摘要
针对频域内分析惯导误差比较繁琐的问题,在时域内结合惯导误差微分方程及误差协方差黎卡提方程,分析了双轴旋转调制对惯性测量组件系统性误差及随机性误差的调制机理。结合激光陀螺双轴旋转调制惯导的特点,采用仿真实验和实际实验相结合的方法对相关分析进行了验证。实验导航误差结果表明双轴旋转调制能够调制系统性误差的影响,但不能调制随机性误差的影响,该结论有助于指导高精度长航时惯导设计时惯性器件的选择。
Aiming at the cumbersome problem of analyzing the inertial navigation error in the frequency domain,the modulation mechanism of the systematic error and random error of the inertial measurement unit is analyzed based on the inertial differential equation and the error covariance Riccati equation in the time domain.Combined with the characteristics of the RLG dual-axis rotation modulation inertial navigation system,the simulation experiments and actual experiments are designed to verify the theory analysis.The experimental results show that the dual-axis rotational modulation can modulate the influence of systematic errors,but cannot modulate the influence of random errors.The conclusion could guide inertial devices’selection of long-endurance and high-accuracy dual-axis rotation modulation inertial navigation system.
作者
周金亮
ZHOU Jin-liang(Unit 43,No.92941Troops of PLA,Huludao 125001,China)
出处
《光学与光电技术》
2020年第3期100-104,110,共6页
Optics & Optoelectronic Technology
关键词
激光陀螺
双轴旋转调制
系统性误差
随机性误差
误差分析
ring laser gyroscope
dual-axis rotation modulation
systematic error
random error
error analysis
