惯性导航系统可观测度研究  

Degree of Observability of Inertial Navigation System

作　　者：孙钰琛[1] 段凤阳[1] 

机构地区：[1]空军航空大学飞行器控制系,长春130022

出　　处：《舰船电子工程》2013年第3期40-42,55,共4页Ship Electronic Engineering

基　　金：武器装备重点预研基金资助项目(40405030403)

摘　　要：线性系统的可观测性是状态估计的基础,通过可观测性矩阵分析系统的可观测性只能得出系统是否完全可观测,而不能对每一个状态的可观测性进行衡量。对不完全可观测系统,为使每一个状态的可观测性有一个量度,人们提出了可观测度的概念。论文分析了三种常用的可观测度定义方法,指出了它们的不足和局限性,并用两种新的方法从根本上分析了惯性导航系统各误差状态的可观测度,最后进行了仿真实验,证明了分析的正确性。The observability of the linear system is the foundation of the state estimation.Only the system＇s observability can be known through the analysis of observable matrix,the observability of each state can＇t be measured.For the incomplete observation system,the concept of degree of observability is proposed to measure each state＇s observability.This paper analyzed three commonly used definitions of degree of observability,pointed out their deficiencies and limitations.Two new approaches are applied to analyze the degree of error states＇ observability of inertial navigation system,and finally the simulation proved its validity.

关 键 词：可观测度 特征值 奇异值 惯性导航系统 

分 类 号：U666.1[交通运输工程—船舶及航道工程]