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CAE, Simulation & Modeling

Mechanical Simulation updates its vehicle dynamics simulation software

Rachel EvansBy Rachel EvansJuly 24, 20183 Mins Read
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Mechanical Simulation updates its vehicle dynamics simulation software

Mechanical Simulation has updated its vehicle dynamics simulation tools, releasing 2018.1 versions of CarSim, TruckSim, and BikeSim. Departing from its usual yearly release schedule, this release comes just seven months after the previous major update of the packages in December 2017.

Dr Michael Sayers, CEO and CTO at Mechanical Simulation, explained the relatively short timescale: “Our past practice was to provide a major software upgrade about once per year, and at the half-way point incorporate minor updates for bug fixes or features that weren’t quite ready for the full release.

“In earlier days, our products were used mainly to study vehicle dynamic behavior, and many of the improvements involved the math model of the vehicle behavior.”

The difference is that the focus for the simulation software is no longer just vehicle dynamics, as customers are increasingly wanting to incorporate validation of controllers for ADAS (advanced driver assistance systems) and autonomous driving in progressively more complicated scenarios.

Such simulations must include more vehicles, operating under a wider range of conditions, and with more interactions between the subject vehicle and pedestrians and other vehicles.

In past applications, according to Mechanical Simulation, a vehicle might be simulated a few thousand times to characterize dynamic behavior, replicating the physical tests usually carried out in closed proving grounds.

Sayers stated that, “Simulated conditions have expanded to include running with the many built-in controllers in hundreds of thousands or even millions of simulations to cover situations in which the controllers must always perform safely.”

All this means that in addition to vehicle math models and visualization tools, the simulation tools need to include multiple 3D road surfaces, other vehicles, and options for pedestrians and/or animals.

The software packages have been extended to fill these needs, with many new animation resources such as walking pedestrians, moving cyclists and running animals, road surfaces and paint markings, road signs, and other features and potential hazards that appear along a road.

These resources can be developed using a tool called VS Scene Builder (introduced in the previous 2018.0 versions), which can build scenes, with a ‘drag-and-drop’ function to locate paths and objects. A web-based tool called Atlas can download GPS data from mapping services such as Google in order to simulate existing roads and intersections.

For the 2018.1 release, Mechanical Simulation claims there are many improvements in the vehicle models, but that the improvements are perhaps more significant in the scenario-building tools and supporting resources.

According to the company, new capabilities include: improvements in the Atlas tool to include GPS altitude along with latitude and longitude when downloading data; improved smoothing and editing of data when importing GPS data into CarSim, TruckSim and BikeSim; and software improvements in VS Scene Builder (undo/redo, dragging and dropping animator assets into the scene, access to global X-Y coordinates in scene).

The shorter timescale for the introduction of 2018.1 is not an anomaly, as Sayers added that the rapid pace of ADAS development process and the need for ever-more powerful simulation systems means that the company will now be making major product releases at six-month intervals.

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Rachel Evans

Rachel's career in journalism has seen her write for various titles at UKi Media & Events within automotive, tire and marine. Currently editor of ATTI, her favourite aspect of the job is interviewing industry experts, including researchers, scientists, engineers and technicians, and learning more about the groundbreaking technologies and innovations that are shaping the future of transportation.

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