Stability Analysis in High-Order Electromechanical Sigma-Delta Accelerometer

被引：0

作者：

Liu, Yuntao ^{[1
]}

Liu, Xiaowei ^{[2
]}

Chen, Weiping ^{[2
]}

Wu, Qun ^{[2
]}

机构：

[1] Harbin Engn Univ, Coll Informat & Commun Engn, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, MEMS Ctr, Harbin 150001, Peoples R China

来源：

MEMS/NEMS NANO TECHNOLOGY | 2011年 / 483卷

关键词：

Accelerometer; Sigma-delta; Stability; High-order; MODULATION;

D O I：

10.4028/www.scientific.net/KEM.483.716

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A nonlinearity model including distortion components for sigma-delta (Sigma Delta) accelerometer that allows stability analysis is described. Based on this model, closed-loop stability and signal dependent stability are analyzed detailedly. To verify the conclusions, Matlab/Simulink model for a fourth-order Sigma Delta accelerometer is designed. The simulation results indicate that high-order system needs a large compensation coefficient, and it will not affect the performance due to the very high low-frequency gain of the loop filter. High-order system is conditionally stable, and stability is affected by the input signal.

引用

页码：716 / +

页数：2

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