Using FMI (Functional Mock-up Interface) for MBSE at all steps of System Design

Using FMI (Functional Mock-up
Interface) for MBSE at all steps
of System Design
Realize innovation.Unrestricted © Siemens AG 2016
LMS Imagine.Lab Amesim™
A world leading platform for physical
simulation of mechatronic systems

Unrestricted © Siemens AG 2016
July 19, 2016Page 2 Siemens PLM Software
Table of content
• Overview of FMI in LMS Amesim
• Application: FMI 2.0 Co-simulation Master
• Application: FMU export assistant
• Application: Automatic table embedding in LMS Amesim FMUs
• Application: FMI 2.0 co-simulation slave
• Application: FMI for real-time
• The advantage of FMI
• Going further

Simcenter™ Portfolio for Predictive Engineering Analytics
LMS Imagine.Lab
LMS Imagine.Lab Amesim
Openness &
Scalability
Collaboration &
workflow
Co-Simulation

FMI / FMU in a nutshell
What is FMI?
• A tool-neutral standard to support
both model exchange and
co-simulation of dynamic models
82 tools currently support FMI, they belong to 8 categories:
0D-1D system simulation | Systems engineering | Multibody simulator | Controls and scientific computation tools | HiL
Hardware and Real-time targets | ECU software development tools | Co-simulation middleware | Integration platforms
https://www.fmi-standard.org/tools
What is FMU?
• A ZIP file used to package the model,
its resources and documentation
• An XML that describes the model
structure and capabilities

FMI Use Cases and Motivations
Use Cases to address:
• Collaborative MBSE:
• Between OEMs and suppliers
• Between departments of the same company
• Involving different domains and complexity levels
The solution is:
• Tool neutral software interface
• Open format, with publicly available specifications: https://www.fmi-standard.org/downloads
Many existing and future interfacing possibilities
Numerous suppliers…
1 OEM (system integrator)
1D, 3D FEA/MBS, CFD, Controls, RSM, Real-Time…

Summary: 4 ways of coupling LMS Amesim with other FMI compliant tools
Selecting an FMI importing tool
• Depends on preferred
environment for result analysis
• Depends on each tool’s FMI
capabilities (import / export,
co-simulation vs. model
exchange)
Choosing between Model
Exchange or Co-Simulation
• Performance / robustness
compromise
• Tool capabilities
To LMS Amesim (Import) From LMS Amesim (Export)
ModelExchangeCo-Simulation

LMS Amesim’s most frequent FMI companion tools in % - Customer cases
0
5
10
15
20
25
30
35
Dymola Adams SIMPACK SimulationX GT-Suite MapleSim Abaqus FMI toolbox
Dymola
Adams
SIMPACK
SimulationX
GT-Suite
MapleSim
Abaqus
FMI toolbox
Percentage
[%]

Worldwide customer references: FMUs exported from LMS Amesim
FMI mode Customer Master tool Country
FMI for
Co-simulation
Slave
Off-Highway OEM US
Automotive OEM US
Automotive OEM UK
Automotive Supplier DE
Aeronautic OEM FR
Automotive OEM DE
Automotive OEM DE
Automotive Supplier JPN
Off-Highway OEM DE/CH
Aeronautic OEM NL

Worldwide customer references: FMUs imported into LMS Amesim
FMI mode Customer Slave tool Country
FMI for
Co-simulation
Master
Off-Highway OEM US
Automotive OEM US
Aeronautic Supplier UK/FR
Aeronautic OEM UK/FR
Off-Highway OEM DE/CH
Automotive OEM JPN
Off-Highway Supplier FMI Toolbox for
MATLAB/Simulink
DE
Automotive OEM DE
Aeronautic OEM FR
Automotive OEM FR

Table of content
• Application: FMI 2.0 co-simulation Master
• Going further

Software interfaces
Application: FMI 2.0 Co-simulation master
Complies with the 2.0 version of the FMI standard Imported FMUs are seen as standard LMS Amesim submodels
LMS Amesim acts as a co-simulation master
FMI 2.0 co-simulation block
All FMUs transparently managed by the FMU Import Assistant
• Import Functional Mock-up Units (FMUs) for Co-simulation 2.0
into LMS Amesim
Master
Slave

Application: system-level analysis within LMS Amesim through FMI
Validate a complete vehicle by integrating and simulating together all
subsystems imported as FMUs for co-simulation 1.0 or 2.0
Benefit from all LMS Amesim analysis tools, take advantage of embedded
know-how with high detail physics and solvers, as well as IP protection
for your models

