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Vibration Testing

Vibration Testing

Vibration Testing

(OP)
Has anyone temporarily installed equipmnet in an aircraft for vibration testing. I need to test the vibration a piece of equipment is subjected to inside the radome comopartment. I am looking for a list of test equipment (ie. 2 single axis accelerometers, one tri-axis accelerometer , power supplies, signal conditioners, and data logger) for a temporary installation. Battery operated devices are the optimum solution, but I can tap into the aircraft power if necessary.

RE: Vibration Testing

In my opinion I'm not sure this is the correct way to test a piece of avionics equipment.  I would consider having a test plan (IAW MIL STD 810) and conducting a more controled vibration test in a lab.  Doing a field vibration test could lead to other problems down the line.  Just my two cents.....

RE: Vibration Testing

(OP)
I agree. However, this is a customer driven event. They want a flight test.

RE: Vibration Testing

Depending on how long you need to run you could use something like this:

http://www.ncode.com/page.asp?section=0001000100010001

with a deep-cycle car battery.  I believe this will even handle the excitation for your accels, etc. so the requirement for a power supply goes away.

But it all depends on how long the test will be.  Make sure the battery will last as I'm sure the landing is a large component of the test.

RE: Vibration Testing

Do you have anything that's rotation sensitive?  If so, you might want to add some gyros to the mix.

You could look at some of the people that do MIL-STD-810 tests for some information about the equipment they use, since most of that should be directly applicable for your application.

TTFN



RE: Vibration Testing

Standard Aircraft power is 28 VDC!  Unless, your bay of equipment is converted and conditioned AC.  I would be concerned with power conditioning while conducting this test with sensitive measuring devices.

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