Stability of a control system containing a transportation lag can be best analysed by_______________?
Correct answer: C. Frequency response methods
- A. Routh test
- B. Root locus methods
- C. Frequency response methods
- D. None of these
Explanation
Transportation lag produces an exponential delay term and is most conveniently assessed through its frequency response, where the delay appears as phase lag. The ordinary Routh test requires a polynomial characteristic equation.
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