单轴旋转对船用激光惯导系统定位误差的影响

摘要

The rotating modulation method was a auto-compensation method that can automatically compensate navigation system error, the error appeared because of the gyro' s and accelerometer' s bias, the compensation method was independent of external navigation communication. The rotating modulation method was already applied triumphantly. The effect of the gyro' s and accelerometer' s bias,fixing error and scale-factor error on the single-axial rotation was indicated. When the system was designed,the effect of all error complication on the rotary and non-rotary system position error was analyzed by computer simulation. The result of simulation show that the single-axial rotating modulation method can suppress the divergence of position error, and the rotary system can keep better attitude precision up compared with non-rotation system.%激光惯导旋转调制技术是一种自校正方法,其补偿手段是在不依赖外部导航信息的前提下,自动补偿陀螺漂移和加速度计零偏引起的系统导航误差.该旋转调制技术已经在国外舰船型号上成功应用,通过对陀螺和加速度计常值漂移、安装误差、标度因数误差等因素在单轴旋转下的调制情况进行了研究.系统设计中,通过计算机仿真分析了系统在旋转和非旋转情况下各误差因素对系统定位误差的影响.仿真表明,采用单轴旋转调制技术能够抑制长期的定位误差发散,在角运动状态下旋转系统能比无旋转系统保持更好的姿态精度.