Archive for the ‘Modeling & Simulation’ Category

VTI-SimIV

Motion System Tuning of the VTI Driving Simulator IV

Vectioneer was hired to perform motion system tuning of the VTI Driving Simulator IV in Gothenburg, Sweden. Sim IV is the latest of VTI’s driving simulators and one of the most advanced in the world. It features an exchangeable cabin design for truck or passenger car cabins, a large Motion System from Bosch Rexroth which can generate realistic motion cues to the driver, a nine channel visual system with a cylindrical screen, VTI’s in-house developed image generator, sound system with a subwoofer capable of simulating vibrations, vehicle dynamics models and traffic simulation. VTI developed the simulator in-house with its industry partners.

The simulator is used for research into vehicle systems, such as trucks or cars. Currently is setup for truck simulation and will be used to perform experiments with driver assistance systems.

Vectioneer was hired to tune the motion system of the simulator to maximum performance and perform the final acceptance testing with VTI. Also Vectioneer assisted VTI with the Motion Cueing algorithms and trained the VTI researchers in the use of Rexroth’s Motion Cueing software.

Here are some interesting links about the VTI Driving Sim IV, some of which are only available in Swedish (but the images and videos are worthwhile):


Motion Cueing Tuning of the Tongji Driving Simulator

Motion Cueing Tuning of the Tongji Driving Simulator

Vectioneer provided its services during the Motion Cueing Tuning of the Tongji University advanced Driving Simulator in Shanghai, China. The simulator is one of the largest full motion driving simulators in the world and the first of its kind to be in use in China. The simulator has been designed and built by french company Oktal, who have already delivered a number of similar Driving simulators in Europe (Renault, Peugeot-Citroen, CTAG). The unique high performance Motion System has been designed and built by Bosch Rexroth in The Netherlands.

The Tongji University High Performance Driving Simulator

This simulator will be used by Tongji University to conduct research into automotive systems and especially into man-machine interaction. Using this simulator the University will have the capability to generate different driving scenarios using Oktal’s SCANeR software and evaluate human performance in the simulated environment. For instance it is possible to test driver assistance systems such as adaptive cruise control before even a prototype of such a system is built.

Vectioneer was contracted to perform initial tuning of the Motion Cueing Algorithms for the Simulator. Motion Cueing Algorithms provide the translation between the motion of the real vehicle and the motion of the simulator. In a simulator this translation is always necessary because of the limited workspace of a simulator; a simulator just cannot move you over the same distance as a real vehicle would because it has to stay in the building. This provides a challenge, since for the driver to me fully immersed in the simulation his/her perception of motion in the simulator should be the same as in the real vehicle (or at least as close as possible). The many parameters of the Motion Cueing Algorithm require tuning to the specific properties of the simulated vehicle, the simulated scenarios and the properties of the simulator hardware itself.

Philippe is tuning the Motion Cueing Algorithms with David Charondière (Oktal) in the car

The Motion System of the Tongji Driving Simulator consists of a standard Hexapod with a payload capability of 2500kg and an additional X/Y motion system to extend the range of longitudinal (X) and lateral (Y) motion capabilities. These additional motion capabilities are a huge plus for a driving simulator, since this means that longitudinal and lateral accelerations which are so important in car handling qualities can be simulated much better than with just a Hexapod motion system. The additional stroke that the X/Y system provides is 20 meters in X and 5 meters in Y.

The Tongji University High Performance Driving Simulator as seen from the control room

The Tongji Driving Simulator is now in the final stage of commissioning. It will be available for the Tongji University staff very soon.