40. The open-loop transfer function of a unity feedback control system is G(s)H(s) = 225/(S( s+2)(s +T)) Where T is a variable parameter The closed-loop system will be stable for all values of
(a)T > 0 (b)0 < K < 00 (c)>11 (d)positive
Answer
Answer : (c)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Stability Theory » Exercise - 142. The open-loop transfer function of a control system is given by G(s) = (K(s+8))/(S( s+4)(s+a)) The smallest possible value of a for which the system is stable in the closed-loop for all positive value of K is : (a) 0 (b) 4 (c) 8 (d) 12
Stability Theory » Exercise - 130. The characteristic equation 1 + G(s)H(s) = 0 of a system is given by s4 + 8s3 +12s2 +8s + K = 0 For the system to remain stable, the value of gain K should be : (a) zero (b) 0< K (c) >11 (d) positives
Stability Theory » Exercise - 17. The transfer function of a control system is given as where k is the gain of the system in radians/amp. For this system to be critically damped, the value of k should be : (a) 1 (b) 2 (c) 3 (d) 4
Stability Theory » Exercise - 144. The open-loop transfer function of a unity negative feedback control system is given by G(s) = (K(s+4))/(S( s+2)(s+6)) For K >4, the stability characteristics of the open-loop and closedloop configurations of the system are, respectively (a) stable and stable (b) unstable and stable (c) stable and unstable (d) unstable and unstable
Stability Theory » Exercise - 15. The characteristic equation of a feedback control system is The number of roots in the right half of s-plane are : (a) zero (b) 1 (c) 2 (d) 3