Research On Application Scenarios Of Active Pretightening Seat Belts In Autonomous Vehicles

The evaluation of automobile safet y is mainly divided into active safet y and passive safet y.With the development of vehicle intelligence and autonomous driving,the research and development of vehicle safety s ystem has entered a new track.The current protection for collision scenarios such as occupant injury caused b y collision should be transformed into non-collision scenario protection for occupant inertial injury caused b y active safet y.Based on this theory,this paper puts forward the concept of vehicle safet y design combining active and passive.By using signals and algorithms of active safety,active and reversible protection for passive safety is added,and occupant protection function of passive safet y is used to patch the side effects of active safet y and improve driving experience.In the future,when the collision probability of L3 level and ab ove automatic driving technology is extremely low,the focus of vehicle safet y protection should be adjusted to the protection of non-collision injuries.The active pretension seat belt studied in this paper is an innovative product designed based on this concept.By tightening the webbing and adjusting the sitting position,it can solve the passenger displacement caused b y automatic steering and avoidance,and improve the protective effect of seat belt and air bag.By collecting radar and camera signals o f autopilot,scene identification support is provided for passive occupant protection.At the same time,the belt surrounding the occupant has the development potential of wearable devices,which can be used to enhance the human-vehicle interaction function and improve the sense of intelligent driving experience.Therefore,this product has the bridge role of combining active and passive safety.In this paper,the structure and principle of active pretension safety belt are briefl y anal yzed.CAE simulation analysis of AEB after braking was carried out.This paper focuses on the feasibility stud y of the vehicle development and calibration of active pretightening belt.A modification test was carried out on a CLASS L2 autonomous driving vehicle of SAIC-GM-Wuling,and feasibilit y study of mass production was conducted based on two routes of rapid development and scene demand development respectivel y.Rapid development,that is,based on the advanced Assisted Driving S ystem(ADAS)existing function defects,the u se of active pre-tightening seatbelt to compensate,improve its experience;Scene demand development,namely,corresponding development based on users’ actual driving and riding scenarios,to meet users’ needs.After comprehensive evaluation,it is conclud ed that the rapid development route is suitable for the rapid promotion of domestic cars at present,while the mass production of scene demand development is still challenging.Different from the conventional vehicle design based on the principle and structure of parts,this paper studies the vehicle application calibration development of the new product active preload safet y belt based on the occupant use scenario,aiming to build a vehicle safet y s ystem combining active and passive through its bridge func tion.In addition to the independent functions involved in this paper,In the future,it can be extended to the integrated development of ADAS functions,passive safet y products,seats,chassis,Windows and SOS systems,so as to carry out pre-plan protection with multi-system cooperation of vehicles in dangerous scenarios..