一种惯性器件常值误差对系统误差影响的分析方法

摘要

在平台式惯性导航系统中,陀螺仪和加速度计的常值误差是制约系统最终精度的重要因素之一.通过分?种r析在无阻尼惯性导航系统中,惯性器件对平台误差角、速度误差和定位误差的影响,给出了在初始对准后,因惯性器件常值误差引起的系统固有误差和这类固有误差随时间的变化规律.结果表明,除经度误差随时间有振荡发散现象外,其它误差均为周期振荡有界.利用给出的结论,在设计惯性导航系统时通过分析系统误差要求,对于选择惯性器件具有一定的借鉴意义.%In the Gimbaled INS ,constant error of gyroscope and machined accelerometers is one of the most important factor which restrict the system's precision. Analysis the influence of inertial platform、 peed diffuse and positioning error from inertial instrument in the Gimbaled INS, give the inherent error and its error rule after initial alignment. The result indicates that every error is oscillator unless longitudinal error. The result has important meaning in the inertial instrument choosing when design the Gimbaled INS.