Stability Analysis in High-Order Electromechanical Sigma-Delta Accelerometer

Yun Tao Liu; Xiao Wei Liu; Wei Ping Chen; Qun Wu

doi:10.4028/www.scientific.net/KEM.483.716

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 483Stability Analysis in High-Order Electromechanical...

Stability Analysis in High-Order Electromechanical Sigma-Delta Accelerometer

Abstract:

A nonlinearity model including distortion components for sigma-delta (ΣΔ) 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 ΣΔ 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.

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Periodical:

Key Engineering Materials (Volume 483)

Pages:

716-720

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.483.716

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Online since:

June 2011

Authors:

Yun Tao Liu, Xiao Wei Liu, Wei Ping Chen, Qun Wu

Keywords:

Accelerometer, High-Order, Sigma-Delta, Stability

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