Vibrations treatment with order tracking express VI

[gnou]

Hello,

I need to compute data from 2 accelerometers during a ramp of speed (30k rev/min to 65k rev/min) with an electrical motor. I save my data in a TDMS with a 25.6kHz rate including the machine speed which come from the CAN bus and synchronized with accelerometers in the FPGA layer.

I wanted to use Order Tracking Express VI from the sound and vibration toolkit. I wanted to use directly my speed data (waveform from the tdms) but I obtained a 21421 error (OA Speed Profile attribute not found).

Is it possible to use this function without speed values from a tachymeter ? If no, how can I extract the fisrt order amplititude of each speed step ?

[Guillaume.D]

Hello,

Have you modified this parameter to integrate the speed profile ?

Best Regards,

[gnou · Accepted solution]

Yes, I tried it but it's only to see other kind of graphs. I replaced in the express VI, the function "Convert Speed Waveform to XY Graph" by "Convert Speed Waveform to Speed Profile". 

I can execute the express VI and obtain some results but I'm not sure if it's correct.