1. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY System Models to Assess the Impact of Change The IEE Railway System Modelling – Not Just for Fun Seminar Thursday 30 th September 2004 Clive Roberts Lecturer in Railway Systems University of Birmingham c.roberts.20@bham.ac.uk www.eee.bham.ac.uk/robertc

2. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Background Rail Vehicle and Track System Integration Project is funded through the EPSRC Systems Integration Initiative A 3-year collaborative industry/academia research project (ending January 2005) Research split between University of Birmingham and Manchester Metropolitan University Multi-disciplinary team: Civil Engineers, Vehicle Dynamicists, Software Engineers, Metallurgists, Electrical Engineers

3. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Project Motivation Many problems span several engineering disciplines and can only be effectively tackled by understanding the system as a whole Systems engineering together with conceptual systems modelling allows problems to be investigated more effectively In particular the rail industry needs a means of investigating the effects of changes on the whole system, not just within individual subsystems or components

4. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Systems Engineering Process

5. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Project Work Packages Requirements Elicitation – to understand what is required System Modelling – to map the relationships and interconnections between components Compositional Modelling – to build new models from model fragments and infer knowledge TOOLS Database – to provide details of existing task specific tools and the links between them Decision Support System

6. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Requirements Elicitation Initial part of the Systems Engineering process Decomposition of the problem in order to further understanding Identify stakeholder and system level requirements Requirements modelling Understanding existing practices (cost modelling, wear modelling....)

7. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Scenarios Physical System Relationships

8. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Scenarios Model Identification (identification) –To provide the user with models/tools that may aid with a particular problem

9. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Scenarios Model Identification (data flow) –To provide a series of models/tools which when joined together may solve a particular problem

10. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Scenarios Document Database –To provide the user with information relating to all aspects of a particular component / process

11. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Scenarios Expert Identification –Provide details of experts in a particular field

12. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Forms the foundations of the decision support system knowledge base Hierarchical relationship model to show simple interactions between physical components (elements) Model elicited from domain experts Provides a means of communicating about the domain under consideration System Modelling

13. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY System Modelling

14. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY System Modelling

15. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Compositional Model The core of the decision support system engine Builds on the simple foundation of the hierarchical system relationship model Captures the systemic knowledge in an organised way System knowledge is represented in logical sets Software algorithms are linked to model fragments in order to compose a scenario model for a given scenario

16. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Compositional Model

17. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Compositional Modelling Terminology Decision Variables - elements that change the model depending on the decision that is made by the user Physical Properties- properties that relate to the physical arrangement of the model element Dependent Variables - elements that are only relevant when some interaction occurs in the relationship. They can form limiting parameters for behaviour i.e. if X>Y then Z.

18. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY

19. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Tools used in the Railway System Infrastructure Vehicle V - I Interaction Wheel W – R Interaction Rail Substructure Management Environment TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY TOOLS Database

20. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY VAMPIRE : Vehicle Dynamics Simulation Package VAMPIRE Introduction TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Description Inputs OutputsContact Comments

21. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY ToolsInputs/Outputs Materials data Rail Plan Vehicle data Traction Data Tractive Effort & Speed ADAMS GENSYS NUCARS SIMPACK VAMPIRE Route data Tools Database - Agreed Case Studies Traction power/traction control on RCF – c2 the MANCHESTER METROPOLITAN UNIVERSITY Vehicle parameters, Track description Track Forces ABAQUS ANSYS HyperMesh I-DEAS Pro/MECHANICA Medina nCode RCF Fatigue Analysis

22. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY ADAMS GENSYS NUCARS SIMPACK VAMPIRE Track Forces Rail Plan Traction Data Vehicle data Route data RCF the MANCHESTER METROPOLITAN UNIVERSITY ToolsInputs/Outputs REFRAIL Chalmers WLRM Tractive Effort & Speed Vehicle parameters, Track description Tools Database - Agreed Case Studies Traction power/traction control on RCF – c3

23. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Decision Support System A decision support system to aid railway stakeholders to make decisions regarding system changes is being developed At the core of the DSS sits a hierarchical system relationship model which is used to compose models for a given scenario The user interface will be able to answer questions such as: –What affect does x have on y –What affect does changing x have......

24. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Decision Support System

25. TRAINS – Railway Vehicle and TRACK System Integration the MANCHESTER METROPOLITAN UNIVERSITY Conclusions and Further Work The project aims to generate a reasoned framework based on Systems Engineering Models and Principles to help railway engineers identify the affects of changes on the railway systems A prototype decision support system is being developed incorporating system modelling, composition modelling and the tools database Further work will be undertaken in a follow-on project to build economics into the models