摘要
为了提高船用惯性导航系统(SINS)的动态精度,研究了方位回路标度因数的动基座估计。方位回路的标度因数是惯导系统的重要参数之一,目前的方案以方位角速率信息作为观测量,解算出方位回路标度因数,由于方位角速率信息在动基座上很难精确测量,因此,这种方法只适用于在实验室或干船坞等固定基座上进行。为了实现动基座上的方位回路标度因数的估计,以外测精确位置信息作为观测量,采用卡尔曼滤波原理估计不同方案编排下的等效方位陀螺漂移,解算出方位回路标度因数。理论分析和仿真结果表明,该方法的解算精度比陀螺漂移的稳定性约高一个数量级,能够满足系统的使用需求,同时也减少了舰艇的进坞次数,节省了维修保障成本,提高了经济效益。最后,从工程应用上对该方案进行了分析说明,为在实际系统上的应用提供了重要的参考依据。
To improve the dynamistic precision of Ship＇s Inertial Navigation System（SINS）, an estimation scheme of azimuth loop scale factor on moving base was proposed. The azimuth loop scale factor is one of the key parameters for INS. The azimuth angel speed information is used to estimate azimuth loop scale factor in classic method, and it is difficult to accurately measure the azimuth angel speed on moving base, so this method is used only on fixed base. Aiming at this problem, the accurate position information provided by other navigator is used to estimate the azimuth loop scale factor, and this method can also be used on moving base. The theory analysis and simulation results show that the estimation precision of the azimuth loop scale factor is about 10 times higher than that azimuth gyro drift stability. This method can reduce the repair cost. In the end, several explains on engineering application is given, which can provide reference for INS design.
出处
《中国惯性技术学报》
EI
CSCD
2008年第5期518-522,共5页
Journal of Chinese Inertial Technology
基金
海装"十一五"预研项目(1010506010101)
