Metrological standardisation for rail applications of satellite based localisation systems

Transcription

1 1. Introduction 2. System parts 3. Metrological values 4. Standardisation of metrology 5. Applications 6. Conclusion Metrological standardisation for rail applications of satellite based localisation systems Hansjörg Manz (TU Braunschweig), René Rütters (RWTH Aachen) EURO - ŽEL

2 1 Introduction GNSS for railway applications GNSS: advantages for safety relevant applications in transport More economical operation Increased capacity Accurate localisation Continuous localisation Less dependency on fixed localisation infrastructure. Generic approach for all domains of transport Certification of localisation unit necessary Measurement of localisation performance under conditions of application domain Metrological quality of measurement has to be investigated and standardised Slide 2

3 1 Introduction Metrological standardisation Quantities to be standardised: Velocity Direction Stand still detection Track/ lane/ waterway/ flight corridor selectivity Vehicle integrity supervision. Slide 3

4 2 System parts Localisation unit GNSS receiver GPS Galileo GLONASS Digital map Domain specific sensor Inertial sensor Wheel speed sensor Balise Radar Eddy current sensor Slide 4

5 3 Metrological values Detailed view to Quality Slide 5

6 4 Standardisation of metrology Certification of measurement Certification process necessary Standardised measurements have to be defined Test environment providing repeatable conditions required Standardisation process Cooperation of RWTH Aachen (IRT) and TU Braunschweig (iva) Development of universal principals Definition of test scenarios (rail gate, PTB test track) Slide 6

7 5 Applications in transportation Railways: Traditional localisation vs. satellite based localisation Today: Block based localisation with equipment at infrastructure and train Equipment at infrastructure: Is exposed to environment Defines a state of the art Causes compatibility problems Allows only discrete but no continuous localisation Satellite based localisation at trains Shall check train integrity Shall avoid infrastructural components Shall be produced in series Increases capacity Reduces costs Slide 7

8 5 Applications in transportation Railways: Certification process Slide 8

9 5 Applications in transportation Road: Today's vs. Future localisation Today: Lane changing and distance keeping by driver Manual steering Can lead to congestions Is based on single decisions Leads to fatigue Satellite based localisation for vehicles Increases capacity Gives a base for intermodal, innovative traffic management Shall enable precise, safety relevant localisation Requires high integrity and availability Slide 9

10 6 Applications in transportation: road Road: Certification process Slide 10

11 7 Conclusion Summary & Outlook Operational innovations Continuous train localisation Cost efficient operation No track side equipment Interoperability Social innovations Exact stop of trains at platform Reduction of closing time of level crossings Measurement units will be analysed in detail Base for measurements Base for certification Base for application Measurement process/ cycle shall be derived Dipl.-Ing. Hansjörg Manz Institute for Traffic Safety and Automation Engineering Technische Universität Braunschweig Langer Kamp Braunschweig Tel.: Fax: h.manz@tu-bs.de Slide 11 Hansjörg Manz Metrological standardisation for satellite rail applications