Question:
Routh test cannot be used to test the stability of a control system containing:
Routh test cannot be used to test the stability of a control system containing:
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For systems with time delays, use Nyquist or root locus methods for stability analysis.
Updated On: Jan 17, 2026
- Controller
- Transportation lag
- Final control element
- Controller and control element
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The Correct Option is B
Solution and Explanation
The Routh-Hurwitz stability criterion cannot handle systems with pure time delays (transportation lag) because these introduce non-rational terms into the characteristic equation.
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