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final_exama - Final examination 16.30 Control Systems S.H.O...

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Final examination 16.30 Control Systems S.H.O. Eric Feron 100 points total 1.[8pt] Increased track densities for computer disk drives require careful design of the head positioning control. The transfer function of the system is 2 ) 1 ( ) ( + = s K s G Plot the Nyquist plot for this system when K =4. Compute the phase and magnitude at 0.5, 1, 2, 4 radians/sec. 2. [10pt] A feedback control system has a loop transfer function 10 11 50 ) ( ) ( 2 + + = s s s H s G . a/ Determine the corner frequencies (beak points) for the Bode Plot. b/ What is the slope of the Bode plot at very low and very high frequencies? c/ Sketch the Bode plot of the system (magnitude and phase). 3. [10pt] The experimental Oblique Wing Aircraft has a wing that pivots about an axis parallel to the yaw axis (horizontal pivoting). The wing is in normal, unskewed position for low speeds and can move to a skewed position for improved supersonic flight. The loop gain for the longitudinal control system is + + + + = 1 20 8 ) 1 2 ( ) 1 5 . 0 ( 4 ) ( 2 s s s s
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