We have a model of an open-loop system and its root locus plot ,We add a single pole and/or a single zero to the system,每一种情况会造成什么影响

A closed-loop system has the characteristic function (𝑠2 – 4) (s + 1) + k (s - 1)=0 . Its root locus plot against K is -------Select one:

A unity feedback system has an open loop transfer function, G(s) =  k/s2The root locus plot isSelect one:a. Bb. Ac. Cd. D

The open loop transfer function of unity feedback, underdamped 0 system is given as: G(s) = K/(s(1 + Ts)) Find the values of K and T, if the Maximum Peak Overshoot of a closed loop step response is restricted to be below 110% (Mp = 0.1) of the steady state value and the settling time (within 2% band) should not exceed 0.2 seconds. Show how these constraints can be attained with the help of location of the complex-conjugate pole-pair on s-plane and shade the region of s- plane which satisfies the constraint.

Consider points s1 = -3 + j4 & s2 =  -3 - j2 in the s-plane for a system withG(s)H(s) = Select one:a. s1 is on root locus but not s2b. s2 is on root locus but not s1c. Neither s1 nor s2 is on root locusd. both s1 and s2 is on root locus

Given a unity feedback system that has open loop transfer function. Compute the gain value K that makes the closed-loop system have a double pole. Also compute the location of the double pole.