ARMA模型在光纤陀螺惯导系统寻北中的应用

摘要

The optical fiber gyro random drift is the important factor of influence aiming accuracy in the north seeker of the inertial navi gation system. A third-order model is established and an algorithm is given to achieve high-precision of output. The on-line modeling is real ized and the strong tracking filter is used to achieve the Real-time filtering. By the north seeker test, the north seeker accuracy has been sig-nificantly improved. It is feasibility and practicality for the engineering practicality.%在光纤陀螺捷联惯导系统寻北过程中,光纤陀螺的随机漂移是影响其精度的重要因素.论文提出了一种建立三阶自回归模型AR(3)方法,实现了高精度FOG捷联惯导系统静态输出信号的在线建模,并采用强跟踪卡尔曼滤波技术进行误差的实时滤波.寻北试验结果表明,寻北精度有了明显的提高,从而验证了方法的可行性,具有工程实用性.