›› 2013, Vol. 33 ›› Issue (2): 19-24.doi: 10.3780/j.issn.1000-758X.2013.02.004

• 研究探讨 • 上一篇    下一篇

用杆臂效应在轨标定加速度计标度因数的方法

党建军1, 罗建军1, 万彦辉2   

  1. (1 西北工业大学航天学院,西安 710072)(2 西安精密机电研究所,西安 710100)
  • 收稿日期:2012-07-31 修回日期:2012-10-12 出版日期:2013-04-25 发布日期:2013-04-25
  • 作者简介:党建军 1974年生,2006年获西北工业大学航天工程专业硕士学位,现为西北工业大学飞行器设计专业博士研究生。研究方向是捷联惯组及组合导航技术。

Method of On-orbit Calibrating Scale Factor of Accelerometer Based on Lever Arm Effect

DANG  Jian-Jun1, LUO  Jian-Jun1, WAN  Yan-Hui2   

  1. ( 1 College of Astronautics, Northwestern Polytechnical University, Xi′an 710072) ( 2 Xi'an Aerospace Precision Electromechanical Institute, Xi'an 710100)
  • Received:2012-07-31 Revised:2012-10-12 Online:2013-04-25 Published:2013-04-25

摘要: 针对加速度计标度因数在轨标定精度低、成本高,需要其他辅助设备且难以工程实现等问题,提出了一种利用杆臂效应在轨标定加速度计标度因数的方法。用该方法对加速度计进行在轨标定,只需要惯组旋转机构按照给定的速率匀速旋转,根据惯组内陀螺仪及加速度计的输出即可解算出加速度计的标度因数。分析了标定原理,建立了标定模型,推导了误差系数的分离算法。通过地面试验验证了方法的有效性。

关键词: 杆臂效应, 在轨标定, 加速度计, 标度因数, 自主导航, 航天器

Abstract: Aimed at the low precision and high cost of onorbit calibrating accelerometer scale factor, as well as the auxiliary requirement and the difficulty in engineering implementation, a method of onorbit calibrating accelerometer scale factor based on the lever arm effect was presented. As long as the knob mechanism of the inertial assembly rotates uniformly at the given speed, the scale factor of the accelerometer can be calculated according to the output of the gyroscope and the accelerometer in the inertial assembly. The calibration principle was analyzed, the calibration model was built and the separation algorithm of the error coefficient was derived. The effect of this method was verified by the ground test.

Key words: Lever arm effect, On-orbit calibration, Accelerometer, Scale factor, Autonomous navigation, Spacecraft