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|13th February 2012, 09:04 PM||#1|
Join Date: May 2003
Location: Belgium, Limburg
How should the AC Analysis of a DC servo look like
There are a lot of threads where there is spoken of DC-servo's, but unfortunately non of them (not the ones I found) are mentioning how the AC analysis should look like. So,
Bob Cordell is showing in his book how a poorly designed DC servo looks like (Page 166). I'm asking myself than how the AC analysis of a good DC servo should look like.
1 Enough gain at low frequency (below 1Hz)
2 Gain dropping fast at higher freq (above 1Hz)
3 As close as possible to 90°(integrator) of phase shift at the point where the gain is 0.
4 High impedance at output and input
What are your remarks to the AC analysis below? Is this any good?
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