Phase-delay induced variation of synchronization bandwidth and frequency stability in a micromechanical oscillator

Phase feedback is commonly utilized to set up a synchronized MEMS oscillator for high performance sensor application. It is a consensus that the synchronization region varies with phase delay with an ‘Anti-U’ mode. In this paper, phase-delay induced variation of synchronization bandwidth and frequen...

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Bibliographic Details
Published in:Nonlinear dynamics 2021-09, Vol.105 (4), p.2981-2994
Main Authors: Shi, Zhan, Pu, Dong, Wang, Xuefeng, Huan, Ronghua, Jiang, Zhuangde, Wei, Xueyong
Format: Article
Language:English
Subjects:
Automotive Engineering
Bandwidths
Classical Mechanics
Control
Delay
Dynamical Systems
Engineering
Feedback
Frequency stability
Frequency variation
Mathematical analysis
Mechanical Engineering
Nonlinearity
Original Paper
Oscillators
Stability analysis
Synchronism
Vibration
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Summary:Phase feedback is commonly utilized to set up a synchronized MEMS oscillator for high performance sensor application. It is a consensus that the synchronization region varies with phase delay with an ‘Anti-U’ mode. In this paper, phase-delay induced variation of synchronization bandwidth and frequency stability in a micromechanical oscillator is investigated analytically and experimentally. The analytical expression for predicting the synchronization bandwidth with phase delay is derived based on the mathematic model. An additional dynamic extreme point of synchronization bandwidth actuated by nonlinearity is observed, which leads to three different types (‘U’, ‘Anti-U’ and ‘M’) of variation pattern of synchronization bandwidth as feedback tuning. The variation of frequency stability along phase delay is also studied. The synchronization bandwidth and the frequency stability have exactly opposite variation pattern with phase delay in linear oscillators while they are totally consistent in nonlinear oscillators. Experimental results validate the analytical observations. Our work provides a precise way for achieving best performance of a synchronized MEMS oscillator in the sensor application.
ISSN:0924-090X
1573-269X
DOI:10.1007/s11071-021-06783-8