The main purpose of this study is to investigate the effect of visual stimulus on voluntary eye movement during driving. In this paper, we examine two cases: driving with/without visual stimulus by means of a driving simulator. We develop a model that consists of both vestibulo-ocular reflex (VOR) and optokinetic reflex (OKR) components. By comparing the observed eye movement and the simulation result of the model, the results of eye movement simulation was more accurate than VOR model only even in a naturalistic situation with optic flow of the visual scene and the driver’s voluntary eye movement.
The paper describes the simulation approach for quenching of aluminum and steel parts. The two materials require different treatment due to the release of latent heat during the cooling of steel. The boiling process within the liquid domain is treated with the CFD tool AVL FIRETM regardless of the solid material being quenched. For aluminum parts the solid is simulated using the same software, whereas for steel the latent effect requires usage of DANTEⓇ running within a commercial Finite Element tool. Liquid and solid domains are online coupled in both configurations.
This study investigated the electricity consumption properties of ultra-compact electric vehicles (UCEVs) in the real world. Vehicle running data collected in a social experiment of UCEVs implemented in Kato City, Japan, were used for an empirical study. The major findings suggest: 1) the average electricity consumption rate of UCEVs is 89.8 Wh/km; 2) UCEVs can reduce the CO2 emissions from vehicle use by approximately 67.0%; 3) gasoline cost savings amount by adopting UCEVs varies from 9,000 to 86,000 Yen annually for participants owning gasoline cars; 4) UCEVs have a lower maximal and average speeds than gasoline cars.
In this research, we conduct unsteady CFD to investigate the effect of engine bay flow on the steady and unsteady aerodynamics of the extended DrivAer model reproducing engine bay flow. Dynamic Mode Decomposition (DMD) is performed to analyze unsteady aerodynamics. As a result, it is revealed that different engine bay setups results in not only differences of steady aerodynamics but also the differences of unsteady aerodynamic characteristics. Furthermore, we perform an on-the-fly algorithm of DMD called Streaming Total DMD (STDMD) which can be conducted with much less memory than conventional DMD to investigate the relevancy and applicability of STDMD on the analysis of unsteady aerodynamics of a road vehicle.
Interior sound measurements play an important role in vehicle development and refinement. Sometimes hundreds of microphones are installed in an automotive cabin. During test preparation and execution, a lot of time is spent in determining the microphone positions and in tracking cables to the data acquisition channel. A smart acoustic localization approach is presented to automate this process and to realize considerable time gains. It is based on estimating the distance between a microphone and (at least 4) sources by acoustic time-of-arrival measurements, combined with novel algorithms that cope with reflections and non-line-of-sight issues. The method will be illustrated using in-vehicle measurements.
April 03, 2017 There had been a system trouble from April 1, 2017, 13:24 to April 2, 2017, 16:07(JST) (April 1, 2017, 04:24 to April 2, 2017, 07:07(UTC)) .The service has been back to normal.We apologize for any inconvenience this may cause you.
May 18, 2016 We have released “J-STAGE BETA site”.
May 01, 2015 Please note the "spoofing mail" that pretends to be J-STAGE.