Vibration Testing

[jonesdtw]

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.

 

[Heckler]

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.....

 

[jonesdtw]

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

 

[SomeYahoo]

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.

 

[IRstuff]

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

 

[Heckler]

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.