基于单轴连续旋转调制的方位对准技术  

Research on Azimuth Alignment Technology Based on the Single Axis Continuous Rotation Modulation

作　　者：赵晓伟[1] 李江[2] 党宁[2] 白焕旭[1] 邓志宝[1] 

机构地区：[1]北京航天发射技术研究所,北京100076 [2]中国兵器工业集团202研究所,西安712000

出　　处：《导弹与航天运载技术》2016年第1期26-30,44,共6页Missiles and Space Vehicles

摘　　要：捷联惯组冷态启动、环境温度变化、长时间未标定都可能使陀螺常值漂移发生变化,进而影响捷联惯组的方位对准精度。为减小陀螺常值漂移对方位对准精度的影响,进行基于单轴连续旋转调制的方位对准技术研究。通过理论分析可知,转台单轴连续旋转条件下,将陀螺常值漂移周期性调制,陀螺常值漂移对方位对准精度影响较小,转台转速越高,对准时间越长,方位对准收敛振荡幅值越小,收敛速度越快。通过算法仿真和试验验证了理论分析的正确性。The gyro constant drift was changed by the strapdown inertial measure unit（SIMU）cold start, the change of environmental temperature and uncalibrated for a long time which would also effected the azimuth alignment precision of SIMU. In order to reduce the influence of gyro constant drift to the azimuth alignment precision, the azimuth alignment technology based on the single axis continuous rotation modulation was researched. According to the theory analysis, the gyro constant drift can be periodic modulated under the condition of continuous rotation, so the accuracy of azimuth alignment will be less affected by the gyro constant drift. The higher the rotate speed of turntable was, the longer the alignment time would be, the azimuth alignment convergence oscillation amplitude was smaller and the rate of convergence was faster. The correctness of theoretical analysis was verified through the results of algorithm simulation and test.

关 键 词：单轴连续旋转 方位对准 陀螺常值漂移 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]