Online measurement of coupled error angle between different axes of electrostatically suspended accelerometer

LIU Shuang; LIU Yun-feng; DONG Jing-xin

doi:10.3788/OPE.20152302.0415

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Online measurement of coupled error angle between different axes of electrostatically suspended accelerometer

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- Online measurement of coupled error angle between different axes of electrostatically suspended accelerometer
- Optics and Precision Engineering Vol. 23, Issue 2, Pages: 415-422(2015)
- 作者机构：
  
  清华大学精密仪器系高精度导航技术教育部重点实验室北京,100084
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152302.0415
  CLC： TH824.4;U666.1
- Received：07 July 2014，
  
  Revised：22 August 2014，
  
  Published：25 February 2015
- 稿件说明：
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刘爽, 刘云峰, 董景新. 静电悬浮加速度计轴间耦合误差角的在线测量[J]. 光学精密工程, 2015,23(2): 415-422

LIU Shuang, LIU Yun-feng, DONG Jing-xin. Online measurement of coupled error angle between different axes of electrostatically suspended accelerometer[J]. Editorial Office of Optics and Precision Engineering, 2015,23(2): 415-422
刘爽, 刘云峰, 董景新. 静电悬浮加速度计轴间耦合误差角的在线测量[J]. 光学精密工程, 2015,23(2): 415-422 DOI： 10.3788/OPE.20152302.0415.

LIU Shuang, LIU Yun-feng, DONG Jing-xin. Online measurement of coupled error angle between different axes of electrostatically suspended accelerometer[J]. Editorial Office of Optics and Precision Engineering, 2015,23(2): 415-422 DOI： 10.3788/OPE.20152302.0415.

摘要

静电悬浮加速度计轴间耦合误差角与悬浮质量块的平行度误差有关

而常规方法很难测量其大小和方向

故本文提出了一种变预载轴间耦合误差角在线测量方法。通过分析悬浮质量块平行度误差、耦合误差角、姿态角与静电力耦合的关系

推导了变预载法进行在线耦合误差角精确测量的原理和公式。设计了静电悬浮加速度计原理样机

并利用该样机对提出的测量方法进行了实验验证。实验测得

向对

Y/Z

向耦合误差角分别为-5.10×10

-4

rad和2.36×10

-5

rad

与理论分析相符。该方法同样适用于

向对

X/Z

及

向对

X/Y

的耦合误差角的在线测量。上述结果表明该方法可以有效、精确地完成静电悬浮加速度计不同轴之间耦合误差角的在线测量。

Abstract

The coupled angles between different axes of an Electrostatically Suspended Accelerometer (ESA) are related to the parallelism error of a sensor head

and it is hardly measured accurately by using classical methods. Therefore

a novel online measurement method for the coupling angles was proposed by a varying preload voltage. By modeling the relationship of the parallelism error

coupled angle

attitude angle and the electrostatic force coupled angle

the mechanism and equation of the varying preload voltage method for online measurement of the coupled angles were given. A ESA prototype was designed and then it was used to verify the proposed method. Experiment results show that the coupling angles of

X/Y

and

X/Z

are -5.10×10

-4

rad and 2.36×10

-5

rad

respectively

which are consistent with that of theoretical analysis. The method is also suitable for online measurement of the coupling angles for

Y/X

Y/Z

and

Z/X

Z/Y

. The result shows that this novel varying preload method can online identify the coupled angles of different axes of ESA effectively and accurately.

关键词

Keywords

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