晶振误差对长航时高精度捷联惯性导航系统的影响  

The Influence of Clock Error on Long-time High-precision Strapdown Inertial Navigation Systems

作　　者：黄凤荣 郭兰申[1] 钱法 李杨[1] HUANG Feng-rong;GUO Lan-shen;QIAN Fa;LI Yang(Mechanical Engineering College,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学机械工程学院,天津300401

出　　处：《科学技术与工程》2019年第5期25-29,共5页Science Technology and Engineering

摘　　要：针对长航时高精度捷联惯性导航系统中时钟误差对系统导航精度影响问题,从惯性导航系统导航解算算法出发,研究了时钟晶振误差引起系统误差的机理。建立了时钟晶振误差传播特性的数学模型,确定了时钟晶振误差与系统误差的量化关系。对提出的数学模型进行了数字仿真和半实物仿真,实验结果表明,所给出的数学模型是正确的。研究结果对高精度系统设计具有重要的指导意义。Aims at the influence of clock error on system navigation accuracy in long-time high-precision strapdown inertial navigation systems, starting from the navigation algorithm of inertial navigation system, the mechanism of system error caused by clock crystal error is studied, and the mathematical model of the influence of clock crystal error on system is deduced. A quantitative relationship between clock crystal error and system error is established. The numerical simulation and semi-physical simulation were carried out on the proposed mathematical model. The experimental results show that the mathematical model presented is correct. The results have important guiding significance for high-precision system design.

关 键 词：惯性导航算法 数学模型 等效陀螺漂移 晶振误差 

分 类 号：P207.1[天文地球—测绘科学与技术]