As a continuation of the activity started by the project CLUG the main objective of CLUG 2.0 would be the definition of a system architecture which aims to complement the existing European Train Control System (ETCS) odometry system by using GNSS to enable absolute safe train positioning whilst also transforming today’s train localisation by demonstrating a GNSS based multi-sensor fusion architecture.
The CLUG 2.0 technical objectives which derive from this high-level objectives have been fixed based on the status of the work performed in CLUG the first project dedicated to demonstrating the feasibility of the multi-sensor approach for a safe localisation system for railway.
The table below summarizes main technical objectives and linked Key Performance Indicators (KPIs):

No. Technical Objective Expected Result
EO1 CLUG 2.0 will review, consolidate and complete the high-level user needs and system requirements for LOC-OB System including Start of Mission and Track Selectivity Definition of the user needs, operational context, initial assumptions, system boundary and requirements including:

  • Operational needs of IM and RU and system capabilities to be fulfilled by the LOC-OB system.
  • Operational scenarios including nominal and degraded scenarios with regards to Start of Mission and Track Selectivity.
  • System context, functions, and constrains of a LOC-OB system.
  • System requirements (functional and non-functional) including RAMS.
EO2 CLUG 2.0 will consolidate the safe localisation system architecture and prototype further the functions of the CLUG LOC-OB Based on the software prototyping made in CLUG and X2RAIL5, CLUG 2.0 will:

  • Review and consolidate the CLUG LOC-OB safe system architecture;
  • Develop fault detection and exclusion algorithms at different level of the system (GNSS, IMU, speed, balise reader, sensor fusion);
  • Develop the safe confidence intervals from the integrity concept;
  • Develop a prototype of the track selectivity algorithm.
EO3 CLUG 2.0 will consolidate by live demonstration the readiness of the CLUG LOC-OB multi-sensor fusion algorithms
  • CLUG 2.0 site demonstrator, in which the data fusion algorithms provided by WP4 can be demonstrated in real time
  • CLUG 2.0 site demonstrator installed onboard the above-mentioned test train
  • Fusion filter performance demonstrated in live with the CLUG 2.0 on-site demonstrator
EO4 CLUG 2.0 will perform a RAMS analysis on the consolidated functional architecture of the system
  • Provision of a RAMS plan detailing the planned RAMS activities.
  • Definition of RAMS requirements in line with the overall required safety level.
  • To demonstrate that the CLUG LOC-OB safe functional architecture complies to the RAMS requirements.