I have a sinusoidal input signal with a known amplitude and frequency. My objective is to calculate the rotary displacement and velocity (RPM). This is usually done with a first order time lag for which the differential equation is well known. In this case, my calculated rotary velocity (RPM) and LMS AMESim results did not tally whereas the frequency response (natural frequency) of my calculation and LMS AMESim agree well. I am not sure which one is right.
While posting the question, i made the silly mistake of using pi/180*60 to convert deg/sec to rpm/min which should have been 60/360. With this correction, both the results are matching now. Thanks to Mr. Kannan from Siemens for pointing out the mistake.
The reference for the mathematical model can be found in this link. http://www.mathpages.com/home/kmath179/kmath179.htm
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