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Automotive Simulation Models (ASM)

Real-Time models for vehicle development

ASM is a tool suite for simulating combustion engines, vehicle dynamics, electric components, and the traffic environment. The open Simulink models are used for model-based function development and in ECU tests on a hardware-in-the-loop (HIL) simulator.

  • A Moving Variety

    For commercial vehicles, diversity is a standard. Scania has a nearly endless selection of vehicle types and modular vehicle configurations. And the generic electronic control unit (ECU) system has just as many variants. In a new test lab, Scania shows how this system can be validated with reliability.

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  • Aiming High

    Mazda is pursuing two main goals for its automobiles: an enjoyable driving experience on the one hand, and outstandingly low fuel consumption and emission levels on the other. By 2015, the company plans to reduce consumption by 30 % compared with 2008. So Mazda launched the SKYACTIV program, designed to optimize all the components necessary for reaching these goals. dSPACE Simulators and the Automotive Simulation Models are playing a major role in this.

  • Eyes on the Road

    Powerful tool chain for validating driver assistance systems
    Well-coordinated tools for simulation, testing and visualization are indispensable in validating modern driver assistance systems. Developers need a quick, easy way to model the properties of the vehicle under test, as well as road networks, traffic and electronic control units (ECUs), and to visualize driving maneuvers realistically. Together, the Automotive Simulation Models (ASM), ModelDesk and MotionDesk from dSPACE form a perfectly coordinated tool chain for this task.

  • Virtual Winter Tests

    No modern vehicle ever reaches the market without first undergoing exhaustive tests. And test vehicles alone are no longer enough to test the complex electronic control units. This job is performed by simulation models, which shift ECU development into the virtual reality of a virtual vehicle. Dr. Hagen Haupt, head of dSPACE’s Modeling Group, explains how the dSPACE simulation models are meeting this challenge.

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  • Efficient Vehicle Dynamics Development via Simulation-Based Prognosis Tools

    This paper presents a method for designing and tuning suspensions purposefully and quickly with the help of vehicle dynamics simulation. The method is based on the Automotive Simulation Models (ASM) from dSPACE, which have been extended for this use case. The ASM support design engineers through all phases, from creating a virtual prototype up to close-to-production fine tuning during the test phase. The paper specifically describes the necessary characteristics of the vehicle dynamics model, which go beyond those of a typical handling model. At Daimler AG, the ASM accompany the development during test drives, both for the pure vehicle dynamics design of the vehicle and for coupling the vehicle dynamics control systems to hardware-in-the-loop (HIL) systems. 

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Application Area: Combustion Engines
The ASM engine models are ideal for developing and testing engine ECUs and exhaust gas aftertreatment ECUs. They simulate a combustion engine, including all the necessary components, as a controlled system for the ECUs. There are models for diesel and gasoline engines with different injection systems and exhaust gas aftertreatment systems. The real-time simulations can be performed with mean value models or with physical models.
Application Area: Vehicle Dynamics
The ASM vehicle dynamics models provide an excellent basis for developing and testing vehicle dynamics ECUs, such as ESP, steering and active damping. They are ideal for vehicle dynamics investigations in early development phases. Models for passenger vehicles, trucks and trailers are available. A user interface lets users configure the vehicles and define maneuvers and roads graphically.
Application Area: Electrical Components
Vehicle electrical systems, electric drives and inverters, as well as starter batteries and high-voltage batteries, are all virtualized precisely by the simulation model for electric components. The model supports tasks such as developing and testing hybrid ECUs, battery management systems, and indicator light controls. Users can parameterize the modeled components graphically to exactly fit the real controlled system.
Application Area: Driver Assistance Systems
A comprehensive traffic model with road users and environmental objects is available for developing and testing driver assistance systems. Different sensor models in the simulated test vehicle detect the other road users and also the static and dynamic objects in the virtual environment. The traffic scenarios and the environment are easily defined via graphics features. 

Model Design Philosophy – Open Models
For optimum support of customer-specific requirements, dSPACE has chosen an open model concept. This means that models are visible to users right down to the level of standard Simulink blocks. Thus, the dSPACE Automotive Simulation Models provide enormous flexibility for projects that require dedicated simulation models. The open model approach allows perfect adaptation to individual projects and requirements. This can be achieved by modifying models or by replacing or adding components.
Virtual Vehicle
dSPACE Automotive Simulation Models are a collection of well-coordinated models that you can easily combine to build anything from extended models to a whole virtual vehicle. In addition to gasoline and diesel engines, there are models for vehicle dynamics, brake hydraulics, electric systems and traffic. Combined models interact in one simulation.

Key Benefits
All the Simulink blocks in the model are visible, so it is easy to add or replace components with custom models to adapt the vehicle’s properties perfectly to individual projects. ASM’s standardized interfaces allow models to be easily expanded to meet specific requirements or even create a virtual vehicle. Roads and driving maneuvers can be easily and intuitively created using graphical tools with preview and clear visualization. 


Feature Description Benefit
Open Simulink model All model blocks are visible Custom models can easily be added or used to replace model components
Online-Simulation Real-time simulation on real-time hardware, e.g., DS1006  Hardware-in-the-loop simulations with production-level ECUs
Offline-Simulation Simulations as early as the controller algorithm design phase Controller validation in early development stages
Online tunable parameters Direct parameter access during real-time simulations Online parameter optimizations and behavior studies
ASMSignalBus Simulation signals are part of a structured Simulink signal bus Standardized and fast access to model variables 
Model interoperability ASM models are easy to combine to create a virtual vehicle An entire virtual vehicle can be simulated