engineering recuitment HAL Management & Design Trainee Mock Test 2023 Control Systems Stability Analysis Routh-Hurwitz Stability Criteria
A system with characteristic equation s4 + 2 s3 + 11 s2 + 18 s + 18 = 0 will have closed loop poles such that
1
All poles lie in the left half of the s plane and no pole lies on imaginary axis
2
All poles lie in the right half of the s-plane
3
Two poles lie symmetrically on the imaginary axis of the s-plane.
4
All four poles lie on the imaginary axis of the s-plane.