Table of content
• Going further

Application 1: complete braking system including control logic
exported as an LMS Imagine.Lab Amesim FMU
An LMS Amesim user creates hydraulic
circuit and ABS/ESC controllers
Using the new FMU Export Assistant, the LMS Amesim model is exported as an
FMU for Co-Simulation or Model Exchange with all the tables it needs
This FMU is then imported into complete vehicle master model made with LMS Virtual.Lab
Motion, SIMPACK, Adams or any FMI compliant 3D Multibody tool …
1D 3D/MBS CFD Control
X X X
ME Import ME Export Cosim Master Cosim Slave
X X
or
or
or
1.0
2
3
2.01.0
LMS Amesim
1

Application 2: 1D-3D coupling between LMS Imagine.Lab Amesim
and LMS Virtual.Lab Motion through FMI
An FMU of the hydraulic part of
a backhoe model is generated
with LMS Amesim
It is then imported into the
LMS Virtual.Lab Motion 3D model
of the backhoe’s digging arm
1
2
LMS Amesim
1.0
1D 3D/MBS CFD Control
X X
X

Application 3: export an LMS Amesim model without its solver into any FMI
1.0 compliant importing tool
Under Windows or Linux, an LMS Amesim user exports his model as a
1.0 FMU for model exchange, i.e. without the solver embedded. The FMU
is compiled for both the 32-bit and the 64-bit architectures and embeds
all the tables used by the model.
A user of a 3rd party FMI 1.0 compliant tool imports the FMU and selects a solver
suitable for solving both the 3rd party part of the coupled model and the LMS Amesim
part contained in the FMU
1D
(LMS Amesim)
Any 3rd
-party FMI tool CFD Control
X X
X
or
1
2
LMS Amesim
( )
1.0

Table of content
• Application: Automatic table embedding in LMS Amesim
FMUs
• Going further

Software interfaces
Automatic table embedding in LMS Amesim FMUs
• Tables used by LMS Amesim models automatically
embedded in exported FMUs
…for any FMU exportable by LMS Amesim
Query mode for tables of unrecognized types Detailed feedback on tables
Tables correctly
identified and detected
Tables not found at
specified paths
Expressions used to
replace tables
Start the FMU export assistant

Application: creating a complete and self-contained FMU from a powertrain
model with many tables
An LMS Amesim user creates a 6-gear automatic
transmission model using many tables coming from
experimental measurements
He exports this model as an FMU using the FMU export assistant.
All the tables are embedded in the binary. The FMU is then sent
to an Adams user as is, without any additional files
The Adams user runs the FMU directly on his machine knowing that it is complete and self-
contained. While embedded tables are silently used by default, updated versions of tables
declared as parameters can be provided if needed
or1.0 2.0
20+ model tables
LMS Amesim model
1 2
3

Table of content
• Going further

Software interfaces
FMI 2.0 co-simulation slave
• Export LMS Imagine.Lab Amesim models as 2.0 (slave)
FMUs for co-simulation
Set “Co-simulation 2.0” as FMU type and version and proceed 1. Export an LMS Amesim 2.0 FMU for co-simulation
2. Import it and run it in a 3rd party FMI 2.0 master tool
LMS Amesim

Application: landing gear model exported as 2.0 co-simulation FMU into
Adams 2015.1
An LMS Amesim user creates the hydraulic circuit model of
the landing gear
An Adams user runs the LMS Amesim FMU of the
hydraulic circuit in the 3D mechanism model of the
landing gear system within Adams
1
3
LMS Amesim
The LMS Amesim model is then exported as a 2.0 co-simulation
FMU using the FMU export assistant. FMU is compiled for 64-bit
which is the architecture of Adams 2015.1

Table of content
• Going further

FMI for real-time for a direct export to your targets
Generation of “source code FMUs” usable on recent RT targets
Hardware-in-the-Loop (HiL) and FMI

Application 1: direct export of a real-time capable hydraulic excavator model
on dSPACE SCALEXIO ®
Create and simplify the complete excavator model using the
powerful libraries and analysis tools of LMS Amesim
Compile and run the FMU using dSPACE ConfigurationDesk and use
the HMI of dSPACE ControlDesk to pilot it
Export it directly as a 2.0 “source
code FMU” for co-simulation,
specifically generated for
SCALEXIO
Simulink
+ Simulink Coder
FMI based RT
export
FMI based
RT export
1
2
3

Application 2: parallelized co-simulation of two
LMS Amesim 2.0 FMUs on dSPACE SCALEXIO ®
2.0 2.0

