【摘要】 舒勒周期振荡和傅科周期振荡会影响捷联惯性航姿系统的精度。本文将传统的平台内阻尼的思想引入到捷联惯性航姿系统中,通过设计水平回路中的三阶内阻尼网路,利用系统本身的速度信息来阻尼周期振荡。由于改变了舒拉调整条件,内阻尼算法只有在系统加速度较小的情况下才能使用。文中根据模糊理论对三轴加速度计的输出分析系统运动状态,判别是否能够使用内阻尼网路。仿真和实验证明,模糊内阻尼算法明显抑制了舒勒周期振荡和傅科周期振荡,有效提高了捷联惯性航姿系统精度。更多还原

【Abstract】 Schuler and Foucault cycle oscillations have some errors to strapdown attitude heading reference system (AHRS). Drawed into the idea of the damped algorithm of inertial navigation system (INS), this paper designs a three-order level damped net in the level loops of strapdown AHRS and uses the velocities to obstruct the oscillations. The system acceleration must be small enough, then the damped algorithm can be applied. The fuzzy theory is used to analyze the three accelerometer outputs to estimate the system movement station, and to distinguish whether the damped algorithm can be used. Simulations and experimental results prove that the fuzzy damped algorithm can control Schuler and Foucault oscillations, and improve the precision of the strapdown AHRS.更多还原