How to find the phase shift and amplitude ratio

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Discussion Overview

The discussion revolves around determining the amplitude ratio and phase shift from a specific graph, with participants seeking clarification on how to extract these values from the data presented.

Discussion Character

  • Homework-related, Exploratory

Main Points Raised

  • One participant requests guidance on how to find the amplitude ratio and phase shift from a particular graph, indicating a lack of understanding of the process.
  • Another participant references external resources on phase and amplitude, suggesting that the concept of amplitude ratio may vary depending on context and requires further explanation.
  • A participant expresses frustration at not being able to apply the information from the resources to their specific graph, indicating that their graph is complex but not the most complicated they have encountered.
  • One suggestion made is to take the Fourier transforms of the input and output to compute the cross-spectrum as a potential method for analysis.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on how to approach the problem, with multiple viewpoints and suggestions presented without resolution.

Contextual Notes

There is a lack of clarity regarding the specific characteristics of the graph in question, and the discussion does not resolve the assumptions or definitions needed to apply the suggested methods.

vtaela
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i am looking for the amplitude ratio and phase shift of this graph? could someone explain me how to obtain these results from this type of graph?
0.40Hz.gif


thank you
 
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See the first diagram here regarding phase:

http://en.wikipedia.org/wiki/Phase_(waves )


There is no universal 'amplitide ratio'...you have to explain what you seek...
Some alternatives are here:

http://en.wikipedia.org/wiki/Wave_amplitude
 
Last edited by a moderator:
i have already seen these but still i have no clue for the specific graph. i have more complicated graphs but not as complicate as this one.. i can't the results for this one..

if anyone has further instruction please post here. thank you
 
Take the Fourier transforms of the input and output and compute the cross-spectrum?
 

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