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(Color online) (a) Electrically driven (ED) Q-Plus. The experimental plot of measured amplitude is well fitted by Eq. (1) and the resulting fitting parameters are used to construct the phase curve of Eq. (2). (b) Mechanically driven (MD) Q-Plus. The experimental resonance curve fits well Eq. (1) with .
(Color online) (a) Model circuit for electrically driven (ED) Q-Plus. [(b) and (c)] Comparison of the converted motion of ED Q-Plus, described by Eqs. (3) and (4), with the motion of the actual mechanically driven (MD) Q-Plus vs the change of (b) driving frequency and (c) driving amplitude of at .
(Color online) Comparison of preassumed applied force and reconstructed forces for different operation modes: (i) MD mode, (ii) ED mode which is converted by the conversion formulas [Eqs. (3) and (4)], and (iii) pure ED mode. Excellent agreement is found in both cases of (i) and (ii) but not for the case of (iii). Here , , and .
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