In a feedback control system, phase margin(PM) is1. Directly proportional to G2. Inversely proportional to G3. Independent of G4. Zero when G =0Which of the above statements are correct?

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Frequency Response Analysis topics include: Frequency response, polar and bode plots, pass and minimum phase systems, correlation between time and frequency response and transfer functions. Frequency response analysis (FRA) is a tool that measures the output spectrum of a system relative to a stimulus. It's also known as Transfer Function Analysis.  FRA calculates the response of a structure to steady state oscillatory excitation. The loading is sinusoidal, and the response occurs at the same frequency. The loads can be forces, displacements, velocity, and acceleration.  FRA is used in... Show more

In a feedback control system, phase margin(PM) is<br />1. Directly proportional to G<br />2. Inversely proportional to G<br />3. Independent of G<br />4. Zero when G =0<br />Which of the above statements are correct?