- #1
hurliehoo
- 23
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Hi everyone, I would please like some suggestions regarding where my error is, designing a lead compensator with the root locus method for a unity feedback control system where G = [12.5] / [2.5 1 2500]. I want to set the overshoot zeta = 0.5 for an overshoot of 16%, and settling time Ts = 0.06s.
Using these parameters I get a desired pole at -66.665 + j115.467.
I think I understand the application of the root-locus method, ie summing the angles of the poles and zeros with the new pole etc, and I've tried it with a couple of different values for compensator poles and zeros using these parameters (eg a = 66.665, b = 290.65). I always get the correct Ts, but an overshoot of 46% instead of 16%.
Using these parameters I get a desired pole at -66.665 + j115.467.
I think I understand the application of the root-locus method, ie summing the angles of the poles and zeros with the new pole etc, and I've tried it with a couple of different values for compensator poles and zeros using these parameters (eg a = 66.665, b = 290.65). I always get the correct Ts, but an overshoot of 46% instead of 16%.
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