Electrical Engineering · Control Systems
Consider the log magnitude versus ω plot and phase angle versus ω plot. The phase margin (PM) is defined as:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1PM = 180° − ∠ G(jω)H(jω) at ω = ωgc, where ωgc is the gain crossover frequency
- 2PM = 180° + ∠ G(jω)H(jω) at ω = ωpc, where ωpc is the phase crossover frequency
- 3PM = ∠ G(jω)H(jω) at ω = ωgc, where ωgc is the gain crossover frequency
- 4PM = 180° + ∠ G(jω)H(jω) at ω = ωgc, where ωgc is the gain crossover frequency✓
Correct answer
PM = 180° + ∠ G(jω)H(jω) at ω = ωgc, where ωgc is the gain crossover frequency
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