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, 2016 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)

Mo

del

Exch

an

ge

C

o-S

imu

lati

on



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

2.0 1.0

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

or 1.0 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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