend taking Tustin's (TTI) classes. It was probably one of the best classes I've ever taken.
RE: Mounting accelerometers on DUTs during vibration durability tests?
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