ENERGY OPTIMISED DRIVING STYLE MANAGEMENT USING A SATELLITE-BASED TRAIN POSITIONING PLATFORM

Abstract

Technical innovations are opening up more and more new opportunities for European rail transport improvement. Based on the Global Positioning System (GPS), the train positioning system OPTIVIA developed by DaimlerChrysler Rail Systems (Signal) GmbH, Germany, combines data from a variety of sources and provides accurate and reliable position data that can be used to optimize the transport process without a cost intensive infrastructure. This paper presents the principles and the performance of the GPS-based train positioning system. The system uses data collected from the GPS receiver, odometer, and route database to achieve required positioning accuracy and availability. Although the sensors used have both strength and weaknesses, by combining the complementary strengths of the sensors, the train positioning system is able to determine accurate and reliable speed and position data. For example, odometer data can be calibrated from the available accurate GPS positioning data. Conversely, the calibrated odometer data can provide reliable positioning when GPS positioning is not available during signal shadowing phases. With the integrated positioning data, the actual track related data (ramp, curve, speed limit, stopping point, and tunnel) can be extracted from the route database. As a useful application for a satellite-based train positioning system, the energy optimized driving style manager is presented. Depending on track condition, load situation, and timetable, energy can be optimized by controlling tractive force, regenerative braking, and energy storage. The system is scheduled to be tested on the Adtranz ICN (Swiss intercity tilting train) in 2000.