K_seeker
2008-06-23 23:40:09 UTC
Hi
I am trying to understand how to extract the phase information from the Phase Spectrum generated by the Amplitude and Phase Spectrum.vi. The attached VI is using the above function. In the example VI we are adding three signals. Two of them are of same frequency (400 Hz) but with a some phase difference. The third signal is 60 Hz. The main goal here is not only to calculate the power of 400 Hz signal but distinguish if more than one 400 Hz signal is present with some phase shift. Also we need to get an idea what's the phase difference is.
I am working with a resolver based system to determine the position information. We are getting a very small error and we suspect that some 400 Hz of capacitive or inductive coupling with a phase shift is causing this problem. If you have any idea how to detect this please post it here.
Thanks.
SIGNAL ANALYSIS.vi:
http://forums.ni.com/attachments/ni/250/41045/1/SIGNAL ANALYSIS.vi
I am trying to understand how to extract the phase information from the Phase Spectrum generated by the Amplitude and Phase Spectrum.vi. The attached VI is using the above function. In the example VI we are adding three signals. Two of them are of same frequency (400 Hz) but with a some phase difference. The third signal is 60 Hz. The main goal here is not only to calculate the power of 400 Hz signal but distinguish if more than one 400 Hz signal is present with some phase shift. Also we need to get an idea what's the phase difference is.
I am working with a resolver based system to determine the position information. We are getting a very small error and we suspect that some 400 Hz of capacitive or inductive coupling with a phase shift is causing this problem. If you have any idea how to detect this please post it here.
Thanks.
SIGNAL ANALYSIS.vi:
http://forums.ni.com/attachments/ni/250/41045/1/SIGNAL ANALYSIS.vi