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Agile Model Based Systems Engineering

Authors:
Markus Pfeil at University of Applied Sciences Ravensburg-Weingarten
Markus Pfeil
Ralf Frotscher at TWT GmbH Science & Innovation
Ralf Frotscher
  • TWT GmbH Science & Innovation
Victor Faessler at TWT
Victor Faessler
  • TWT
S. Staudacher
S. Staudacher
S. Staudacher
  • This person is not on ResearchGate, or hasn't claimed this research yet.
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Abstract and Figures

Regardless of which domain we consider in this modern world, its respective products grow ever more complex. More complex customer demands and increasing interconnection between digital and physical aspects of product, production and user lead to highly sophisticated systems, made up of a vast number of small pieces of clever engineering and information technology. How can this complexity be managed? Is there an approach equally valid for domains like automotive, civil engineering, aeronautics and space? Is there a “rocket science “? And furthermore, how can such systems be designed efficiently? Such systems are made up of a number of smaller systems, which are supplied by different companies and designed by different people. Can system integrators and suppliers work together efficiently, even in the early stages of development? We will address these questions in a talk on modern Systems Engineering, which provides methods and processes for safe and secure design and testing of complex systems. We will touch on important modern aspects, such as model based systems engineering and model based validation as well as agile methods within systems engineering. As use cases we will present snapshots from an agile systems engineering approach to both automated driving and real drive emission testing. A further key feature shown is the variable complexity of simulations in such an approach, which can help the designer to evaluate e.g. basic geometric and stiffness properties with low complexity, fast simulations as well as enable the engineer to validate specific system properties using high fidelity FE, CFD or electrical simulations for example. All simulations feed the testing for requirement compliance with automated tracing of simulation results and parameters. A discussion of the relevant standards and formats will also be presented. In the first case a fully model based process is used to adapt to a change in a restrictive system requirement. Using a discussion based on a functional mockup setup, the effects of the change to the system will be shown. Automated testing using the virtual system shows conflicts and the specification and constructed system are kept synchronized. Based on a standard based toolchain the automated construction of the simulation architecture from formalized requirements and intermediate functional models enables this agile process. In a second example the evaluation of the vehicles real drive emissions is used to make a case for environmental modelling as part of the agile process, as the predicted emissions depend strongly on the exact and available scenarios for testing.
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NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Agile Model Based
Systems Engineering
Dr. M. Pfeil, Dr. R. Frotscher,
Dr. S. Staudacher, Dr. M. Ditze,
Dr. K. Kufieta, Dr. C. König,
Dr. V. Fäßler
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 2
Management Summary
9Years Technisch-Wissenschaftlicher Transfer
9Experts
9Research Projects
9Perspectives
Management Board
Dr. Dimitris Vartziotis
Joachim Laicher
Frank Beutenmüller
Dr. Victor Fäßler
30
300
20
3
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 3
Competences
Processes
Methods
IT
Engineering
Systems
Engineering
FEM
CFD
Multiphase Flow Simulation
Structural Analysis
Geometric und Functional
MBS
Optimization
Visualization
Aerodynamics
Computation and Simulation
Thermodynamics
Acoustics Vibration
FDM
PDM
Software Development
Implementation
Connectivity
Specification
Interfaces
Architecture
Development
Algorithmic
Context
System
Complexity
Data Bases
Analyses
Efficient Processes
Holistic
Weight Management
Concepts
Training Courses
Implementation
Consulting
Interdisciplinary
IT Development
Automation
HV Systems
Co-Simulation
Connected Vehicle
Battery Modelling
FMTC
FMI
Requirements Management
Electronics
Modelisar
Embedded Systems
Assistance Systems
Functional Safety
Simulation Data Analysis
ISO 26262
Big Data
Ice Detection
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 4
Managing Complexity
Model Based Systems Engineering
Communication
Predictive
Maintenance
Services
Design
Energy Management
Fleet
System
Complexity
Autonomous Driving
Data Management
Control Units
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 5
The Change to Agility
Value added for daily work
Mail Dashboard
Text Model Isolated Linked
Data /
Tools
Communi-
cation
Specifi-
cation
MBSE
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 6
The Implementation
SPES as the Modeling Framework
MBSE
Viewpoint
low
high
Requirements Functional Logical Technical
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 7 Secure
Process
Tom
Function Developer
Division Warning Light
User Journey
for a Demand Sequence
Create
Michael
System Supervisor
Division PostCrash
MBSE
platform
OSLC connection
Sarah
Demand Manager
Telematics
RTC
Demand
Management RTC
Demand
Management
RTC
Demand
Management
DNG
MBSE frontend
RTC
Simulink
DNG
DM
Mario
Function Developer
Division Outside Light
Assign
Rhapsody
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 8
Full
System
Level
Module
Level
Component
Level
Requirements
Detailed Design /
Specification
Architectural Design
Continous Product Development Process
An Agile V-Model
Specification Integration
and Testing
Implementation
Integration Testing
System Testing
Function Modelling
Acceptance Testing
Unit Testing
Virtual Integration and
Simulation
Model Based Systems
Enginering (MBSE)
Systems Engineering -
Methods, Tools & Processes
MBSE with SysML
Continous Requirements
Management Virtual Testing
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 9
Continous Product Development Process
Formalized Requirements
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 10
Continuous Development
Responsibility
Department B / Tool 2
Department A / Tool 1
Supplier model / Tool 3
Integration tool / Tool 3
Integration environment, providing also e.g. driver, track, driving scenarios
Powertrain
Wheel suspensions
Operational
strategy
Tires
Wheel suspensions
Tires
Engine
Single point of truth
CoC responsible for all aspects
of component development
No re-modelling of
‚Department-A-components‘ in
Department B
Integration of (final) supplier
components
Tool-independence -> re-use of
outer world designs FMU
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 11
Route Analysis
Routing
Tools for Simulation Based Routing
Map Kernel Toolbox
Map
Curves

Traffic
Topography
Signs
Graph Module
Performance
Energy
Restrictions
Drivingprofile
Simulation
Models
Weather
Vehicle
Driver
5,5t
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 12
Simulation (Emission) Informed Routing
VERIS
RDE / PEMS
Requirements
Preset Start- &
Waypoints
Traffic / Time
Extensive
Visualisisation
Export for Navi or
Simulation
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 13
Toolchain
intoCPS
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 14
Holistic Tool Integration
Co-Simulation
NAFEMS World Congress 2017 | 11-14 June | Stockholm | Sweden
Confidential
Seite 15
Summary
Agility in MBSE through high level of automation and flexible tool integration (FMI, Co-Simulation)
Semantically clean requirements lead to direct incorporation into the architecture design and to
Direct and automated traceability (OSLC)
From Optimisation and Design Space Exploration in the early development phase to
validation and performance tuning in later phases through tool independent interfaces for
Full integration of supplier models.
Toolchain is open for users and tool vendors (http://projects.au.dk/into-cps/)
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  • Dec 2017
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... An ontology identifies and defines the concepts and terms[6]. It also provides descriptions of the concepts and defines their relationships[7]. An ontology provides better definitions for the usage than a dictionary or taxonomy[1], which means an ontology is not just a classification method. ...
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