Synchronized oscillation in micro-mechanically coupled oscillator system: Part I - Synchronization bandwidth

A novel oscillation system, consisting of a U-shaped cantilever and a beam-shaped cantilever, was designed, fabricated and characterized for synchronized oscillation-based ultimate sensing applications in our past studies. This paper reports that the effect of nonlinear vibration on double region of synchronized frequency responses so as to further expand the applicable limits for practical mass perturbation. The resonant frequency was multiplied via synchronization by introducing two coupling overhangs, and the double region was expanded from 70 Hz to over 500 Hz by increasing the driving voltage (induced power). This expansion 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.