MiL: Offline co-simulation testing
using the Functional Mock-up Interface (FMI)
Offline testing
• Both 2.0 FMUs imported into LMS Amesim
• 3-way co-simulation: LMS Amesim as master
and the 2 FMUs as slaves
• Solver type and methods changeable
from the FMUs’ interface
• Previously defined fixed-step methods and
settings applied to the FMUs
• Co-simulation stable with a 1ms
co-simulation time step and faster than
real-time on a 2.7 GHz Intel® Core™ i7 CPU

HiL: Online co-simulation testing
on a multicore real-time target (dSPACE SCALEXIO®)
Online testing
• Both models exported as
2.0 “source code FMUs”
for co-simulation (with solvers)
• Both FMUs imported into
dSPACE ConfigurationDesk®
• FMUs are assembled, compiled
and co-simulated in parallel on the
dSPACE SCALEXIO® real-time target
• Sine with dwell maneuver executed
also for the online testing
• Online and offline results do match
• Turnaround times are as expected

FMI from MiL to HiL with LMS Amesim | main outcomes
• Demonstrated continuous model utilization
from MiL to HiL, taking an example of chassis
model coupled with ABS & ESC.
• Discussed about the technical constraint for
Real-time model (fixed time).
• Showcased the work flow and required tools
used to simplify models for Real-time
both in time and frequency domains:
Performance Analyzer, Activity Index, Modal
Projection Tool, Eigenvalue Animation…
• FMI 2.0 appears to be a reliable standard for
offline as well as online co-simulation testing
Next steps
 Driving simulator with driver inputs
 Human-in-the-loop

Table of content
• Going further

The FMI advantage
All connected through FMI
LMS Amesim

Table of content
• Going further

FMI examples and dedicated manual in the LMS Amesim online
documentation
LMS Amesim 15 online documentation
with ready-to-use examples & dedicated user manual to start with:
• Co-simulation & Model Exchange
• FMU Export and FMU Import
• Offline and Real-time

More about the LMS Imagine.Lab Amesim platform
LMS Imagine.Lab Amesim comes with unique usability and scalability capabilities with
all the LMS Amesim graphical user interfaces (GUI), interactive help and associated
features such as the supercomponent facility, batch run monitor, experiment manager,
postprocessed variables and Statechart designer.
LMS Amesim enables you to analyze your data and system results with advanced
plotting facilities, dashboard, animation, table editor, linear analysis, activity index and
replay
LMS Amesim helps improve your system design with LMS Amesim Design
Exploration, LMS Amesim Export module or the LMS Amesim-Optimus interface.
Use advanced LMS Amesim scripting tools for model interaction automation and LMS
Amesim APIs for full command-line building of complete models.
LMS Amesim enables you to tailor your platform to your specific needs with the App
designer, Plots Python API, application-specific tools for pre-processing and post-
processing as well as customized parameter editing using external executables.
Platform
facilities
Analysis
tools
Optimization, robustness, design
of experiments
LMS Amesim
simulator scripting
LMS Amesim
customization

More about the LMS Imagine.Lab Amesim platform
LMS Amesim integrates cutting-edge numerical methods, performance analyzer,
discrete partitioning library for CPU speed-up, a parallel processing feature for
multiprocessor task distribution as well as High Performance Computing (HPC).
The LMS Amesim unique integrated platform provides realistic plant models for every
stage of the development cycle, enabling system and control engineers to start
evaluation and validation phases early in the design cycle using model-in-the-loop
(MiL), software-in-the-loop (SiL) and hardware-in-the-loop (HiL) frameworks.
LMS Amesim provides co-simulation capabilities with any software coupled with LMS
Amesim due to the generic co-simulation capability and functional mock-up interface
(FMI), to complete heterogeneous simulations within an unique integration platform.
LMS Amesim can be coupled with external software applications such as CAE, CAD,
CAM, FEA/FEM and computational fluid dynamics (CFD). Co-simulation provides
coupling between LMS Amesim and CAE tools with predefined setups to ensure good
dialog between the tools and simulation software.
LMS Imagine.Lab Amesim supports Modelica, the open standard language for
describing physical systems. The Modelica platform provides the tools you need to
build acausal, multidomain Modelica models and leverage the LMS Amesim platform
features to analyze the resulting system.
Solvers
and numerics
MIL/SIL/HIL
and real-time
Software
interfaces
1D/3D
CAE
Modelica
platform

Contact
Bruno LOYER & Stéphane NEYRAT
LMS Amesim Platform
Siemens Industry Software S.A.S.
Digital Factory Division
Product Lifecycle Management
Simulation & Test Solutions
DF PL STS CAE 1D
siemens.com

Using FMI (Functional Mock-up Interface) for MBSE at all steps of System Design

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