Influence of feet vibration fatigue on driver braking reaction time(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年06期
- Page:
- 128-134
- Research Field:
- 交通工程
- Publishing date:
Info
- Title:
- Influence of feet vibration fatigue on driver braking reaction time
- Author(s):
- YUN Wei-guo; XIAO Run-mou; LI Bin
- School of Automobile, Chang’an University, Xi’an 710064, Shaanxi, China
- Keywords:
- traffic engineering; feet vibration; psycho1ogical evaluation; braking reaction time; intelligent assisted driving system
- PACS:
- U491.254
- DOI:
- -
- Abstract:
- In order to study the driver’s feet vibration fatigue effect on braking reaction time when the whole body exposed to vibration environment, 12 healthy trial volunteers served as the subjects. The volunteers had a certain representation in gender, age, weight, occupation, etc. They met the basic standards of domestic drivers. At first, an experiment was proceed through the ［0,1］ interval analogy evaluation method, using electromagnetic vibration exciter installed a real seat and a brake pedal to simulate the driving vibration environment. Secondly, the braking reaction time of every volunteer was experimented by the VBOX braking measurement system before and after volunteer’s foot suffered about two minutes vibration which is determined by the result of preliminary test (frequency 8 Hz, amplitude 6.45 m/s2). The results show that the corresponding average amplitude of vibrating acceleration to the efficiency boundary reduced for the feet vibration fatigue of 12 volunteers sitting is 6.45 m/s2, and the average braking feedback time of volunteers after 2 min tiredness of feet vibration for 2 minutes has been prolonged to 0.33 s. Moreover, the hysteresis speed for volunteers after the feet vibrating tiredness during braking has been increased tremendously. Volunteers felt numb and sluggish in their foot. It shows that the tiredness of feet has had an obvious impact on the time of braking for drivers. In addition, 0.59 m/s2 is calculated from the vibration limiting value of vertical direction orientation corresponding to the reduced efficiency boundary of feet vibrating tiredness for Chinese drivers under consecutive 4 h driving based on ISO 2631 the relationship between vibrating feedback and energy for body in this paper. Thus, the effects of feet vibrating tiredness on braking reaction time must be fully considered when the model of braking behavior setting for Chinese drivers are confirmed. The conclusion of this paper can provide a reference for the design of braking limiting value on the floor of vehicles and the development of vehicle intelligent driving assistance system.
Last Update: 2017-12-18