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Unformatted text preview: G(s). (Magnitude and angle plots) c) Verify sketch results by submitting a MATLAB produced Bode plot. d) Use MATLAB to determine phase margin PM and crossover frequency ω c and compare results to what you obtained in part a. SEE NEXT PAGE!!! 4. Assume G(s) =KL(s) , shown below, is the openloop gain in a unity feedback system. Make hand sketches showing the Nyquist plots for: ) 68 4 ( ) ( ) ( 2 s s s K s KL s G K = 200, 272, and 300. (Note that this is the same transfer function you did the root locus and Bode plot for in the last homework exercise.) Show critical points (crossover values on the real axis) for all three cases. Determine closed loop system stability for each case. Verify your sketches by submitting MATLAB generated Nyquist plots....
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 Fall '08
 Friedrich
 Frequency, Electronics terms, Nyquist plot, phase margin PM

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