2. (10 points) A unit feedback control system has the following loop transfer function 4s +1 L(s) = s² (s+ 1)(2s + 1) Wi

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2 10 Points A Unit Feedback Control System Has The Following Loop Transfer Function 4s 1 L S S S 1 2s 1 Wi 1 (100.77 KiB) Viewed 31 times

2. (10 points) A unit feedback control system has the following loop transfer function 4s +1 L(s) = s² (s+ 1)(2s + 1) With the contour of s shown in Figure (a), the corresponding L(s) is shown in Figure (b). Use Nyquist criterion to determine Im jw joo Re J0+ R-∞0 b _00 @0' 10.4. @=0.355 - joo (a) (a) The number of closed-loop poles on the right half-plane. (b) Whether the system is stable or not. - 1 @=+∞o (b) Radius