中国惯性技术学报
中國慣性技術學報
중국관성기술학보
JOURNAL OF CHINESE INERTIAL TECHNOLOGY
2010年
1期
76-80
,共5页
李玎%卜雄洙%向超%曹志谦
李玎%蔔雄洙%嚮超%曹誌謙
리정%복웅수%향초%조지겸
旋转弹体%微惯性传感器%磁传感器%Kalman滤波器%姿态确定
鏇轉彈體%微慣性傳感器%磁傳感器%Kalman濾波器%姿態確定
선전탄체%미관성전감기%자전감기%Kalman려파기%자태학정
spinning projectile%MEMS inertial sensors%magnetic sensors%Kalman filter%attitude determination
微惯性传感器精度较低,其漂移会引起很大的姿态误差,不能提供长时间稳定姿态;磁传感器组合的姿态角误差不随时间累积但姿态角更新速度慢.针对这一问题提出了利用磁/惯性传感器构建低成本姿态探测系统的方案,设计了Kalman滤波器融合二者信息--以磁传感器解算的姿态角和等效旋转矢量法解算的姿态角之差作为观测量,以惯性传感器的漂移和姿态误差角作为状态变量,整个解算过程无需使用地磁场强度.仿真结果表明了该算法的有效性,二者组合定姿可实现高精度的姿态测量.
微慣性傳感器精度較低,其漂移會引起很大的姿態誤差,不能提供長時間穩定姿態;磁傳感器組閤的姿態角誤差不隨時間纍積但姿態角更新速度慢.針對這一問題提齣瞭利用磁/慣性傳感器構建低成本姿態探測繫統的方案,設計瞭Kalman濾波器融閤二者信息--以磁傳感器解算的姿態角和等效鏇轉矢量法解算的姿態角之差作為觀測量,以慣性傳感器的漂移和姿態誤差角作為狀態變量,整箇解算過程無需使用地磁場彊度.倣真結果錶明瞭該算法的有效性,二者組閤定姿可實現高精度的姿態測量.
미관성전감기정도교저,기표이회인기흔대적자태오차,불능제공장시간은정자태;자전감기조합적자태각오차불수시간루적단자태각경신속도만.침대저일문제제출료이용자/관성전감기구건저성본자태탐측계통적방안,설계료Kalman려파기융합이자신식--이자전감기해산적자태각화등효선전시량법해산적자태각지차작위관측량,이관성전감기적표이화자태오차각작위상태변량,정개해산과정무수사용지자장강도.방진결과표명료해산법적유효성,이자조합정자가실현고정도적자태측량.
The low accuracy of MEMS inertial sensors cannot provide long-time steady attitude due to large attitude error caused by drift, and the attitude error calculated by magnetic sensors is not accumulated with time, the speed of attitude update is slowly. In order to solve these questions, a low cost scheme of full attitude detection system composed of inertial sensors and magnetic sensors is presented, and the Kalman filter is adopted to merge the information comed from inertial sensors and magnetic sensors. The difference between attitude angles calculated by magnetic sensors and method of equivalent rotation vector is used as the observed value, and the drift of inertial sensors and the error of attitude angles are used as state vector. The geomagnetic field strength needn't be known in solution. The effectiveness of this algorithm is demonstrated by simulation, and the high accuracy attitude measurement can be achieved by the composition of magnetic sensors and inertial sensors.