China
Africa
Explore chapters and articles related to this topic
Retractable structure for emergency buildings
Published in Alphose Zingoni, Insights and Innovations in Structural Engineering, Mechanics and Computation, 2016
The proposed model is a convertible roof that can be assembly in different situations. Convertible roof means a type of structure capable of changing its form within a short period of time, including roofs which can be partially or fully extended or retracted (Otto 1972). The studied retractable membrane roof refers to a type of convertible roof which the enclosed surface is formed by a tensioned membrane. It presents a remarkable light weight property and the possibility of having its membrane material (PVC coated polyester fiber) foldable.
Satellite Radio Antennas
Published in Victor Rabinovich, Nikolai Alexandrov, Basim Alkhateeb, Automotive Antenna Design and Applications, 2010
Victor Rabinovich, Nikolai Alexandrov, Basim Alkhateeb
An antenna mounted on a car roof (an ideal location) uses the metal roof plane as the ground and its performance typically meets Sirius and XM requirements. For certain car configurations (e.g., convertible), an antenna cannot be mounted on the roof. As stated in previous sections, the radiation pattern of a trunk-mounted antenna shows increased deviations for various azimuth angles. The same phenomenon is typical for an antenna mounted inside a vehicle, for example, under the front panel or deck lid.
Head excursions of rearward-facing child restraint systems in rear impacts
Published in Traffic Injury Prevention, 2023
D. A. Patton, J. A. Mansfield, J. Maheshwari, K. B. Arbogast
In Europe, CRS models are available that can accommodate children up to six years in a rearward-facing configuration, which are referred to as “extended-use” models. Patton et al. (2020) evaluated the head injury metrics of the Q-series 3- and 6-year-old (Q3 and Q6, respectively) ATDs seated in one such rearward-facing extended-use convertible CRS with and without lower tethers during 34 km/h rear impacts within the ECE R44 rear impact pulse corridor. HIC15 of the Q3 ATD was greater for the tests with lower tethers, whereas HIC15 of the Q6 ATD was greater for the tests without lower tethers. For tests without lower tethers, Patton et al. (2020) observed that the rearward-facing extended-use convertible CRS rotated rearwards and the heads of the Q3 and Q6 ATDs rotated above, but did not contact, the seatback of the test bench. The head restraint of the rearward-facing extended-use convertible CRS contacted the padded frame of the test buck and it was hypothesized that the head restraint and/or ATD head may contact the roof of a real vehicle. To test this hypothesis, the aim of the current study was to quantify the head excursions of pediatric ATDs seated in rearward-facing CRS models during rear impact sled tests and compare to roof heights of a range of vehicles in the current fleet.
Crash rates of convertible cars
Published in Traffic Injury Prevention, 2021
Convertibles involved in rollovers represent an interesting intersection between the current study and prior studies of roof strength and injury risk in rollovers (Herbst et al. 2004; Brumbelow and Teoh 2009; Brumbelow et al. 2009; Viano and Parenteau 2018). Results of these studies indicate, albeit not specifically for convertibles, that stronger roofs are protective to drivers during rollover crashes. On the other hand, the current study observed little difference in rollovers between convertibles and their nonconvertible versions, although these vehicles were not involved in many rollovers. Rollover protection from a convertible largely would be provided by strong A-pillars and rear structures such as pop-up roll bars, and it is not clear whether the test procedures used in those studies to measure roof strength (of nonconvertibles) could be directly applied to measure A-pillar strength of convertibles. Developing an appropriate test procedure for convertibles and investigating associated real-world differences in fatal/serious injury risk in convertible rollovers would be a promising avenue for future research.
Valve control of a hydraulically interconnected suspension system to improve vehicle handling qualities
Published in Vehicle System Dynamics, 2023
Behnam Jafari, Behrooz Mashadi
The double-acting cylinder pistons are enlarged arbitrarily, and the pipeline lengths are reduced due to vehicle smaller geometry in comparison with the Convertible model in Adams/Car default sets. For the sake of control, a Reference condition in the control switching mode has been pre-determined which is the passive mode and two other control modes. These control modes are named as Switch Control 1 and 2 in Table 4.