Measurement or Math Channel VRMS (LVDT / Resolver Demod)

[mkj]

Is there way to create a math channel or measurement for LVDT demodulation?

The equation is based on the RMS voltage ratio:

VRATIO = (VA_RMS - VB_RMS) / (VA_RMS + VB_RMS)

I see you can create "measurements" with RMS, but can I use that in an equation somewhere for the ratio?  Either as a "readout" or in the scope on a math channel?

Similar question for resolver but that would get into whether the Va and Vb are in phase or not with the excitation.

(Waveforms 3.18 AD3450 and AD Legacy)

Edited October 5, 2022 by mkj

[attila]

Hi @mkj

See:

[mkj]

perfect - thank you

 

how do you write the "phase" calculation equation?  

Edited October 7, 2022 by mkj

[attila]

Hi @mkj

Measurements/Add/CustomGlobal the default example is Phase