CAJ | 학술논문

针对激光陀螺测量误差对船体自主变形测量精度的影响问题，在角速度匹配方程基础上提出了一种信号同步积分求解变形角的方法。根据船体角运动的周期特性，利用实测船体运动角速度信号产生时序同步信号，并与角速度匹配方程相乘得到新的测量方程，使得包含变形角信息的有用信号通过积分得到增强，而陀螺误差则被调制为随机信号，积分后被抑制，从而提高了测量方程的信噪比。仿真结果表明：当积分时间大于5 min时，变形角测量误差的均方根值（RMS）小于10"，且随着积分时间的增加，测量精度将会提高。这种同步积分方法不需要对陀螺误差建模即可实现对船体变形的高精度测量，而且直观地解释了在激光陀螺误差存在条件下自主变形测量误差不随时间发散的原因。
침대격광타라측량오차대선체자주변형측량정도적영향문제，재각속도필배방정기출상제출료일충신호동보적분구해변형각적방법。근거선체각운동적주기특성，이용실측선체운동각속도신호산생시서동보신호，병여각속도필배방정상승득도신적측량방정，사득포함변형각신식적유용신호통과적분득도증강，이타라오차칙피조제위수궤신호，적분후피억제，종이제고료측량방정적신조비。방진결과표명：당적분시간대우5 min시，변형각측량오차적균방근치（RMS）소우10"，차수착적분시간적증가，측량정도장회제고。저충동보적분방법불수요대타라오차건모즉가실현대선체변형적고정도측량，이차직관지해석료재격광타라오차존재조건하자주변형측량오차불수시간발산적원인。
A synchronization integral method based on the angular matching function is presented for reducing the influence of the ring laser gyro (RLG) error in ship deformation measurement. Specifically, the method produce the synchronization time series from the ship angular rate signal according to the period characteristics of ship angular motion, and then the time series are multiplied by the angular matching function to get a new measurement function. As a result, the signals with the deformation information are strengthen through integral, while the RLG errors are modulated to random signals and reduced through integral. Therefore, the signal to noise ratio of measurement function is improved through synchronization integral. Simulation results show that the deformation measurement can achieve an accuracy of 10 arcsecs (RMS) within 5 min, and the accuracy can even be improved when with longer integral time. This synchronization method can solve the ship deformation values to reach high accuracy without requiring a priori knowledge of RLG error model. Additionally, it also directly depicts the reason why ship deformation measurement error is not increased with time when RLG errors exist.