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高沖擊加速度傳感器頻響窄脈沖標定測試技術(shù)
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北京理工大學(xué)

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國家自然科學(xué)基金面上項目(61773059),國防技術(shù)基礎科研項目(2020148),國家標準制定項目(202020230028)。


High-g Accelerometer Frequency Response Calibration Test Technology Based on Narrow Pulse Principle
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    摘要:

    針對高沖擊加速度傳感器的頻響計量測試問(wèn)題,設計了一種可實(shí)現沖擊加速度傳感器頻響窄脈寬標定系統。該系統采用Hopkinson桿為試驗裝置,以激光多普勒測速儀作為基準信號測量裝置,基于窄脈沖頻響計量測試原理,采用漢寧窗和三次插值方法對信號進(jìn)行處理,基于LabVIEW和MATLAB開(kāi)發(fā)環(huán)境編寫(xiě)數據處理程序,實(shí)現對被校MEMS沖擊傳感器頻響的快速解算。試驗結果表明,該系統能夠快速解算出高沖擊加速度傳感器的幅頻特性函數,對傳感器工作頻帶的估計誤差低于10%。該系統避免了不同窄脈沖激勵條件下,對基準信號和加速度傳感器輸出信號進(jìn)行處理的復雜流程,采用適于常規輸入信號的信號處理方法,提升了約20%頻響測試效率,實(shí)現了對加速度傳感器頻響的快速標定測試。

    Abstract:

    In order to calibrate the frequency response of high-g accelerometer, a system for calibrating the frequency response of high-g accelerometer with narrow pulse width is designed in this paper. The system uses the Hopkinson bar as the test device, the laser Doppler velocimeter as the reference signal measuring device, based on the measurement principle of narrow pulse frequency response. The Hanning window and cubic interpolation method with higher accuracy are selected to process the signal, and the program is written on the LabVIEW and MATLAB development environment to realize the calculation of the frequency response of the calibrated MEMS high g accelerometer. The test results show that the system can calculate the amplitude-frequency characteristics of high-g accelerometers, the estimated error of the working frequency band of the sensor is less than 10%, and the obtained sensor frequency response characteristics are consistent. So as to improve the efficiency of frequency response calculation, the system abandons the previous specialized signal processing method, adopts a signal processing method that is generally applicable to input signals, improved the frequency response test efficiency by about 20%, and this system is practical in the fast calibration test of accelerometer frequency response.

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郝彥朋,張振海,許朝陽(yáng),何光.高沖擊加速度傳感器頻響窄脈沖標定測試技術(shù)計算機測量與控制[J].,2020,28(10):30-34.

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歷史
  • 收稿日期:2020-08-03
  • 最后修改日期:2020-08-21
  • 錄用日期:2020-08-21
  • 在線(xiàn)發(fā)布日期: 2020-10-21
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