Function

Describing Function for non-symmetric Saturation Model

Describing Function for non-symmetric Saturation Model
  1. What is describing function in control system?
  2. What is describing function analysis?
  3. What kind of approximation method is used in the describing function method?

What is describing function in control system?

Describing Function (DF) is a classical tool for analyzing the existence of limit cycles in nonlinear systems based in the frequency-domain approach. Although this method is not as general as the analysis for linear system is, it gives good approximated results for relay feedback systems.

What is describing function analysis?

Describing function analysis is a technique for studying the frequency response of nonlinear systems. It is an extension of linear frequency response analysis. In linear systems, transfer functions depend only on the frequency of the input signal.

What kind of approximation method is used in the describing function method?

It is based on quasi-linearization, which is the approximation of the non-linear system under investigation by a linear time-invariant (LTI) transfer function that depends on the amplitude of the input waveform.

Sampling How does the quadrature sampling lower the sampling rate?
How does the quadrature sampling lower the sampling rate?
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Fourier Proof that DFT is symmetric
Proof that DFT is symmetric
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Response Impulse response from the transfer function
Impulse response from the transfer function
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