How to validate the vibration results of BFA001V1B?
Hi,
I connected the BFA01V1B and running condition monitoring code. My settings are
Accelerometer parameters are:
HpfCut =3 Acc_Odr=6660 FifoOdr=6660 Acc_Fs =16
MotionSP parameters:
size=2048 tau=50 wind=1 tdtype=0 tacq=5000
MotionSP Vibration Initialization
MotionSP Parameters are:
FFT size: 2048
FFT ovl : 75%
Tacq : 5000 ms
Update Accelerometer Settings:
Ok Enable HP Filter
Ok FullScale Setting
Ok Set Output Data Rate
Ok measure and calculate ODR
ODR = 6582.00 Hz
OK Set Accelerometer Parameters
Ok Bypass FIFO
The Results are:
*************************************************************
*** Time domain speed (RMS) as last value ***
Speed RMS on X axis was 1.757 mm/s
Speed RMS on Y axis was 4.566 mm/s
Speed RMS on Z axis was 1.914 mm/s
*** Time domain peaks ***
Max peak on X axis was 9.801 m/s2
Max peak on Y axis was 17.204 m/s2
Max peak on Z axis was 12.270 m/s2
*** Frequency domain results ***
FFT average for all axes has been performed on 93 items
FFT max amplitude on X axis was 1.827 m/s2 @ 298.89 Hz
FFT max amplitude on Y axis was 4.561 m/s2 @ 298.89 Hz
FFT max amplitude on Z axis was 3.181 m/s2 @ 298.89 Hz
My questions are:
How to calculate RPM. If I consider 299Hz then my RPM = 17940. I dont think my motor is running with this speed.
What I am missing in calculation of RPM.
Normally which axes to be considered to calculate the frequency?
I see pretty consistent signal. I have attached few plots. Is it ok to get this level of consistency.
What are the normal practice to do vibration analysis?
Thanks,
kumar