Effect of nonlinear vibration on double region of synchronized frequency responses in mechanically coupled beam-shaped oscillator system

This paper reports that the effect of nonlinear vibration on double region of synchronized frequency responses in a mechanically coupled beam-shaped oscillator, so as to further expand the applicable limits for practical mass perturbation. The resonant frequency was multiplied via synchronization by introducing a coupling overhang, and the double region was magnified from 30 Hz to over 400 Hz by increasing the driving voltage (induced power). This magnification is believed to be related to nonlinear characteristic of coupled oscillator, and the relation between nonlinearity and synchronization should be clarified to achieve a design principle of mechanically coupled mass sensor for various ultimate sensing applications.