Ringdown
by M. A. Hopcroft
18 Jun 2010
(Updated 19 Nov 2011)
Ringdown.m determines the resonator frequency and Q from a ringdown measurement.
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| File Information |
| Description |
A "ringdown" experiment records the amplitude of a resonator as it decays under the influence of the damping in the system, without any external input. Ringdown.m analyzes a data set from a resonator ringdown measurement and determines the resonator frequency and Q using different methods. An FFT is used to estimate the resonance frequency, and an exponential fit to the signal envelope is used to determine the Q. Finally, a minimum-search fit to the data set is performed to provide a second estimate of both values. |
| MATLAB release |
MATLAB 7.8 (R2009a)
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| Updates |
| 18 Jun 2010 |
included example data file |
| 19 Nov 2011 |
v2.1: Several important bugfixes and improvements. |
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