双轴旋转惯导系统转位误差对导航精度影响研究

摘要

Aiming at the impact mechanism problem of rotation error of dual-axis rotary INS on navigation precision, on the basis of study of the nonlinear scale factor error effect of gyros, the coupling effect of rotation error and nonlinear scale factor error effect of gyros is analyzed, and the impact of the coupling effect on navigation precision is simulated. Studies show that,on the same the nonlinear scale factor error effect of gyros,rotation error will cause the accumulation and divergence of navigation longitude error, and the degree is approximately proportional to rotation error; on the same rotation error,navigation longitude error will increase with the increase of the nonlinear scale factor error effect of gyros.%针对双轴旋转惯导系统转位误差对导航精度的影响机理问题,在研究陀螺的非线性标度因数误差效应基础上,分析了转位误差与陀螺非线性标度因数误差的耦合作用,对耦合作用对导航精度的影响进行了仿真.研究表明:陀螺非线性标度因数误差不变时,转位误差会引起导航经度误差的积累和发散,积累和发散的程度与转位误差大小近似呈正比关系；转位误差不变时,导航经度误差会随陀螺非线性标度因数误差的增大而增大.