激光捷联惯导系统线振动基座下误差参数辨识仿真

Simulation of Laser Gyro SINS Error Identification under the Condition of Linear Vibration

本文对振动基座和静态基座下激光陀螺捷联惯导系统对准过程进行了仿真。主要对比了两种情况下激光陀螺漂移误差和加速度计偏置误差的收敛速度和收敛精度。结果表明,同静态二位置情况相比,振动环境下,系统可观测程度有明显改善,加速度计偏置收敛速度提高近一倍,陀螺漂移收敛速度也有提高,并且振动环境下的仿真更接近惯导系统工作状态,具有较强的实用价值。

A simulation is accomplished to study the identification of laser gyro strap-down inertial navigation system（ SINS） error under the condition of vibrating base and static base. The convergence speed and precision of laser gyro drift error and accelerometer bias error are compared. The results show that compared with x axis and y axis of static position,the observable degree of SINS is improved significantly in vibration environment,the convergence speed of accelerometer bias and laser gyro drift are also increased. The simulation in vibration environment is closer to the real work situation of SINS,which has strong practical value.