The open loop transfer function of a system is :G(s) H(s) =K/ (1+s) (1+2s) (1+3s)The phase crossover frequency wpc is:

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

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 many applications, including:
Noise, vibration, and harshness (NVH) analysis of vehicles
Rotating machinery
Transmissions
Powertrain systems
Electrochemical impedance spectroscopy (EIS)
Materials analysis
Aerospace control 

FRA can also be used to check the mechanical and electrical integrity of power transformers. It can be used for acceptance tests, commissioning, relocation, post fault, and manufacturing testing.

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