This work introduces the concept of time-frequency map of the phase difference between the cantilever response signal and the driving signal, calculated with a wavelet cross-correlation technique. The wavelet cross-correlation quantifies the common power and the relative phase between the response of the cantilever and the exciting driver, yielding "instantaneous" information on the driver-response phase delay as a function of frequency. These concepts are introduced through the calculation of the response of a free cantilever subjected to continuous and impulsive excitation over a frequency band.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3323919 | PMC |
| http://dx.doi.org/10.3762/bjnano.3.33 | DOI Listing |
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