Improving braking and cornering sensation in a driving simulator by developing an active seat belt tensioner
Examensarbete för masterexamen
This report is about the research, development, manufacturing and implementation of an active seat belt tensioner in a driving simulator delivered by Cruden, located at Chalmers university of technology. The seat belt tensioner is developed to work with a six point seat belt and is capable of tightening the shoulder straps individually to improve the sensation of both braking and cornering. A small user study was conducted to determine required tension force in the belts. Another test was made on the simulator platform, to estimate the required response time of the system. The design requirements were based on these tests. In order to maintain the budget of 4000 sek, a sponsor was required, Autoliv kindly provided two complete belt tensioner units. These units were slightly modified and the required supportive hardware was added. A mounting bracket for the tensioning devices was built and mounted on the simulator platform and the necessary software was created and implemented in Simulink. When the system was installed and tuned, another user study was made to investigate the potential performance gain in braking performance, along with improved braking and cornering sensation. The results from the subjective evaluation showed a clear improvement in both braking and cornering sensation, however it was not possible to statistically determine if the system has any affect on braking performance. In order to determine any change in braking performance, further testing needs to be conducted with a larger set of test subjects.
Active Seat belts , Simulator , Product development , Control system , Driver-In-the-Loop , Simulator experience