Bode & Nyquist diagrams from expirmental results

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    Bode Diagrams
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Discussion Overview

The discussion revolves around the process of drawing Bode and Nyquist diagrams from experimental results, specifically focusing on phase delay and voltage gain data. Participants are seeking assistance in creating these diagrams without the use of MATLAB.

Discussion Character

  • Technical explanation, Homework-related, Exploratory

Main Points Raised

  • One participant requests help in drawing Bode and Nyquist diagrams from experimental data, specifically mentioning phase delay and voltage gain.
  • Another participant suggests using MATLAB for the task.
  • A different participant expresses a desire to complete the task without MATLAB.
  • Instructions are provided for creating a Bode plot using log-log paper, including labeling axes and plotting data points.
  • A question is raised regarding whether the system includes feedback for the Nyquist plot.
  • A participant clarifies that their system does not have feedback.
  • A request is made for the transfer function associated with the system.
  • The transfer function provided is: 1 / (0.0022s + 1).

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the method of drawing the diagrams, as there are differing preferences for using MATLAB versus manual methods. The discussion remains unresolved regarding the best approach to take.

Contextual Notes

Participants have not specified certain assumptions or details about the experimental data, such as the frequency range for the Bode plot or the context of the transfer function.

gimini75
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Hi

I have a task to draw a bode and nyquist diagrams from an expirmential results, I have the phase delay and the votage gain data, can you help me to darw bode and nyquist diagrams?


Thanks
 
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gimini75 said:
Hi

I have a task to draw a bode and nyquist diagrams from an expirmential results, I have the phase delay and the votage gain data, can you help me to darw bode and nyquist diagrams?


Thanks

Just use matlab.
 
Thanks for your reply, but I want to draw it without using MATLAB.
 
gimini75 said:
Hi

I have a task to draw a bode and nyquist diagrams from an expirmential results, I have the phase delay and the votage gain data, can you help me to darw bode and nyquist diagrams?


Thanks

For the Bode plot, start with log-log paper, label the horizontal frequency axis with the appropriate frequency range, and label the vertical axis with both gain and phase shift markers. Theh just plot the data points that you have and connect the dots in a smooth fashion.

For the Nyquist plot, it's a little more involved -- does your system include feedback, or is it open-loop?

http://en.wikipedia.org/wiki/Nyquist_plot

.
 
Thanks for your reply, the system which I want to draw a Nyquist does not have a feedback.
 
Can you give us the transfer function?
 
Thanks for your reply, the transfer function is:
1 / (0.0022s + 1)
 

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