Semi-analytical assessment of the relative accuracy of the GNSS/INS in railway track irregularity measurements
作者机构：GNSS Research CenterWuhan UniversityWuhanChina Collaborative Innovation Center of Geospatial TechnologyWuhan UniversityWuhanChina Artificial Intelligence InstituteWuhan UniversityWuhanChina.
出 版 物：《Satellite Navigation》 (卫星导航（英文）)
年 卷 期：2021年第2卷第1期
页 面：352-367页
核心收录：
学科分类：081802[工学-地球探测与信息技术] 08[工学] 081105[工学-导航、制导与控制] 0818[工学-地质资源与地质工程] 0804[工学-仪器科学与技术] 0811[工学-控制科学与工程]
基 金：the National Natural Science Foundation of China(41904019)
主 题：Inertial surveying Relative measurement accuracy Error propagation modeling Steady-state Kalman filter Precise engineering surveying
摘 要：An aided Inertial Navigation System(INS)is increasingly exploited in precise engineering surveying,such as railway track irregularity measurement,where a high relative measurement accuracy rather than absolute accuracy is ***,how to evaluate the relative measurement accuracy of the aided INS has rarely been *** address this problem with a semi-analytical method to analyze the relative measurement error propagation of the Global Navigation Satellite System(GNSS)and INS integrated system,specifically for the railway track irregularity measurement *** GNSS/INS integration in this application is simplified as a linear time-invariant stochastic system driven only by white Gaussian noise,and an analytical solution for the navigation errors in the Laplace domain is obtained by analyzing the resulting steady-state Kalman ***,a time series of the error is obtained through a subsequent Monte Carlo simulation based on the derived error propagation *** proposed analysis method is then validated through data simulation and field *** results indicate that a 1 mm accuracy in measuring the track irregularity is achievable for the GNSS/INS integrated ***,the influences of the dominant inertial sensor errors on the final measurement accuracy are analyzed quantitatively and discussed comprehensively.
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