railway DFCCIL Executive 2025 Mock Test Control Systems Stability Analysis Routh-Hurwitz Stability Criteria
First column elements of the Routh’s tabulation are 1, 3, 7, -30/7, 10. It means that there -
1
is one root in the left half of s-plane.
2
is one root in the right half of s-plane
3
one two roots on the jω axis.
4
are two roots in the left half of s-plane