Abstract:

Integrated active pretension seatbelt (IAPS) is an occupant restraint protection system integrated with several advanced driving assistance systems (ADAS). This paper investigated the occupant acceptance to IAPS, and gave some measures to improve the acceptance for developing and applying the IAPS. The bench test with a 50% th male dummy and the road test with 20 volunteers were carried out. The effects of three factors on occupant acceptability, i.e. the first-level pre-tensioning, the pre-tensioning frequency and the pre-tensioning noise value, analyzed. The results show that the minimum threshold of discomfort caused by the primary pre-tensioning is different among different volunteers, when the primary pre-tensioning is set at 124 N. Optimizing the TTC (time to crash) reduces the threshold value when original IAPS has a higher pre-tensioning frequency while the pre-tensioning noise value does not cause additional  interference to the occupants. Therefore, these optimization measures improve occupants' acceptability to the IAPS.

Key words: automotive passive safety, integrated active pretension seatbelt (IAPS), real vehicle test, advanced driving assistance system (ADAS), occupant acceptability