一种改进的挠性陀螺POS标度因数误差补偿方法  

Modified compensation method for the scale factor errors of dynamically tuned gyroscope POS

作　　者：郭佳[1] 钟麦英[1] 

机构地区：[1]北京航空航天大学惯性技术重点实验室新型惯性仪表与导航系统技术国防重点学科实验室,北京100191

出　　处：《仪器仪表学报》2012年第7期1469-1476,共8页Chinese Journal of Scientific Instrument

基　　金：国家973计划(2009CB724000);国家863计划(2008AA121302);国家自然科学基金(61174121;60736025)资助项目

摘　　要：针对航空遥感的作业环境特点,分析了一类位置姿态测量系统(position and orientation system,POS)用挠性陀螺的标度因数与输入角速度之间的关系。通过实验发现了在小角速率范围内陀螺标度因数与输入角速度呈规律性的"双曲线"关系。提出了一种改进的多位置动静混合误差标定与补偿方法。首先根据输入角速度的正负分别标定陀螺标度因数并建立两者的对应关系,然后在误差补偿时根据输入角速度的方向和数值变化更新标度因数及其他误差系数,进而提高误差补偿精度。实验结果表明,利用改进方法进行误差补偿后POS角测量精度可以提升约20%。Considering the special application condition of position and orientation system （POS） used in airborne remote sensing, the influence of the input angular velocity on scale factor errors of POS is studied and a hyperbolic regression curve of the scale factor as the function of the input angular velocity in small angular rate range is discovered through experiments. And a modified hybrid multiposition calibration and error compensation method is proposed. Firstly the scale factors of the gyros are calibrated according to the input angular velocity to establish their corresponding relationship. Secondly the system errors are compensated according to the scale factors and other error coefficients timely updated as the angular velocity varies. At last the results of some experimental tests demonstrate that the proposed method could effectively compensate the scale factor errors of POS and promote the angular meas- urement precision by about 20%

关 键 词：挠性陀螺 位置姿态测量系统 标度因数 标定 误差补偿 

分 类 号：TH89[机械工程—仪器科学与技术]