基于两磁传感器极值比值的弹体横滚姿态测量  

Roll Attitude Measurement of Spinning Projectile Based on Ratio of Extreme Value of Two Magnetic Sensors

作　　者：李玎[1] 卜雄洙[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《探测与控制学报》2009年第4期49-53,57,共6页Journal of Detection & Control

摘　　要：针对高转速弹体飞行过程中的高速旋转,微惯性器件无法满足测量要求的问题,提出利用两个磁传感器组合测量姿态的方法。将磁传感器组合中的一个与弹轴成锐角安装,利用两磁传感器输出的极值信息,采用极值比值的方法确定姿态,无需知道地磁场强度且解算过程中只需要标量运算。与Thomas Harkins,DavidHepner提出的零交叉法相比,姿态角信息多且是单值的。针对极值比值算法及磁传感器安装角度误差进行了仿真,仿真结果表明:该算法具有较高的精度,解算的姿态角与真实姿态角相符;对磁传感器的位置误差修正后,姿态角的解算精度有所提高。For the problem that the attitude measurement using inertial sensors cannot meet the requirement of high-speed spinning projectile, two magnetic sensors are proposed for measuring attitude angles. One of the two magnetic sensors is installed in acute angle with the projectile axis, and a method called the ratio of extreme value is proposed to detect the attitude angles based on the extreme value of outputs of the two magnetic sensors. In this method, no knowledge of the geomagnetic field strength is required and only scalar operations are needed. More angles which are of single value can be obtained by using the given method than obtained by using the zero crossing method provided by Thomas Harkins and David Hepner. The algorithm of extreme value ratio and the location error of magnetic sensors are simulated. The result indicates that by using this algorithm which is of high precision, the estimated roll angle conforms to the true angle; the accuracy of the attitude angles is improved greatly with the corrected location error.

关 键 词：姿态测量 磁传感器 高转速弹体 横滚 

分 类 号：TJ765.4[兵器科学与技术—武器系统与运用工程]