updated lab 3

rjk14002 · Sep 27, 2018 · db5a2c1 · db5a2c1
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diff --git a/ME3263-Lab_03.ipynb b/ME3263-Lab_03.ipynb
diff --git a/ME3263-Lab_03.pdf b/ME3263-Lab_03.pdf
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+# ME 3263 Introduction to Sensors and Data Analysis (Fall 2018)
+
+## Lab #3 Measuring Natural Frequencies
+
+
+### What are natural frequencies
+
+In free vibration (i.e., no external forcing), structural components
+oscillate at specified frequencies or combinations of frequencies. Since
+these vibrations are unforced, the associated frequencies are referred
+to as natural frequencies; it's how the system vibrates if left to
+behave on its own. In contrast, driven linear systems vibrate at the
+driving frequency. An amplification of the response (called resonance)
+occurs when the driving frequency coincides with one of the natural
+frequencies. In short, the system is driven at a frequency at which it
+likes to vibrate. Large amplitude oscillations are the result. So it is
+important to know what the natural frequencies are *a priori* so you can
+avoid driving the system into resonance.
diff --git a/cooley_and_tukey-FFT.pdf b/cooley_and_tukey-FFT.pdf
diff --git a/figure_01a.png b/figure_01a.png
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diff --git a/harris-1978.pdf b/harris-1978.pdf
diff --git a/jerri_1977-shannon_sampling.pdf b/jerri_1977-shannon_sampling.pdf
diff --git a/nyquist.pdf b/nyquist.pdf