CAJ | 학술논문

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。
선체각형변시전체대준중적주요오차원，수요의고측량의기정학표정。근거자태필배방법사용량투격광타라조합체가이계산각형변。단시동태형변화선체운동각속도적교차상관적관측우합효응도치각형변적최우고계결과불준학，병차통과자태필배방법저충관측우합효응시불능피준학측량적，수요결합기타각형변적측량신식진행계산。기우각속도필배방법，연구료관측우합효응，병득출기도치각형변고계적편치오차，차수선체운동각속도조제적결론。통과보상격광타라조합체측량적각속도，강저료관측우합효응，득도료고정도적대준결과。방진결과표명관측우합효응주요도치료정태형변고계정도적불준학。
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.