DTM-Aided Adaptive EPF Navigation Application in Railways

Jin, Chengming; Cai, Baigen; Wang, Jian; Kealy, Allison

doi:10.3390/s18113860

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…However, the additional map information can not only be used to improve the localization accuracy. It can also be used to increase the availability and integrity of the localization system itself [12]- [14].…”

Section: A Map Typesmentioning

confidence: 99%

Generating Compact Geometric Track-Maps for Train Positioning Applications

Winter

Luthardt

Willert

et al. 2019

2019 IEEE Intelligent Vehicles Symposium (IV)

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In this paper, we present a method to generate compact geometric track-maps for train-borne localization applications. Therefore, we first give a brief overview on the purpose of track maps in train-positioning applications. It becomes apparent that there are hardly any adequate methods to generate suitable geometric track-maps. This is why we present a novel map generation procedure. It uses an optimization formulation to find the continuous sequence of track geometries that fits the available measurement data best. The optimization is initialized with the results from a localization filter [1] developed in our previous work. The localization filter also provides the required information for shape identification and measurement association. The presented approach will be evaluated on simulated data as well as on real measurements.

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Section: A Map Typesmentioning

confidence: 99%

Generating Compact Geometric Track-Maps for Train Positioning Applications

Winter

Luthardt

Willert

et al. 2019

2019 IEEE Intelligent Vehicles Symposium (IV)

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“…Therefore, it was reasonable to develop a system for the planning of a linear object GNSS measurement campaign to be implemented in motion, taking into account the terrain model and its coverage. According to the authors, it can be successfully used in navigation applications, e.g., when carrying out an inventory of railway routes [48]. Moreover, it allows DOP values to be determined in a more realistic and reliable manner than the widely available programs.…”

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confidence: 99%

Testing of Software for the Planning of a Linear Object GNSS Measurement Campaign under Simulated Conditions

et al. 2021

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The precision of a linear object measurement using satellite techniques is determined by the number and the relative position of the visible satellites by the receiver. The status of the visible constellation is described by the Dilution Of Precision (DOP). The obtained geometric coefficient values are dependent on many variables. When determining these values, field obstacles at the receiver location and satellite positions changing with time must be taken into account. Carrying out a series of surveys as part of a linear object Global Navigation Satellite System (GNSS) measurement campaign requires the optimisation problem to be solved. The manner of the inspection vehicle’s movement should be determined in such a way that the surveys are taken only within the pre-defined time frames and that the geometric coefficient values obtained at subsequent points of the route are as low as possible. The purpose of this article is to develop a software for the planning of a linear object GNSS measurement campaign to implemented in motion and taking into account the terrain model and its coverage. Additionally, it was determined how much the developed program improves DOP values on the planned route under simulated conditions. This software has no equivalent elsewhere in the world, as the current solutions for the planning of a GNSS measurement campaign, e.g., Trimble GNSS Planning, GNSS Mission Planning, or GPS Navigation Toolbox, allow the satellite constellation geometry to be analysed exclusively for specific coordinates and at a specific time. Analysis of the obtained simulation test results indicates that the campaign implementation in accordance with the pre-determined schedule significantly improves the quality of the recorded GNSS data. This is particularly noticeable when determining the position using the Global Positioning System (GPS) and GLObal NAvigation Satellite System (GLONASS) satellite constellations at the same time. During the tests conducted on the road along a three-kilometre-long route (tram loop) in Gdańsk Brzeźno, the average value of the obtained Position Dilution Of Precision (PDOP) decreased by 22.17% thanks to using the software to plan a linear object GNSS measurement campaign. The largest drop in the geometric coefficient values was noted for an area characterised by a very large number of field obstacles (trees with crowns and high buildings). Under these conditions, the PDOP value decreased by approx. 25%. In areas characterised by a small number of field obstacles (single trees in the vicinity of the track, clusters of trees and buildings located along the track), the changes in the PDOP were slightly smaller and amounted to several percent.

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DTM-Aided Adaptive EPF Navigation Application in Railways

Cited by 2 publications

References 26 publications

Generating Compact Geometric Track-Maps for Train Positioning Applications

Generating Compact Geometric Track-Maps for Train Positioning Applications

Testing of Software for the Planning of a Linear Object GNSS Measurement Campaign under Simulated Conditions

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