环境力对离心机特性影响与补偿的分析建模  

Analysis and Modeling of Environmental Force Impact on Centrifuge Output Property and Compensation

作　　者：乔仁晓[1] 孟晓风[2] 戴冬冰[1] 李皎[2] 

机构地区：[1]天狮学院自动化学院,天津301700 [2]北京航空航天大学仪器光电学院,北京100191

出　　处：《测试技术学报》2010年第3期189-193,共5页Journal of Test and Measurement Technology

基　　金：国防科工委计划科研项目(J052006A106)

摘　　要：精密离心机是对加速度计等惯性器件进行高精度测试和校准的重要设备,其主要指标是输出加速度的量程和精度.本文分析了地球自转产生的哥氏力及空间引力场对精密离心机输出加速度的影响规律.通过对哥氏加速度和天体引力加速度矢量的正交分解,建立了两种干扰加速度在水平和垂直两个方向上影响规律的数学模型.提出了通过整周期平均或长时间平均来消除其误差影响的方法.Precise centrifuge is the key equipment for high-precision test and calibration of inertial components such as accelerometers. Its major specifications are the range and precision of the output acceleration. The study analyzed the rules how both the Coriolis acceleration by earth rotation and the gravitation of the celestial bodies influence the output acceleration of the centrifuge. The mathematical models were built about the influencing rules of these two types of acceleration both in the horizontal and the vertical directions by orthogonal decomposition. To compensate these errors, we proposed a method of limiting the sampling period to a whole number of cycles of periodic rotation rate variation or of sufficient long averaging time.

关 键 词：离心机 天体引力 哥氏加速度 误差建模 补偿 

分 类 号：O31[理学—一般力学与力学基础] TB9[理学—力学]