Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
Correct answer: C. The system is highly oscillatory
- A. The system is relatively stable
- B. The system is highly stable
- C. The system is highly oscillatory
- D. None of the above
Explanation
A gain margin near unity, or a phase margin near zero, places the system close to the stability limit. Such a system has weak damping and is therefore highly oscillatory.
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