激光陀螺组合体测量船体角形变中观测耦合效应的补偿（英文）  

Compensation for observed coupling effect in measuring angular deformation of ship hull by laser gyroscope units

作　　者：杨云涛[1] 王省书[1] 黄宗升[1] 吴伟[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《中国惯性技术学报》2014年第5期561-566,共6页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金项目(11172323)

摘　　要：船体角形变是传递对准中的主要误差源,需要依靠测量仪器精确标定。根据姿态匹配方法使用两套激光陀螺组合体可以计算角形变。但是动态形变和船体运动角速度的交叉相关的观测耦合效应导致角形变的最优估计结果不准确,并且通过姿态匹配方法这种观测耦合效应是不能被准确测量的,需要结合其它角形变的测量信息进行计算。基于角速度匹配方法,研究了观测耦合效应,并得出其导致角形变估计的偏置误差,且受船体运动角速度调制的结论。通过补偿激光陀螺组合体测量的角速度,降低了观测耦合效应,得到了高精度的对准结果。仿真结果表明观测耦合效应主要导致了静态形变估计精度的不准确。Angular deformation of ship hull is a main alignment error source in transfer alignment and must be accurately calibrated by measurement equipment. By using two laser gyroscope units (LGUs), the angular deformation of ship hull is calculated by attitude matching method. But the observation coupling effect induced by the cross correlation of dynamic deformation and angular rate of ship motion leads to inaccuracy results of optimal estimation. The observation coupling effect cannot be measured by the attitude matching method, and must be measured by other instruments. According to angular rate matching method, the observed coupling effect is studied, and a bias error which causing angular deformation is obtained. It is shown that the bias error can be modulated by angular rate of ship motion. By compensating the angular rate measured by LGUs, the coupling effect is reduced, and high-accuracy alignment results can be achieved. Simulations validates that it is the coupling effect that leads to inaccuracy evaluation of static deformation.

关 键 词：角形变测量 姿态匹配 观测耦合效应 静态形变 激光陀螺组合体 

分 类 号：U666.1[交通运输工程—船舶及航道工程]