The Vehicle Dynamics Library (VDL) is a flexible tool for designing and analyzing vehicle components since 2004, offering benefits such as open code and scalability for user-defined applications. Key capabilities include multi-domain integration and real-time simulation, supporting applications in drivability challenges and control system development. The library consists of extensive model components for chassis, powertrain, and tire dynamics, ensuring compatibility with Modelon’s other libraries and facilitating innovative vehicle design.

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VEHICLE
DYNAMICS
LIBRARY
Overview

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 About Vehicle Dynamics Library
 Key Benefits
 Key Capabilities
 Key Applications
 Library Contents
 Modelon Compatibility
 Latest Release: 2018.1
AGENDA

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ABOUT VEHICLE DYNAMICS LIBRARY

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An environment for the design and analysis of vehicles and vehicular
components
On the market since 2004
ABOUT

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KEY BENEFITS

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• Open code
• View, extend, and modify models
• Provides many advantages of an in-house tool
• Scalable
• Users can work at either the component or system level
• Allows experts to focus on their expertise
• Fits anywhere in the tool chain
• Flexible
• No limit to different configurations
• Design and evaluate innovative & non-traditional concepts
KEY BENEFITS

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KEY CAPABILITIES

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• Multi-Domain
• Better understanding of complete vehicle behavior
• Provides direct interface to ECU design toolchain
• Easy to integrate electrical, hydraulic, and pneumatic components
• Deployable
• Distribution of models and analysis across entire organization
• Allows use of models in other environments (SIL, HIL, DIL, …)
• Safely share models with suppliers
• Interface models with external solvers
KEY CAPABILITIES

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KEY APPLICATIONS

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CHASSIS TUNING
Components: tuners and tunables
OEMs
Automates ride height adjustment
Motorsports
Replicate physical setup procedure such as
shim adjustments, driver in/out, fuel, ballast…
Provide setup tools to aid in physical setup

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REAL TIME
SIMULATION
Use VDL models for driving simulators and
HIL testing
Behavioral chassis models
(tabular, polynomial)
Useful for HIL testing where
chassis needs to be simulated
on a single processor core
Using parallel execution, also
elasto-kinematic multibody
models can be simulated in real
time with multiple processor
cores
Established workflows for
several real-time environments

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PLANT MODELS FOR
CONTROLS
DEVELOPMENT
Export vehicle models for use in developing
control systems
Scalable fidelity allows fast execution
Interface can be tailored to the specific
application
Flexible deployment using FMI

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DRIVABILITY
Challenge
To meet increasingly stringent fuel economy and
emissions standards without compromising
customers demands for vehicle performance
Issues
• Shift performance and feel due to increased
number of vehicle shifts to optimize fuel economy
• Vehicle launch induced vibrations with both
conventional and start-stop technology
• Driveline vibrations associated with dual clutch
transmissions and driveline vibrations

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Configurable model architectures in VDL make it straightforward to switch context to focus on
powertrain
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USE CASE: DRIVABILITY
Full Vehicle Template Drivability Template

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Common interfaces make it easy to switch between transmission models of varying complexity:
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USE CASE: DRIVABILITY
Dual Clutch TransmissionVDL Automatic Transmission

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USE CASE: DRIVABILITY
Wide-open throttle launch from idle
• Tabular engine
• Tabular chassis
• Standard automatic transmission
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PRODUCT CONTENTS

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CHASSIS AND SUSPENSIONS
Basic 3D models Parametric multibody CAD data, flexible partsBehavioral K&C
SA LM Poly

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Contains all the Components necessary for detailed analysis of suspension and steering systems
• Extensive library of suspension components
• Ride elements (springs/dampers/stabilizer bars)
• Steering systems
• Over 30 different suspension topologies
• Varying level of detail: planar, tabular, multibody
• Kinematic and compliant (lumped/bushings)
• Switchable attachments/mounts means 100s of configurations
SUSPENSIONS

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Contains components and assembled subsystems to model various driveline implementations: front-, rear-, all-wheel
drive
• Targeted to the development of vehicle drivelines
• 3D effects in joints, shafts and gears
• Geometry and kinematic effects
• Reaction torques and forces
• Bridges the gap to very detailed subsystem models
POWERTRAIN - DRIVELINES
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• Pure torque map: torque as a function of throttle and engine speed
• Applications: vehicle handling, drivability
• Pressure map (cycle resolved): cylinder pressure as a function of crank angle, throttle, engine control settings, and
engine speed
• Applications: engine, powertrain and driveline vibrations; and drivability
• More detailed (Engine Dynamics Library) engine models can be used to study gas exchange and mean value torque
production
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POWERTRAIN - ENGINES

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• Native tire models
• Pacejka ‘94
• Pacejka ‘02
• Pacejka ‘12
• Bakker ‘89
• GSTBakker ‘87
• Rill ‘05
• Linear
• 3rd party interfaces
• Delft Tire: MF-Tyre, MF-Swift
• FTire
• User extensible
• Modelica
• External code (.dll)
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TIRES/ROADS

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OpenCRG
Roads
Contact Models
TIRES/ROADS
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• Tire contact routines
• Single point contact
• Geometric/Enveloping
• 3D Road Builder
• Closed loop/circuit from centerline
• ISO3888-2 double lane change
• NHTSA Fishhook
• NHTSA J-turn
• Support for OpenCRG roads
• User extensible
• Contact filtering
• Ground lookup routines
3D Road Builder

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MODELON COMPATIBILITY

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• Vehicle Dynamic Library integrates with the Modelon Library Suite
• Electrification Library
• Electric drivelines, effects on vehicle dynamics
• Hydraulics Library
• Detailed hydraulic dampers
• Hydraulic brake systems
• Pneumatics Library
• Air springs
• Pneumatic brake systems
RECOMMENDED MODELON LIBRARY
COMPATIBILITY

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LATEST RELEASE: 2019.2

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RELEASE:2019.2
New Features
• Vehicle-level truck examples (including powertrains and brakes)
• New truck chassis-level experiments
• Twelve speed gearbox, lumped characteristic brake system for trucks
• K&C analysis and tabular models for axle suspensions
• New DataAccess-enabled tabular suspensions
• Reduced number dxf-files to reduce installation disk usage
• Circuit functions in ground interface
• New suspension templates with bump-stops
Enhancements