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Unformatted text preview: degrees? What is the Gain Margin for a phase margin of 20 degrees? 3. An uncertain plant model is described by G true = G ( s )(1 + L ( s )) , with  L ( jω )  < l ( jω ) , 1 and G ( s ) = 100 s ( s/ 10 + 1) and l ( s ) = ± ± ± ± s + 10 300 ± ± ± ± . We are interested in controlling this system using proportional control only. (a) For what range of gains is the nominal, closed loop system stable? (the nominal system corresponds to L = 0. (b) For what range of gains is the true closed loop system guaranteed to be stable? Support your argument with appropriate Bode plots. (c) What maximum bandwidth do you think proportional control can reasonably achieve? 2...
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 Spring '04
 EricFeron
 Decibel, Electronics terms, Proportional control, Eric Feron

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