Stability Analysis in High-Order Electromechanical Sigma-Delta Accelerometer

Abstract:

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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.

Info:

Periodical:

Edited by:

Xiaohao Wang

Pages:

716-720

DOI:

10.4028/www.scientific.net/KEM.483.716

Citation:

Y. T. Liu et al., "Stability Analysis in High-Order Electromechanical Sigma-Delta Accelerometer", Key Engineering Materials, Vol. 483, pp. 716-720, 2011

Online since:

June 2011

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Price:

$35.00

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