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Looking for some help; the solution to the problem with explanations for each step will be appreciatedQuestion 2: a) Construct the root-locus for the K> 0 for the transfer function GH s(s1 (s2+ 7s + 12) S(S b) If the design value for the gain is K = 6, calculate the gain margin. c) Determine the value of the gain factor K for which the system with the above open loop transfer function has closed loop poles with a damping ratio ?=0.5

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Ans: Paut (a) vEn s (s+) (s+7s12) s (St) (St3) (st4) StepCi) CTotal No. of open loop poles (n) - 4 Step Cii) No of branchej net k step (vi) Angle of Asy꺄tots SỐ - 180 (29M) m-m 18o (2+1 135> A2 31S A 2 step Centrofdl o-3-4 圢. 2 4Sicp (viij intevsection wrth imj axía 1 2 rStabi Ii ty 210-8 5 K< 26 2s A(): 17. s s+ 26-25 - o 1.22」 -0-418 (BA Point) 1-22Patl (b) m(ju), H(jm) 12- to* 2-o to 12-сой 3 12-tog. (ОЗ To Calculate Phate cross ovet fx, =-180 Co Coo - I.5 - 1-93he gain 6 2 S 2 O O. 08 3 = 12-01 d 3 Pott (c) 60-18046。 -120-90 32. 3 .41 U so at

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