在单轴旋转惯导系统中,z向旋转轴陀螺漂移由于不能被旋转调制成影响系统导航性能的主要误差因素。另外,为了缓解对准过程中对准精度与对准时间的矛盾,在有限的对准时间内最大程度的保证对准精度并能够辨识出z轴陀螺漂移,该文提出了一种...在单轴旋转惯导系统中,z向旋转轴陀螺漂移由于不能被旋转调制成影响系统导航性能的主要误差因素。另外,为了缓解对准过程中对准精度与对准时间的矛盾,在有限的对准时间内最大程度的保证对准精度并能够辨识出z轴陀螺漂移,该文提出了一种静基座条件下,基于时间正逆向解算算法并通过增加航向角量测量,利用最小二乘法进行参数辨识的快速对准方法。该算法不仅能缩短对准时间,还能快速估计z轴陀螺漂移,提高导航精度。以现有的单轴旋转光纤陀螺惯导系统进行试验,结果表明,误差补偿后,系统定位精度提高了约24%,定位误差小于2 n mile/12 h。展开更多
The laser gyro is most su it able for building the strap down inertial navigation system (SINS), and its acc uracy of attitude algorithm can enormously affect that of the laser SINS. This p aper develops three improv...The laser gyro is most su it able for building the strap down inertial navigation system (SINS), and its acc uracy of attitude algorithm can enormously affect that of the laser SINS. This p aper develops three improved algorithmal expressions for strap down attitude ut ilizing the angular increment output by the laser gyro from the last two and cur rent updating periods according to the number of gyro samples, and analyses the algorithm error in the classical coning motion. Compared with the conventional algorithms, simulational results show that this improved algorithm has higher precision. A new way to improve the rotation vector algorithms is provided.展开更多
文摘在单轴旋转惯导系统中,z向旋转轴陀螺漂移由于不能被旋转调制成影响系统导航性能的主要误差因素。另外,为了缓解对准过程中对准精度与对准时间的矛盾,在有限的对准时间内最大程度的保证对准精度并能够辨识出z轴陀螺漂移,该文提出了一种静基座条件下,基于时间正逆向解算算法并通过增加航向角量测量,利用最小二乘法进行参数辨识的快速对准方法。该算法不仅能缩短对准时间,还能快速估计z轴陀螺漂移,提高导航精度。以现有的单轴旋转光纤陀螺惯导系统进行试验,结果表明,误差补偿后,系统定位精度提高了约24%,定位误差小于2 n mile/12 h。
文摘The laser gyro is most su it able for building the strap down inertial navigation system (SINS), and its acc uracy of attitude algorithm can enormously affect that of the laser SINS. This p aper develops three improved algorithmal expressions for strap down attitude ut ilizing the angular increment output by the laser gyro from the last two and cur rent updating periods according to the number of gyro samples, and analyses the algorithm error in the classical coning motion. Compared with the conventional algorithms, simulational results show that this improved algorithm has higher precision. A new way to improve the rotation vector algorithms is provided.