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random vibration signal (generation)

thread31-383980

random vibration signal (generation)

random vibration signal (generation)

(OP)
we got a voice coil type vibration shaker. we use a signal generator and a power amplifier to drive the shaker. we can do some primitive sinusoidal vibration test (with an accelerometer, a oscilloscope). any stone age device we can use to conduct some random vibration, even just with a flat line on PSD ? thanks.
PS. most vib requirement, 5 to 2,000 Hz. RTCA/DO160, MIL-STD-810....

RE: random vibration signal (generation)

(OP)
a random vibration signal generator.
thanks.

RE: random vibration signal (generation)

If you want cheap, you could possibly use a computer sound card output and run that into your amplifier, or any sort of arbitrary waveform generator like: http://www.ebay.com/itm/5MHz-Arbitrary-Waveform-Du... But the latter is just a higher frequency version of a sound card; it's just the latter will probably look less hobby-shop to a customer.

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RE: random vibration signal (generation)

(OP)
someone can write me couple lines in VB to have such random signal (5 to 2,000 Hz) to sound card ?
most cheap waveform generators do not limit to 2,000 Hz, i do not know how to insert a low pass filter.
thanks.

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