Improvement of Rear Seat Vibrations of Passenger Bus by Tuning Damper Characteristics

2021 ◽  
Author(s):  
Sarnab Debnath ◽  
Abhishek Lad ◽  
Krishna Achanta ◽  
Devendra Bisht
Keyword(s):  
2021 ◽  
Vol 5 (4) ◽  
pp. 15
Author(s):  
Jingyi Li ◽  
Ceenu George ◽  
Andrea Ngao ◽  
Kai Holländer ◽  
Stefan Mayer ◽  
...  

Ubiquitous technology lets us work in flexible and decentralised ways. Passengers can already use travel time to be productive, and we envision even better performance and experience in vehicles with emerging technologies, such as virtual reality (VR) headsets. However, the confined physical space constrains interactions while the virtual space may be conceptually borderless. We therefore conducted a VR study (N = 33) to examine the influence of physical restraints and virtual working environments on performance, presence, and the feeling of safety. Our findings show that virtual borders make passengers touch the car interior less, while performance and presence are comparable across conditions. Although passengers prefer a secluded and unlimited virtual environment (nature), they are more productive in a shared and limited one (office). We further discuss choices for virtual borders and environments, social experience, and safety responsiveness. Our work highlights opportunities and challenges for future research and design of rear-seat VR interaction.


2021 ◽  
Vol 11 (1) ◽  
pp. 470-482
Author(s):  
Damian Frej ◽  
Andrzej Zuska ◽  
Emilia M. Szumska

Abstract The article presents the results of laboratory tests on the influence of the choice of the vehicle suspension position and the method of mounting child seats on the vibration comfort of children transported in them. Two child seats were used in the work. The B seat was attached to the vehicle with the ISOfix system, while the A seat was attached in the classic way (with seat belts). During the tests, the values of vertical vibrations were recorded on the seats of child seats, the rear seat of the vehicle and on the basis of ISOfix. The analyzed systems, depending on the method of mounting a child seat, may be characterized by two different vibration transmission chains. They depend on the method of fixing the child seat (the classic way of fixing the seat and the ISOFIX system). The article presents the results of empirical tests carried out at the EUSAMA SA.640 stand, which in these tests acted as a vibration generator with a frequency of 0 to 25 Hz. The analysis of the obtained results confirmed the observations published in previous articles about the negative impact of the use of the ISOfix base on the vibrational comfort of children.


2019 ◽  
Vol 17 (1) ◽  
pp. 3-13 ◽  
Author(s):  
Salaheddine Bendak ◽  
Sara S. Alnaqbi

PEDIATRICS ◽  
1969 ◽  
Vol 44 (5) ◽  
pp. 847-854
Author(s):  
G. Anthony Ryan

The part that children play in traffic accidents has been studied by numerous workers from differing points of view. Slätis,1 in a study of 5,291 persons injured in traffic accidents and receiving medical treatment in Sweden, found that 16.3% were less than 15 years of age. An examination by Mackay2 of a series of 250 accidents investigated at the scene in Birmingham, England, found that children less than 16 years of age formed 6.2% of the 464 persons involved. In Brisbane, Australia, Jamieson and Tait3 found that children less than 15 years old formed 10.9% of a group of 1,000 admissions or deaths from traffic accidents. Gädeke4 in Germany, found children less than 15 years old were injured more often in rural accidents, that traffic accidents formed 35 to 40% of all fatal accidents in children, and that injuries to the head and lower limb were most common. In Sweden, Ekström, et al.5 found that the majority of children involved in accidents they studied were pedestrians or pedal cyclists, and 40% were between 5 and 9 years old. Moore and Lilienfeld6 reported on 31,001 occupants of known age in 14,520 automobiles involved in injury-producing accidents on rural highways in the United States. They found that children less than 12 years of age formed 9%, adolescents age 12 to 18 years formed 16%, and adults of more than 18 years formed 75%. They found that children received fewer and less severe injuries than adolescents or adults, in each seating position. Front seat passengers in each age group were injured more often and more severely than rear seat passengers.


Author(s):  
David Wilfinger ◽  
Alexander Meschtscherjakov ◽  
Martin Murer ◽  
Sebastian Osswald ◽  
Manfred Tscheligi
Keyword(s):  

2015 ◽  
Vol 2015 (jun11 1) ◽  
pp. bcr2015209992-bcr2015209992 ◽  
Author(s):  
S. Madi ◽  
V. Pandey ◽  
K. Acharya ◽  
K. P. Peruvaje Ramakrishna

2012 ◽  
Vol 569 ◽  
pp. 795-799
Author(s):  
Liang Hong ◽  
Yun Teng Wu

To study the injury values rear seat occupants sustain in the frontal collision, this paper constructed the simulation model of the rear occupant restraint system of a vehicle model using MADYMO software. The influence of the rear 3-point seatbelt stiffness and retractor locking feature, the rear seat cushion stiffness and angle with the vehicle floor on head injury criterion HIC36, thorax 3ms resultant acceleration T3MS, thorax performance criterion THPC, left and right femur force of rear occupants were analysed through the simulation model. The conclusion shows that HIC36 drops when the seatbelt stiffness increases and retractor locking feature decreases compared to the original values; HIC36, T3MS, left and right femur force become less when the seat cushion stiffness decreases and angle increases compared to the original values.


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