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Research on Information Quality of GPS for Advanced Public Transportation Systems

Author: MaFang
Tutor: YangXiaoGuang
School: Tongji University
Course: Traffic Information Engineering \u0026 Control
Keywords: Intelligent transportation system GPS Data Fusion Kalman filter Map matching
CLC: U495
Type: Master's thesis
Year: 2008
Downloads: 335
Quote: 7
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Abstract


Intelligent transportation system is an important research content of the intelligent transportation system . GPS technology to improve public transportation command and dispatch system and information service is an important means to improve the level of transit service , is one of the main research areas of intelligent transportation systems . This thesis to explore the application of GPS technology in intelligent transportation system , the system analyzes the information needs of the bus positioning system , information on the properties and quality of the information requirements , a comprehensive analysis of the GPS information in the collection , processing , transmission and application of the four areas possible errors , suggest improvements for error method . Credibility value , fuzzy evaluation algorithm used for the state of the real-time location of the positioning system to make scientific and rational evaluation of the quality of information on the practical application of GPS to improve the technology to provide a scientific basis and data support for the after part of the quality of the information . Kalman filter for GPS information to improve the quality of the GPS information , data pre-processing and information integration , and handling static , dynamic positioning data of the Kalman filter model parameter selection method . Kalman filtering to remove noise data in the raw GPS data and unreasonable data to provide a reliable data base map for the next match . Matlab simulation results show that the accuracy of GPS positioning data fusion algorithm is much better than GPS initial positioning accuracy . Registration to correct the public transportation vehicle positioning data through data fusion , the use of electronic maps , geographic data map matching GPS positioning to coordinate information and electronic map display error caused by the road information , and finally , through the experimental performance of map-matching algorithm verified .

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CLC: > Transportation > Road transport > Technical management of traffic engineering and road transport > Computer applications in road transport and highway projects
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