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An improved dynamic model of tuning fork probe for scanning probe microscopy
Author(s) -
NG B.P.,
ZHANG Y.,
KOK S.W.,
SOH Y.C.
Publication year - 2009
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2009.03160.x
Subject(s) - tuning fork , sensitivity (control systems) , scanning probe microscopy , fork (system call) , noise (video) , biological system , computer science , materials science , physics , acoustics , nanotechnology , electronic engineering , vibration , engineering , artificial intelligence , image (mathematics) , biology , operating system
Summary This paper presents a two coupled oscillators model to describe the dynamics of a tuning fork with a probe attached. The two coupled oscillators are unbalanced only in their effective masses and the damping ratios. By applying a frequency domain system identification approach in experimental investigation of various probe attachment cases, a good accuracy of the model is demonstrated. The effectiveness of the model is further demonstrated in quantitative analysis of the noise performance and the sensitivity of force sensing with a tuning fork probe. Compared with existing models, the proposed model can more accurately characterize the dynamics of a tuning fork probe.