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Developing the MBSE Approach

This presentation discusses the use of the Model-Based Systems Engineering (MBSE) approach in railway system investment projects, including the GRIP stages and the various analyses and tools used in the process.

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Developing the MBSE Approach

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  1. Developing the MBSEApproach Tony Ramanathan Principal Engineer Network Rail

  2. Agenda The Railway System Investment Governance GRIP Asst Life Models / Analysis used Interface Management – why we need Modelling Modelling Tools Design Handbook inc the Building Blocks

  3. The people, The process applied, The systems used

  4. Project Governance - GRIP“Project Life-Cycle” Governance for Railway Investment Projects (GRIP) There are Eight GRIP Stages A RUS scheme is outside of Project Governance and is between 5 to 7 years prior to GRIP 1 Pre-GRIP

  5. Analyses Used in Systems Engineering

  6. Asset Life

  7. Interface Management - train infrastructure interfaces • OLE Contact • Traction Power • EMC • Customer Information Systems (CIS) • Lineside Infrastructure • Signalling & Telecoms • Passengers behaviour • Gauging Clearance • Kinematic Envelope (KE) • Train Detection • Track Conditions • Track Design/Quality • Drainage • Tonnage passing (load) • Platform Occupation/ Dwell Times • Platform Length/SDO • Stepping Distance • Station/ DDA Compliance • Wheel/ Rail Interface • Axle Load • Route availability (RA) / Allowable Speeds

  8. Modelling ToolsSystems Analysis Section number to go here

  9. Models often consider differing Time Horizons ICM Full UK TRAIL RailSys Route level Spatial Representation* CUI OSLO Scheme level SPA VTSIM Pedflow EMI Asset level Mins Hours Days Periods Years MultiYears Analysis Time Horizon * Spatial representation within a single model

  10. SA Approach towards Option Selection Option 2 Capability: Capacity Journey Times Power Reliability Maintenance Construction Whole life cost ? ? TIP Option Capability: Capacity Journey Times Power Reliability Maintenance Construction Whole life cost SPA Option 1 Capability: Capacity Journey Times Power Reliability Maintenance Construction Whole life cost RailSys OSLO TRAIL Legion LCC Preliminary Assessment Systems Capability Modelling Requirements & Option Validation: Ops & Perf. Engineering Eng Policy Feasibility Option 1 Capability: Capacity Journey Times Power Reliability Maintenance Construction Whole life cost Option Selection ‘Favoured Option’ Option X Capability: Capacity Journey Times Power Reliability Maintenance Construction Whole life cost Option X Capability: Capacity Journey Times Power Reliability Maintenance Construction Whole life cost ? ? ?

  11. Typical System Breakdown Structure (SBS)

  12. Timetable Infrastructure Rolling stock Operations TRAIL discrete event simulator Lateness Analysis Delay Analysis Infrastructure Performance Operations Performance PPM TRAIL (Transportation Reliability, Availability and Integrated Logistics)

  13. What about RailSys? • RailSys is used to provide the ‘operations tick in the box’ for any scheme • Provides a very powerful visualisation of a timetable • Can be used to identify detailed train path routeing and permits detailed event scenario modelling • It does not do PPM • Of note for engineers; the complexity within the model can vary (even if the model is compliant to NR Opns Build Ver6) • Simple models are normally optimistic • trains may exhibit movement behaviour which the driver / signaller might not be able to emulate in real life

  14. Existing Layout Proposed Layout Capacity Modelling Thameslink KO2 – The need for ATO Crossrail – Scheme Performance Assessment Reading – Capacity Utilisation Index ERTMS – Braking Curve

  15. SPA Process Presentation title to go here

  16. Key contacts Specialist within Network Rail Nigel Best – TRAIL, RAILSYS, RAM, FMECA Clare Waller – Timetable Maya Petkova – EMC Mark Burstow – Wheel / rail dynamics Caroline Lowe – Climate + Asset specialist Gauging Power Signalling Telecoms Level Crossings

  17. System Design Handbook Links work only in Presentation Mode Section 1 What is SE Section 2 Intro to SE Teams Section 6 Requirements Section 5 Building Blocks Section 3 GRIP, P Approval & Acceptance The people, The process applied, The systems used Section 4 System Integration

  18. PSE – Building Blocks (guidance)(Links work in Presentation Mode) Introduction to Building Blocks PSE Schemes Resource estimating Route Integration Generic Train Infrastructure Interface Specification + Presentation PRS user guide Application of Standard Designs Layout Development Workshops Main Line Stabling Sidings Equality Act 2002 (DDA) Freight Distribution Depots Undertaking a Pre Grip Evaluation Rail Maintenance Depots Light Rail + Presentation Terminal Stations Junction Evaluation +Presentation Line Speed & Journey Time Improvements + Presentation Consideration for Gradients / Curves + Presentation Introduction To Station Design

  19. Typical System Level Railway Functional Block Diagram (FBD)

  20. Cause & Effect Workshops: Engineering Maintenance Operations Design for Reliability TRAIL Model: Options Evaluation DESIGN for RELIABILITY Modify System Configuration Use alternative Asset types Control Key Processes Introduce Condition Monitoring Enhance Maintenance Improve Operational Plans System Diagrams FMS / TRUST Data Route FMECA (Tech. & Ops) Reliability Data Hdbk

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