Ergonomic Evaluation of Interior Design of Shoka Vehicle and Proposing Recommendations for Improvement
February 2012, Volume 10 - Special Issue (6 صفحه - از 37 تا 42)
Objectives: One of the applications of ergonomics disciplinary is designing driver workstation compatible to users’ characteristics. The aim of this study was evaluation of interior design of Shoka vehicle with respect to the accommodation for Iranian population and proposing suggestions for customizing design of the vehicle. Methods: This study was a descriptive-analytical study conducted among thirty men from Iranian drivers population in 5, 50, 95 percentiles of the stature variable. Objective variables related to the occupant packaging and vehicle visual aspects including anthropometric variables, frontal, lateral, and side view and so on were investigated first. Then, subjective variables related to the driver mental workload and body comfort discomfort were studied using BMDMW and comfort questionnaires during 2-hour driving trial sessions. Results: Occupant packaging variables and hand-arm angle showed the least accommodation percent (53%). Seating angles showed low accommodation as well (73%). Among three percentile groups there were no significant differences between the mean values of mental workload during two hours driving task. The mean value related to the comfort discomfort was 3.9 during driving sessions. Discussion: Considering the findings in this study, it can be concluded that seating angles need correction and optimization. Taking mental workload results into account, it can be concluded that the interior design of the studied car had no influence on drivers’ mental workload. From the aspect of comfort/discomfort, Shoka vehicle showed neutral state among drivers. Optimizing seating angles, decreasing vibration, correcting stiffness of seating pan are suggested for customization of the ergonomics aspect of this vehicle.خلاصه ماشینی:
"Then, subjective variables related to the driver mental workload and body comfort discomfort were studied using BMDMW and comfort questionnaires during 2-hour driving trial sessions. Keywords: Ergonomic evaluation, Vehicle, Shoka, Anthropometric, Compatibility Introduction Safety and comfort are of the most important criteria for both car manufacturing companies and for drivers as well as occupants from many points of views. The most relevant to the ergonomics variables when considering occupant packaging are: interior dimensions (SAE J1100), hand control reach (SAE Methods and materials This study was a cross-sectional case study to evaluate the Shoka vehicle. There were two groups of variables to evaluate this car: 1) Quantitative variables selected from occupant packaging, and were related to SAE J1100 (interior dimensions), SAE J941 (driver's eye location) SAE J1517 (accommodation) these variables and the comparison standard values are shown in Table 1. Results related to the comfort-discomfort Participants reports (%) Among the internal factors related to the questionnaire, the factor of control shows significant difference in mean values between the three percentile groups, this is between the percentiles of Body state very comfortable comfortable relatively comfortable neutral relatively discomfort discomfort Lower extremity 0 12. Fatigue is one of the internal factors that showed no significant Iranian Rehabilitation Journal ۴١41 difference in mean values between three percentile groups. Considering various statures of the participants and no significant differences in fatigue values in the current study, it can be concluded that the vehicle interior dimensions doesn’t have remarkable effects on driver’s fatigue."
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