Demonstration of Multiple Internal Resonances in a Microelectromechanical Self-Sustained Oscillator
Demonstration of Multiple Internal Resonances in a Microelectromechanical Self-Sustained Oscillator
复制标题
微机电自维持振荡器中多重内共振的演示
DOI：
10.1103/physrevapplied.13.014049
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发表时间：
2020-01-27
影响因子：
4.6
通讯作者：
Yamaguchi, H.
中科院分区：
文献类型：
--
作者：
Houri, S.;Hatanaka, D.;Yamaguchi, H.
我们研究了支持多种共振和相互作用模式的微机电自维持振荡器的动力学。特别是，研究了前四种弯曲模态与第一种扭转模态的相互作用，其中出现1:2,1:3和2:1的内部共振。通过破坏结构的纵向对称性，诱导偶模和奇模耦合。在第二弯模态中，通过增益反馈回路诱导自振荡；此后，其频率被拉入与其他模式相称的频率比，使振荡器同时充当四个模式的驱动器或泵浦。
We investigate the dynamics of a microelectromechanical self-sustained oscillator supporting multiple resonating and interacting modes. In particular, the interaction of the first four flexural modes along with the first torsional mode are studied, whereby 1:2, 1:3, and 2:1 internal resonances occur. Even and odd modes are induced to couple by breaking the longitudinal symmetry of the structure. Self-oscillations are induced in the second flexural mode via a gain-feedback loop; thereafter its frequency is pulled into a commensurate frequency ratio with the other modes, enabling the oscillator to act as a driver or pump for four modes simultaneously.