torsional vibration

[molossi74]

I'm working about torsional vibration , I use a pic-upin front of flywheel :
what is the relation between : angolar resolution , number of teeth , sample rate ...
thanks in advance

 

[GregLocock]

See the FAQ for this forum. I particularly recommend the Agilent pdf, and a B&K book called Frequency Analysis.



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[SomptingGuy]

It depends on your equipment and post-processing. We use inductive probes that give an approximate sine wave for a constant wheel speed. Demodulating that signal (using hilbert transforms and filters in Matlab) can allow a resolution comparable to the sample rate - much higher than the tooth-passing frequency.