数字闭环加速度计的带宽测试

张晞; 李德燕; 王洪波; 李立京

doi:10.3788/OPE.20142201.0092

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数字闭环加速度计的带宽测试

微纳技术与精密机械 | 更新时间：2020-08-13

- 数字闭环加速度计的带宽测试
- Bandwidth measurement of digital closed-loop accelerometer
- 光学精密工程 2014年22卷第1期页码：92-98
- 作者机构：
  
  1. 上海航天控制技术研究所上海,200233
  2. 北京航空航天大学精密光机电一体化技术教育部重点实验室北京,100191
- 作者简介：
- 基金信息：
  
  “教育部新世纪优秀人才”基金资助项目()
- DOI：10.3788/OPE.20142201.0092
  中图分类号： TH824.4
- 收稿日期：2013-08-09，
  
  纸质出版日期：2014-01-15
- 稿件说明：
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张晞, 李德燕, 王洪波等. 数字闭环加速度计的带宽测试[J]. 光学精密工程, 2014,22(1): 92-98

ZHANG Xi, LI De-yan, WANG Hong-bo etc. Bandwidth measurement of digital closed-loop accelerometer[J]. Editorial Office of Optics and Precision Engineering, 2014,22(1): 92-98
张晞, 李德燕, 王洪波等. 数字闭环加速度计的带宽测试[J]. 光学精密工程, 2014,22(1): 92-98 DOI： 10.3788/OPE.20142201.0092.

ZHANG Xi, LI De-yan, WANG Hong-bo etc. Bandwidth measurement of digital closed-loop accelerometer[J]. Editorial Office of Optics and Precision Engineering, 2014,22(1): 92-98 DOI： 10.3788/OPE.20142201.0092.

摘要

为了测试数字闭环加速度计系统的带宽

对国军标1037A-2004中的电模拟法进行了改进。首先

讨论了用国军标1037A-2004中的电模拟法测试数字闭环加速度计带宽存在的不足

然后

对加入激励信号的数字闭环加速度计系统的检测电路及闭环控制模型进行分析。分析显示

在系统的反馈回路加入激励信号最终可以在输入端等效为外界输入加速度

且该系统的动态模型与传统机械激励测试法系统的动态模型一致。最后

提出一种在数字闭环加速度计的反馈回路外加激励信号来测试该系统带宽的方法。实验表明:数字闭环加速度计系统的实测-3 dB带宽值为320 Hz左右

与理论值(345 Hz)基本吻合。该方法具有精度高、误差源少、便于在线测试等特点

可满足大多数数字闭环加速度计的带宽测试要求。

Abstract

To measure the bandwidth of a digital closed-loop accelerometer

the electricity simulation method in GJB1037A-2004 was investigated. First

some drawbacks of measuring the bandwidth of the digital closed-loop accelerometer by using the electricity simulation method in GJB1037A-2004 were discussed. Then

the detection circuit and the closed-loop control system of the digital closed-loop accelerometer with an excitation signal were analyzed. The analysis shows that the effect of excitation signal added into a feedback circuit is equivalent to an input analog acceleration in the input end and the dynamic model of the digital closed-loop accelerometer is consistent with the dynamic model of the traditional mechanical system. Finally

a method which adds the excitation signal at the feedback circuit of the digital closed-loop accelerometer to measure the bandwidth of the accelerometer was proposed. Experimental results indicate that the -3 dB bandwidth data of the digital closed-loop accelerometer is about 320 Hz

which is close to theoretic data (345 Hz). The proposed method has the features of higher accurate

less error sources and convenient to test in online

and can satisfy the bandwidth testing requirement of most digital closed-loop accelerometers.

关键词

Keywords

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