to design an VI such that we can vary % of harmonics injecting to the fundamental wave 1) fundamental, pure sine wave= 50hz 2) harmonics injected= 100 hz ( ie, 1st harmonic) ( harmonics is the integral multiple of fundamental wave) then we add both pure and harmonic , to get combination = distortion ( shown in gragh as combination) then we pass through filter, and reproduce pure sine wave. now here,, next step is to find out how much % of harmonic has to be injected to get the distortion, ie.., 1% of 100hz= does not make any change 10% 100hz = some changes 30% of 100hz = some more changes in distortion 40% of 100 hz = more changes here now to design to specify these % of harmonic injection????????like supose we want to send only 10 % of 100hz harmonic frequency,

LabVIEW

HARMONICS Measurement

Rashmi,

Have you seen the IIR Filter documentation from the LabVIEW help? It explains some theory behind our IIR filter VIs. As for the internal logic behind the function, the VI just uses a Call Library Function on one of our LabVIEW analysis DLLs to call into the specific function corresponding to the filter you have selected.

Regards,

Joe S.