Vibrational Modes: How They Affect Motion

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The discussion centers on the interpretation of vibrational modes in relation to accelerometer data from a Bimorph beam (PEH). The "Predicted" graph is believed to be generated using Finite Element Analysis (FEA) tools, while the "Measured" graph reflects actual data collected from experiments. The setup likely involved exciting the MEMS arm with a high mechanical impedance source and varying the frequency to obtain the results. This approach is analogous to plotting the transfer function of a two-port network. Understanding these graphs is crucial for analyzing the vibrational behavior of the system.
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I understand the basic meaning of vibrational mode. Could someone interpret what this graph means?
1637767754603.png

Ps: It is not a homework hence why I did not leave it under that headline.
 

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What is the test setup? Is this accelerometer data?
 
This data is on Bimorph beam (PEH)...
 
Kajan thana said:
This data is on Bimorph beam (PEH)...
Oh, like this: https://www.google.com/url?sa=t&rct.../8/4/645/pdf&usg=AOvVaw2DBGVt6_5h1-fJ0Yv-EqoI

Kajan thana said:
Summary:: I understand the basic meaning of vibrational mode. Could someone interpret what this graph means?
So the "Predicted" graph was likely plotted using FEA tools, and the "Measured" graph was plotted directly from the acquired data. Presumably they were exciting the MEMS arm with a high mechanical impedance source and sweeping the frequency of that source to get the plot. Similar to how you plot the transfer function of a 2-port network...
 
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