一种弱重力环境下的高速旋转载体滚动角快速对准方法

为解决高速旋转载体无控飞行段弱重力环境下惯导空中动基座对准问题，研究了基于旋转载体惯性信息特征的滚动角快速对准方法。首先分析了旋转载体的惯性信息特征。针对这一特征，提出了一种基于载波相位跟踪的滚动角对准方法，仅利用Y轴陀螺或Z轴陀螺信息即可实现滚动角的快速对准。为进一步提高该方法的适应性，充分利用Y轴陀螺或Z轴陀螺的信息，提出了一种基于双信源信息融合的惯导滚动角对准方法，以实现最优的滚动角跟踪结果。仿真与试验结果表明，该方法可在不依赖卫星、无初始姿态角且载体失重的条件下，5s内完成滚动角快速对准，且对准精度优于3°。该方法可自适应地剔除异常滚动角跟踪结果，有效提高了高速旋转载体用惯性导航系统对复杂力学环境的适应性与可靠性。

A Fast Alignment Method for Roll Angle of High Speed Rotating Carrier in Weak Gravity Environment

In order to solve the problem of inertial navigation in-flight moving base alignment under weak gravity environment in uncontrolled flight phase of high-speed rotating carrier, a fast rolling angle alignment method based on inertial information characteristics of rotating carrier is studied in this paper. Firstly, the inertial information characteristics of the rotating carrier are analyzed. In view of this feature, a roll angle alignment method based on carrier phase tracking is proposed. Only Y-axis or Z-axis gyroscope information can be used to achieve fast roll angle alignment. In order to further improve the adaptability of the method and make full use of the information of Y-axis or Z-axis gyroscope, a roll angle alignment method based on dual source information fusion is proposed to achieve the optimal rolling angle tracking results. The simulation and test results show that under the condition of carrier zero gravity, the proposed method can complete the alignment within 5 seconds without satellite assist and initial attitude, and the alignment accuracy is better than 3 degrees. This proposed method can adaptively eliminate the abnormal roll angle tracking results, and effectively improve the adaptability and reliability of inertial navigation system for high-speed rotating carrier in complex mechanical environment.