The open loop transfer function of a unity feedback control

Home » Control System » Control system miscellaneous » Question

The open loop transfer function of a unity feedback control system is given by
G(s) = K(s + 2)
s(s² + 2s + 2)

The centroid and angles of root locus asymptotes are respectively

1. zero and + 90° , – 90°
2. - 2 and + 60° , -60°
  3
3. zero and + 120° , – 120°
4. - 2 and - 90° , + 90°
  3

Correct Option: A

NA