Question

Consider the following statement regarding Routh Hurwitz criterion:

(a) It gives absolute stability

(b) It gives gain and phase margin

(c) It gives the number of roots lying in RHS of the s-plane

(d) It gives gain, phase margin and number of roots lying in RHS of the s-plane

I have been asked this question in an online interview.

I need to ask this question from Routh-Hurwitz Stability Criterion topic in chapter Stability and Algebraic Criteria of Control Systems

Answer 1

Right choice is (d) It gives gain, phase margin and number of roots lying in RHS of the s-plane

To explain: Routh Hurwitz gives the absolute stability and roots on the right of the s plane.