A Compensation Method for Nonlinear Vibration of Silicon-Micro Resonant Sensor

Area of Science:

• Micro-electromechanical systems (MEMS)
• Sensor technology
• Vibration analysis

Background:

• Silicon micro resonant sensors exhibit significant nonlinearity due to resonant beam vibrations.
• This nonlinearity leads to measurement errors, particularly frequency offsets.
• Accurate characterization of these nonlinear behaviors is crucial for sensor performance.

Purpose of the Study:

• To propose and validate a compensation method for nonlinear vibration in silicon micro resonant sensors.
• To reduce measurement errors caused by nonlinear vibration.
• To enhance the accuracy and reliability of micro resonant sensors.

Main Methods:

• Established a parameter characterization model for silicon micro resonant sensors.
• Developed a verification circuit to simulate nonlinear behavior and measurement errors.
• Proposed a compensation method using a dual-beam design with differential operations.
• Derived and compared measurement error, compensation rate, and residual for single-beam and double-beam configurations.

Main Results:

• The developed model accurately predicted the nonlinear behavior and frequency offset.
• The proposed compensation method significantly reduced measurement errors.
• Simulation and experimental results confirmed the effectiveness of the dual-beam compensation approach.
• The observed trends in measurement error and compensation rate aligned with theoretical predictions.

Conclusions:

• The proposed compensation method effectively mitigates nonlinear vibration effects in silicon micro resonant sensors.
• The dual-beam design with differential operations offers a viable solution for improving sensor accuracy.
• The study validates the compensation method through rigorous simulation and experimental analysis.