基于Simulink的捷联惯导系统圆锥误差的仿真研究

Simulation on Coning Errors of SINS Based on Simulink

基于Simulink仿真环境建立了捷联惯导系统三轴转台的仿真模型,模拟转台的角振动产生圆锥运动。通过设置陀螺的动态误差系数,对陀螺的动态测量误差产生的圆锥误差进行了仿真研究。分析了陀螺的标度因数误差和交联耦合误差产生的两类圆锥误差:整流误差和伪圆锥误差。提出了根据圆锥误差估计并补偿陀螺的动态误差系数的方法。仿真结果表明经过补偿后,由圆锥误差引起的姿态漂移得到明显改善。

The Simulink was used on modeling the three axis turntable for SINS testing. The coning motion caused by angular oscillations of the turntable was simulated. By modifying the dynamic error parameters of gyros, the coning errors including rectification errors and pseudo-coning errors, caused by the measurement errors of gyros in the coning motion were simulated. From the coning errors, the scaling errors and coupled errors of gyros were estimated and compensated. The simulating results infer that the compensation reduces the coning errors.