scholarly journals Enhancing Occupant Safety by Pre-active Seat Control for Out-of-seat Position before Autonomous Emergency Braking Operation

2021 ◽  
Author(s):  
Myeongkwan Kang ◽  
Hyungjoo Kim ◽  
Youngkuen Cho ◽  
Seonglae Kim ◽  
Dohyung Lim
Keyword(s):  
Active Safety ◽  
Seat Position ◽  
Occupant Safety ◽  
Emergency Braking ◽  
Test Conditions ◽  
Active Safety System ◽  
Neck Rotation ◽  
Additional Improvement ◽  
Seat Control ◽  
Safety Seat

Abstract The pre-active safety seat (PSS) is a recently developed active safety system for securing occupant safety in out-of-seat position (OOSP), which was applied in the Hyundai Genesis G80 in 2020. However, there has not been sufficient quantifiable verification supporting the effectiveness of the PSS. The present study was performed to determine the effectiveness of the PSS for occupant safety in OOSP and to identify areas for additional improvement. Six test conditions were considered to determine the effectiveness of the PSS for augmentation of occupant safety in OOSP. Ten healthy men participated in the tests. Compared with the no PSS condition, maximum head excursion and neck rotation were significantly decreased in the PSS condition by 0.31–0.79-fold and 0.33–0.48-fold, respectively (p < 0.05). The PSS condition in which the seat pan was moved forward to the mid position showed a greater effect in reducing the characteristic motions related to submarining, compared with the condition in which the seat pan was moved rearward to the mid position (p < 0.05). These results suggested that PSS augments occupant safety in OOSP. This study provides valuable insights in ameliorating risks to the occupant in unintended seat positions before braking and/or collision.

scholarly journals Investigation on Vehicle Dynamic Behaviour During Emergency Braking at Different Speed

2019 ◽  
Vol 16 (1) ◽  
pp. 6161-6172
Author(s):  
I. M. Zulhilmi ◽  
M.H. Peeie ◽  
R. I. M. Eiman ◽  
I.M. Izhar ◽  
S.M. Asyraf
Keyword(s):  
Dynamic Behaviour ◽  
Control Unit ◽  
Safety System ◽  
Active Safety ◽  
Hydraulic Control ◽  
Emergency Braking ◽  
Stopping Distance ◽  
Passive Safety System ◽  
Active Safety System ◽  
Simulation Results

Safety system of the vehicle can be divided into two main categories; passive and active safety system. The purpose of the passive safety system is to protect the occupant during an accident, while active safety system allows the vehicle to be manoeuvred to avoid any collision. Although active safety system can prevent the accident, in a critical situation such as emergency braking, the dynamic behaviour of the vehicle changes abruptly, and the vehicle becomes unstable. The objective of this study is to analyse the dynamic behaviour of the vehicle during emergency braking with and without anti-lock braking system (ABS). In this study, the dynamic behaviour of the vehicle is observed by the simulation model that has been developed in the MATLAB-Simulink. The analysis vehicle model is Universiti Malaysia Pahang (UMP) test car, model Proton Persona. During braking, when ABS control unit detect the wheel is to lock-up, the hydraulic control unit closed the hydraulic valve to release the brake pad on the wheel. This allows the wheel to spin intermittently during braking. From the simulation results, when ABS is not applied to the vehicle, the front tires were lock-up and the vehicle become skidding. However, when ABS is applied, the speed of all tires decreased gradually and the vehicle is not skidding. The simulation results also show that the stopping distance with ABS is improved 28% compared without ABS.

Corrigendum to “Vision-based active safety system for automatic stopping” [Expert Systems with Applications 39/12 (2012) 11234–11242]

2013 ◽  
Vol 40 (17) ◽  
pp. 6714
Author(s):  
Vicente Milanés ◽  
David F. Llorca ◽  
Jorge Villagrá ◽  
Joshue Pérez ◽  
Ignacio Parra ◽  
...  
Keyword(s):  
Expert Systems ◽  
Safety System ◽  
Active Safety ◽  
Active Safety System

Research of fatal car-to-pedestrian precrash scenarios for the testing of the active safety system in China

2021 ◽  
Vol 150 ◽  
pp. 105857
Author(s):  
Zhengping Tan ◽  
Yaoyue Che ◽  
Lingyun Xiao ◽  
Wenhao Hu ◽  
Pingfei Li ◽  
...  
Keyword(s):  
Safety System ◽  
Active Safety ◽  
Active Safety System

scholarly journals An Active Safety System for Low-Speed Bus Braking Assistance

2017 ◽  
Vol 18 (2) ◽  
pp. 377-387 ◽  
Author(s):  
Vicent Girbes ◽  
Leopoldo Armesto ◽  
Juan Dols ◽  
Josep Tornero
Keyword(s):  
Safety System ◽  
Active Safety ◽  
Low Speed ◽  
Active Safety System

scholarly journals Automatic Emergency Braking System using Hydraulic Actuator for Preventing Road Accidents

2019 ◽  
Vol 8 (6) ◽  
pp. 2967-2971
Keyword(s):  
Near Miss ◽  
Active Safety ◽  
Fatality Rate ◽  
Brake Pedal ◽  
Road Accidents ◽  
Hydraulic Actuator ◽  
Emergency Braking ◽  
Braking System ◽  
Critical Situation ◽  
Ir Sensor

The active safety progression and its implementation reduce the number of fatalities universally at present. The system enables to assist the driver during emergency and risky. The conventional braking system never prevents the collision during critical situation during sudden braking and the vehicle tends to impact. The statistics describes that near miss accidents are huge. The autonomous braking system plays wide role today to prevent the accidents and sadly the system is used only in expensive vehicles. The proposed design and the system can use in the low end vehicles to reduce the fatality rate by using mechanical actuator is connected to the brake pedal for compressing whenever the IR sensor senses the object. The aim of the research is to sense the object and to stop down the vehicle during emergency.

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