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A decouple-decomposition noise analysis model for closed-loop mode-localized tilt sensors
Kunfeng Wang1,2,3, XingYin Xiong1, Zheng Wang4
1The State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China.
Microsystems & Nanoengineering
|December 22, 2023
Summary
This study introduces a novel decouple-decomposition (DD) noise model for mode-localized sensors. The model enhances resolution in tilt sensors by analyzing amplitude noise in weakly coupled resonators.
Area of Science:
- * Physics and Engineering
- * Sensor Technology
- * Signal Processing
Background:
- * Mode-localized sensors offer high sensitivity and resolution by utilizing coupled resonant modes.
- * Amplitude noise in the amplitude ratio (AR) is critical for sensor resolution but poorly understood in weakly coupled resonator circuits.
- * Existing sensing technologies face limitations that mode-localization aims to overcome.
Purpose of the Study:
- * To develop and validate a novel decouple-decomposition (DD) noise analysis model for mode-localized sensors.
- * To investigate and model amplitude noise within the closed-loop circuit of weakly coupled resonators.
- * To enhance the resolution of mode-localized tilt sensors.
Main Methods:
- * Application of a decouple-decomposition (DD) noise analysis model to a mode-localized tilt sensor.
- * Separation of weakly coupled resonators using a decoupling method that accounts for resonator nonlinearity.
- * Decomposition of the closed-loop circuit into distinct amplitude and phase noise analysis paths.
- * Verification of the DD model through MATLAB/Simulink simulations against theoretical analysis.
Main Results:
- * The DD noise model accurately predicts system noise in the closed-loop circuit of weakly coupled resonators.
- * A mode-localized tilt sensor achieved an input-referred instability of 3.91 × 10-4° at the optimal operating point.
- * The sensor demonstrated an input-referred amplitude ratio power spectral density (PSD) of 2.01 × 10-4°/√Hz.
- * The developed noise model is applicable to various mode-localized sensors.
Conclusions:
- * The DD noise model provides a robust framework for analyzing and mitigating noise in mode-localized sensors.
- * The validated model enables significant improvements in the resolution of tilt sensing applications.
- * This research contributes to advancing the performance and applicability of mode-localized sensing technologies.
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