捷联惯导系统误差特点分析

对捷联惯导系统的误差源进行了深入分析,结果表明当陀螺仪刻度系数误差较大时,捷联惯导系统定位误差闭合现象较明显,即飞机返场时,误差有明显减小的现象;分析了舒拉调谐周期对惯导系统位置误差的影响并进行仿真,仿真结果验证了舒拉调谐对误差的调制作用,即在舒拉周期振荡分量的影响下,惯导系统的累积误差在某段时间内存在误差减小现象。

Error characteristic analysis of strapdown inertial navigation system

The source of errors of the strapdown inertial navigation system is analyzed.It shows that the phenomena of closed position error becomes obviously with the increase of the scale coefficient error of the gyro.That is to say,when the plane comes back to airdrome,the error reduces obviously.The effect of Schuler tuned cycle on position error is analyzed and simulated.The result proves that Schuler tuned cycle modulates the error and the accumulating error of the inertial navigation system reduces in some time under the influence of Schuler cycle.