摘要
初始对准是惯性导航的关键技术之一,对准结果会直接影响系统的导航精度。针对光纤陀螺惯导系统,缩短对准时间、提高系统对准精度等技术难点,开展了高精度光纤惯导系统连续旋转对准技术研究,深入分析了常值陀螺漂移、随时间变化的陀螺漂移、陀螺标度因数常值误差、陀螺标度因数不对称误差、陀螺安装误差、陀螺随机游走等误差项对系统对准精度的影响,对比了现有旋转方案的优点与不足,提出了一种改进的单轴二位置旋转方案。试验结果表明,在采用该旋转方案的情况下,对准时间8min方位角对准精度可达到30″(1σ),具有重要的工程应用价值。
The initial alignment technology is one of the key technology of inertial navigation, and its precision will affect the navigation result. Studying of the initial alignment of rotation-modulation strapdown inertial navigation system in order to shorten the alignment time and improve alignment accuracy. Analyzing the errors of IMUs that impact the precision of navi- gation system, include the constant drift of gyro, the drift over time of gyro, the constant error of scale factor of gyro, the asymmetric error of scale factor of gyro, gyro misalignment, the random error of gyro and so on. Compare the advantages and disadvantages of the existing rotation scheme, proposed an improved single-axis rotation scheme second position. The result of experiment show that the heading error is less than 30＂ after 8min initial alignment experiments in the scheme, the scheme has great merits in engineering applications.
出处
《导航定位与授时》
2016年第2期1-6,共6页
Navigation Positioning and Timing
关键词
惯导系统
旋转调制
误差分析
旋转方案
Navigation system
Rotation modulation
Error analysis
Rotating scheme
