Automatic Control Systems

If any term in the first column of a Routh array becomes zero, then_____.

  • A. Routh criterion cannot be used to determine stability
  • B. Routh criterion can be used by substituting a small positive number for zero and completing the array
  • C. Routh criterion can be used by substituting a big positive number for zero and completing the array
  • D. Routh criterion can be used by substituting a small negative number for zero and complet-ing the array
Answer: Option B.
Explanation: 

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