Question: A Bode diagram for a process, valve, and sensor is shown in figure.(a) Determine an approximate transfer function for this system.(b) Suppose that a proportional

A Bode diagram for a process, valve, and sensor is shown in figure.(a) Determine an approximate transfer function for this system.(b) Suppose that a proportional controller is used and that a value of Kc is selected so as to provide a gain margin of 1.7. What is the phasemargin? 10 AROL 0.1 0.01 0.001 0.01 0.1 10 50 w (rad/min) -90

10 AROL 0.1 0.01 0.001 0.01 0.1 10 50 w (rad/min) -90 (deg) d 10 -180 u 0.01 0.1 50 w (rad/min)

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