Development of driving test method based on lab test for BSR evaluation of seat-belt subsystem

Currently, the BSR (Buzz, Squeak, and Rattle) guideline for the seat belt system is managed only by measuring the dynamic stiffness at the seat belt mount position. It is necessary to improve this experimental method to reflect the actual driving condition. In order to achieve this improvement, this study determines the driving conditions and road conditions that are easy to reproduce BSR. Then, a lab test-based evaluation method is developed for evaluation convenience. In addition, a single product evaluation method is investigated to establish a test method for manufacturers of the seatbelt system. In addition, a modal analysis of the seat belt is performed, and structural reinforcement is proposed to improve the BSR.