Unformatted text preview: negative root loci.) 4. Turn in a MATLAB generated Bode plot for ) 68 4 ( ) ( 2 s s s K s KL where K is set to the positive value determined in problem 2. at which roots cross over into the right half plane, i.e., roots on the imaginary axis. Estimate from your Bode plot the frequency at which the magnitude of the response is 1.0 (0 dB) and the angle of the response is -180 o . 5. A certain system has a controller: 8 1 ) ( s s D c a) Assume the sampling rate T is 10% of the controller time constant. Find approximate expressions for D c [z] for a digital realization of the controller using: Tustin’s method Euler’s method b) Find a difference equation relating controller output to controller input for the D c [z] you found using Tustin’s method....
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- Fall '08
- Complex number, negative root loci