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On the Mode Localization Between Two Unidentical Resonators with Different Bending Modes for Acceleration Sensing.
Bo Yang1, Ming Lyu1,2, Jian Zhao3
1Transportation Institute, Inner Mongolia University, Hohhot 010021, China.
Sensors (Basel, Switzerland)
|September 27, 2025
Summary
This study introduces a new accelerometer using mode localization in coupled resonators. Adjusting voltage enhances sensitivity, offering a novel approach for multi-mode microelectromechanical systems accelerometers.
Area of Science:
- Mechanical Engineering
- Microelectromechanical Systems (MEMS)
- Vibrational Analysis
Background:
- Traditional accelerometers face limitations in sensitivity and performance.
- Microelectromechanical systems (MEMS) accelerometers are crucial for various applications.
- Mode localization offers a potential mechanism for enhanced sensing.
Purpose of the Study:
- To propose and analyze a novel accelerometer concept based on mode localization.
- To investigate the dynamic behavior of coupled resonators for acceleration sensing.
- To explore methods for enhancing accelerometer sensitivity through nonlinear dynamics.
Main Methods:
- Utilizing Euler-Bernoulli beam theory to derive governing equations for coupled resonators.
- Applying Galerkin discretization and the multiple-scale method for analysis.
- Simulating sensor performance in both linear and nonlinear operating regions.
Main Results:
- The proposed sensor design effectively monitors acceleration via changes in the amplitude ratio of coupled resonators.
- Nonlinear dynamics significantly increase accelerometer sensitivity.
- Sensitivity can be further improved by adjusting coupling voltage without compromising mode separation.
Conclusions:
- The presented mode-localization-based accelerometer offers a viable method for enhancing performance in multi-mode MEMS devices.
- Tuning drive voltage allows for control over the sensor's dynamic behavior.
- This research provides a pathway for developing more sensitive and efficient MEMS accelerometers.
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