Cross-domain ECU testing and validation

With ETAS LABCAR-MODEL-VVTB, ETAS provides an open model platform for testing individual ECUs or several ECUs. The model describes an entire vehicle with its surroundings and driver. It provides a basic simulation of all the major domains, including the combustion engine, lithium-ion battery for the powertrain, the powertrain itself, and vehicle dynamics. This enables the simulation of vehicle architectures ranging from those powered by conventional combustion engines to purely electric ones.

To interconnect it with a real ECU, the model is expanded using one or more detailed component models from the LABCAR-MODEL family. These replace the basic models already present in LABCAR-MODEL-VVTB and offer interfaces for connecting to ECUs in a HiL scenario. Integration is seamless thanks to the unified, open model architecture and excellent adaptability for meeting customer preferences. This means LABCAR-MODEL-VVTB is compatible not only with all ETAS simulation models but also with models developed by third parties.

ETAS simulation models from the LABCAR-MODEL product family provide the models for hardware-in-the-loop solutions in a wide range of applications. Whether used separately, in a component HiL, or in conjunction with the simulation of an entire vehicle, ETAS simulation models can be adjusted to various real-world requirements.

Simulation speed through massively parallel execution

Expanding LABCAR-MODEL-VVTB with specialized models from the LABCAR-MODEL product family gives rise to a complex and highly detailed simulation of the entire vehicle. The requirements for maximum accuracy and real-time capability push even modern computer to their limits. For this reason, LABCAR-MODEL-VVTB can also be executed in co-simulation mode. Individual component models can then be spread across several CPU cores or even on different LABCAR-RTPCs in a NETWORK-LABCAR network HiL system. It is also possible to interconnect LABCAR-MODEL-VVTB with a series of field programmable gate array (FPGA)-based special models that are executed on the ES5340 electric drive simulation board.

Simple configuration and carrying out of virtual test drives

LABCAR-MODEL-VVTB features a virtual driver, which makes it possible to simulate test drives and tests on an engine test bed. The driver model enables:

  • Precise simulation of driver behavior with realistic gear shifting
  • Precise setting of vehicle speed – even in the dynamic range
  • Driving with the clutch closed and open for precise maneuvering of the virtual vehicle

There are different driver and test bench modes for the tests. Easy switching between the driver modes facilitates use of the driver model.

Testing of ECUs in conjunction with intelligent residual bus simulation

Increasingly, the only way to ensure comprehensive testing of distributed functions and meaningful test results is via a network of ECUs. If ECUs are not available during early development phases, they must be simulated to permit testing of the ECU network. The LABCAR-MODEL-VVTB simulation model contains the basic ECU logic with which to quickly set up a simulation of bus communication between ECUs.

Above all, this means LABCAR-MODEL-VVTB supports fast, structured closed-loop integration of individual ECUs in the NETWORK-LABCAR network HiL system.

Open implementation in Simulink® for maximum transparency

LABCAR-MODEL-VVTB is provided as a Simulink® model. Its open implementation enables users to follow the model structure down to the level of S-functions. It makes no use of proprietary interfaces, relying on basic Simulink® functions for improved handling and transparency.

From a single source

ETAS offers hardware, software, and models as well as engineering services for customization and expert consulting, all from a single source. This makes it easier to quickly integrate a project into the customer’s infrastructure and start the project up.

ETAS simulation models are easy to integrate into the ETAS tool chain. This can, for instance, comprise the LABCAR-OPERATOR configuration and experiment environment, ETAS ASCMO-MOCA for calibrating the simulation models.

Many years of expertise

ETAS has many years of HiL experience. As a result, these tried and tested models have already been broadly adopted by new customers and long-time power users. The models are refined in close cooperation with Robert Bosch GmbH’s Research and Advanced Engineering unit.