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A unity gain negative feedback system has an open-loop transfer function given by 4. s) = s(1 + 10s)(1 + 10s)? Draw a Bode diagram for this system and determine the loop gain K required for a phase margin of 20 deg. What is the gain margin? 5. We are given the closed-loop transfer function 10(s + 1) T(s) = 82+98+10 for a unity feedback system and asked to find the open-loop transfer function, generate a log-magnitude-phase plot for both transfer functions, and determine whether the open- and closed-loop systems are stable.
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