静电陀螺监控器低纬度避免标定重置的快速预测方法  

Rapid prediction method for avoiding ESGM's calibration reset in low latitude area

作　　者：王前学[1] 倪文秀[2] 刘新明[1] 周海渊[1] 

机构地区：[1]中国卫星海上测控部,江阴214431 [2]天津航海仪器研究所,天津300131

出　　处：《中国惯性技术学报》2014年第6期707-710,718,共5页Journal of Chinese Inertial Technology

摘　　要：在低纬度地区,静电陀螺监控器48 h标定阶段易出现上陀螺高度角低于限定值,导致标定重置的问题。为了避免标定重置问题的出现,根据转子自转轴空间指向的变化特点,利用上陀螺的测角数据、惯导航向和位置数据,综合船舶运动、地球自转、壳体旋转的影响,推导出了预测上陀螺高度角的计算方法,并提出了适时调整载体所处纬度的规避方案。根据计算结果绘制了转子自转轴空间运动轨迹,实现了标定重置时间点的预测,预测误差小于3 min。该方法只需要很少的原始测量数据,预测精度高,提出的规避方案可操作性强,具有一定的推广应用价值。During ESGM's 48 h calibration phase at low latitudes, it may occur that the altitude angle of pole gyro is below the threshold, resulting in the problem of calibration reset. In order to solve this problem, a calculation method for predicting the altitude angle was derived based on the directive characteristics of rotor shaft by using various navigation data and taking account of various influences. In addition, an avoidance scheme for timely adjusting the vehicle at a latitude was put forward. The method requires only a few original measurement data and possesses such advantages as high forecast precision and high maneuverability, showing that it is worthy of broad application.

关 键 词：静电陀螺仪 高度角 方位角 标定 

分 类 号：U666.1[交通运输工程—船舶及航道工程]