基于五阶ΣΔ调制的微加速度计设计与仿真

Design and Simulation of Micro-Accelerometer Based on Fifth OrderΣΔModulation

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摘要为抑制加速度计信号带宽范围噪声,设计基于五阶ΣΔ调制器微机械加速度计闭环系统,并在MATLAB/Simulink下对该调制器进行建模,优化参数,通过行为级仿真讨论其稳定性。系统仿真显示:当输入幅值为1g、频率为256 Hz的加速度信号时,在1024 Hz信号带宽下信噪比为122.9 d B,有效位数为20.12位。 In order to suppress the bandwidth range noise of accelerometer signals,a closed-loop system based on a fifth-order ΣΔmodulator micromechanical accelerometer is designed,and the modulator is modelled under MATLAB/Simulink,the parameters are optimized,and the stability is discussed through behavioural level simulation.The system simulation shows that the signal-to-noise ratio is 122.9 dB with 20.12 effective bits at 1024 Hz signal bandwidth when an acceleration signal of 1 g and frequency of 256 Hz is input.

作者陈灵佳 Chen Lingjia(College of Instrumentation Science and Engineering,Southeast University,Nanjing Jiangsu 210096,China)

机构地区东南大学仪器科学与工程学院

出处《现代工业经济和信息化》 2024年第1期147-149,154,共4页 Modern Industrial Economy and Informationization

关键词微机械 ΣΔ调制闭环控制噪声 micromechanics ΣΔ modulation closed-loop control noise

分类号 TH824.4 [机械工程—精密仪器及机械]

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基于五阶ΣΔ调制的微加速度计设计与仿真

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