惯导系统初始对准自适应参数选取法研究

平台式惯导系统的初始对准，为进入导航状态提供必要的初始条件，主要的性能指标是对准精度和时间。本文提出了一种新的变频带对准法的三阶调平系统，在对准过程中，系统的带宽能适应调平过程中信噪比的变化，从而使性能达到最优，经理论分析和仿真研究表明，这种新方法比经典方法，调平速度快而且提高了水平陀螺测漂及方位角的估值的精度。

A Variable Frequency Band Initialization Method in INS

It is necessary to do initialization before navigation for Inertial platform system. The properties of INS initialization have mainly time and precision.Our design differs from traditional method in that we consider variable frequency band.The fact is,as time passes,signal to noise ratio attenuates,and damping needs to be adjusted to narrow frequency band width so as to counteract the said attenuation.it makes it possible to lower initialization and improve the measurement of drift.simulation are done for both traditional 3-order leveling system and our 3-order variable frequency band one.The results indicate that,under the same condition,our new system possesses the following advantages:fast leveling or low initialization time;improved measurement of drift of level gyro;better estimate of azimuth angle.