研究了一种海上对准算法,利用GPS提供外部参考信息(速度、位置信息)构建数学隔离平台,隔离风浪造成的摇摆运动;根据单轴旋转系统误差传播规律,在旋转坐标系下采用卡尔曼滤波方法,实现系统精对准,并对Z陀螺刻度系数进行了估计与补偿,有...研究了一种海上对准算法,利用GPS提供外部参考信息(速度、位置信息)构建数学隔离平台,隔离风浪造成的摇摆运动;根据单轴旋转系统误差传播规律,在旋转坐标系下采用卡尔曼滤波方法,实现系统精对准,并对Z陀螺刻度系数进行了估计与补偿,有利于提高单轴旋转系统的性能。仿真结果表明,采样频率为1 k Hz时,经过2500 s精对准,平台偏角、陀螺漂移、加速度计零偏和Z陀螺刻度系数误差估计值达到系统要求。展开更多
An effective and flexible rotation and compensation scheme is designed to improve the accuracy of rotating inertial navigation system （RINS）. The accuracy of single-axial R1NS is limited by the errors on the rotatin...An effective and flexible rotation and compensation scheme is designed to improve the accuracy of rotating inertial navigation system （RINS）. The accuracy of single-axial R1NS is limited by the errors on the rotating axis. A novel inertial measurement unit （IMU） scheme with error compensation for the rotating axis of fiber optic gyros （FOG） RINS is presented. In the scheme, two couples of inertial sensors with similar error characteristics are mounted oppositely on the rotating axes to compensate the sensors error. Without any change for the rotation cycle, this scheme improves the system＇s precision and reliability, and also offers the redundancy for the system. The results of 36 h navigation simulation prove that the accuracy of the system is improved notably compared with normal strapdown INS, besides the heading accuracy is increased by 3 times compared with single-axial RINS, and the position accuracy is improved by 1 order of magnitude.展开更多
文摘研究了一种海上对准算法,利用GPS提供外部参考信息(速度、位置信息)构建数学隔离平台,隔离风浪造成的摇摆运动;根据单轴旋转系统误差传播规律,在旋转坐标系下采用卡尔曼滤波方法,实现系统精对准,并对Z陀螺刻度系数进行了估计与补偿,有利于提高单轴旋转系统的性能。仿真结果表明,采样频率为1 k Hz时,经过2500 s精对准,平台偏角、陀螺漂移、加速度计零偏和Z陀螺刻度系数误差估计值达到系统要求。
基金supported by the National Natural Science Foundation of China (No.40904018)the Key Laboratory Foundation of the Ministry of Education of China (No.201001)the Doctoral Innovation Foundation of Naval University of Engineering (No.BSJJ2011008)
文摘An effective and flexible rotation and compensation scheme is designed to improve the accuracy of rotating inertial navigation system （RINS）. The accuracy of single-axial R1NS is limited by the errors on the rotating axis. A novel inertial measurement unit （IMU） scheme with error compensation for the rotating axis of fiber optic gyros （FOG） RINS is presented. In the scheme, two couples of inertial sensors with similar error characteristics are mounted oppositely on the rotating axes to compensate the sensors error. Without any change for the rotation cycle, this scheme improves the system＇s precision and reliability, and also offers the redundancy for the system. The results of 36 h navigation simulation prove that the accuracy of the system is improved notably compared with normal strapdown INS, besides the heading accuracy is increased by 3 times compared with single-axial RINS, and the position accuracy is improved by 1 order of magnitude.
