Question

Consider the following frequency domain specifications required to design a control system: 
A. Bandwidth 
B. Gain margin 
C. Phase margin 
D. Maximum overshoot 
Choose the correct answer:

• A. A, B and C only
• B. B and D only
• C. A and D only
• D. C and D only

Hint:

Bandwidth, Gain margin, Phase margin → Frequency domain. Overshoot → Time domain.

Answer 1

The Correct Option is A

Concept: Control system specifications are categorized into:
• Frequency domain specifications
• Time domain specifications

Step 1: Frequency domain parameters
• Bandwidth: Range of frequencies system can handle
• Gain Margin: Stability margin in gain
• Phase Margin: Stability margin in phase These are all obtained from Bode plots.

Step 2: Time domain parameter
• Maximum Overshoot: Depends on transient response → time domain

Step 3: Conclusion Frequency domain specs = A, B, C only \[ \therefore \text{Correct answer is (A)} \]