哥氏加速度对火箭橇试验的影响分析  

Analysis of Coriolis acceleration's impact on rocket sled experiment

作　　者：王超[1] 王跃钢[1] 李宁[2] 

机构地区：[1]第二炮兵工程学院,西安710025 [2]第二炮兵装备研究院,北京100085

出　　处：《中国惯性技术学报》2010年第3期378-381,共4页Journal of Chinese Inertial Technology

基　　金：国家重点基础研究发展计划项目(61355020301)

摘　　要：火箭橇试验高速度的特性,使得由于地球自转产生的哥氏加速度变的不容忽略,在进行惯性测量单元的火箭橇试验时必须分析并消除哥氏加速度的影响。本文建立了三个坐标系,从哥氏定律出发推导出绝对加速度的表达式;进一步推导出加速度计输出、外测加速度与哥氏加速度在滑轨坐标系三个轴的关系表达式;最后通过试验数据对理论分析进行了验证。结果表明,哥氏加速度的影响随着滑橇速度的上升而变大,将逐渐掩盖交叉耦合项误差,对此应根据哥氏加速度在滑轨坐标系的表达式进行补偿。Due to rocket sled＇s high velocity,the impact of Coriolis acceleration can not be ignored,and should be eliminated in the rocket sled experiment for Inertial Measurement Units（IMU）.In this paper,three coordinate systems are built,and the expression of absolute acceleration is deduced from the Coriolis law.The relational expression of the accelerometer output,the measured acceleration,and the Coriolis acceleration in the rail-coordinate system are deduced.Finally,based on the experiment data,the verification of theoretical analysis is conducted.The result suggests that the acceleration errors due to Coriolis acceleration increases with the sled velocity,and would gradually overshadows the acceleration error due to cross coupling,thus they should be compensated based on the expression of Coriolis acceleration in the rail-coordinate system.

关 键 词：火箭橇试验 哥氏加速度 惯性测量单元 误差 

分 类 号：U666.1[交通运输工程—船舶及航道工程]