Analysis and Design of Closed-Loop Detection Technique for Micro-Grating Accelerometer

被引：18

作者：

Li, Hui ^{[1
]}

Li, Shuokai ^{[1
]}

Deng, Keke ^{[1
]}

Gao, Shan ^{[1
]}

Feng, Lishuang ^{[1
]}

机构：

[1] Beihang Univ, Sch Instrumentat Sci & Optoelect Engn, Beijing 100191, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2018年 / 36卷 / 24期

基金：

中国国家自然科学基金;

关键词：

Closed-loop detection; control; micro-grating accelerometer; signal process; MODULATION; ACTUATION; SENSOR; NOISE;

D O I：

10.1109/JLT.2018.2878097

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel closed-loop control method with Pound-Drever-Hall modulation technology is proposed to optimize the linearity and detection accuracy of micro-grating accelerometer in practical application. The closed-loop error is modulated to a high frequency for eliminating the direct current component of the interference intensity and stray light disturbance. After phase sensitive detector and filter of demodulation, the closed-loop error signal is obtained with high signal-to- noise ratio. Based on the principle of designed modulation and demodulation method, the dynamic model of closed-loop micro-grating accelerometer is established considering the nonlinear interference effect, optical intensity fluctuation, and unavoidable noise. Then, a robust control algorithm is designed to optimize the performance of micrograting accelerometer. The experimental results demonstrate that the micro-grating accelerometer has linearity within 0.35% and the bias stability 0.2 mg, which validate the effectiveness and usefulness of the proposed closed-loop detection scheme.

引用

页码：5738 / 5745

页数：8

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