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Investigating the Effect of Package Parameters on Driver Comfort Using the DOE Method and the DHM Ergonomics Analysis Tool
Mehdi Ganji, Milad Karimi, Behnoush Bahari,
Volume 6, Issue 4 ( Iranian Journal of Ergonomics 2019)
Abstract
Background and Objectives: Due to the necessity of the proper driver packaging, setting parameters for the driver to achieve the highest ergonomics of the driver has a great importance. The range of variations in some parameters of the package is wide, and the correct selection of the packaging parameters until to achieve driver’s ergonomics position, requires some tests.
Methods: In this study, using the MINITAB16 software and using these parameters, several driving simulation were performed using the DHM (Digital human modeling) and DOE (Design of experiment) tools. Hence, for the C segment vehicles, the range of all driver’s package parameters, such as seat height, steering angle etc., was extracted using the A2MAC1 site, and was considered as the basis for the input parameter. According to the proposed tests by MINITAB16 software, the driver’s comfort level was evaluated based on the PORTER (1998) criteria.
Results: The seat height and also vertical and horizontal distances of the steering wheel to the accelerator heel point have the greatest impact on the driver’s ergonomics. Also, due to the high correlation between some of the parameters of the package and the ergonomics outputs of the body while driving, predictive equations were presented in this regard.
Conclusion: The results are the optimal model for ergonomic driving position. The most influential parameters of the driver’s package are ergonomically known and using the ANOVA (Analysis of variance), mathematical predictor models were presented.
 

Investigating the effective factors in the positioning of the vehicle’s multimedia with the approach of mitigating the reflection while nighttime driving
Milad Karimi, Mahdi Ganji, Behnoush Bahari,
Volume 12, Issue 4 (Iranian Journal of Ergonomics-In Press 2025)
Abstract

Introduction: Nowadays, using digital displays in vehicles has become very common. Therefore, the reflection display screen issue as a virtual image on the vehicle's side windows at night is a controversial item in ergonomics position of designed display. Given the high importance of visual tasks, it is necessary to take ergonomics considerations into account during vehicle design process to achieve an optimal display position.
 

Methods: In current study, by identifying the factors affecting the placement of the central display inside the vehicle, and assigning level values for them, using the design of experiment statistical method with the full factorial way, the 243 runs were obtained from the combination of the identified factors using MINITAB version 18 software, and by implementing all the extracted runs, the amount of reflection from the central display on the side windows was subjected to statistical analysis of variance (ANOVA).
 

Results: significantly effective factors (including their interaction) on the response of the reflection of the virtual image on the critical vision zone and the total reflection on the driver's right and left side windows were identified, and the amount/direction of the factors' effect on the responses were analyzed by providing a linear regression model.
 

Conclusion: During the interior design process of the vehicle and when display packaging, the factors identified in this study can be used as a control tool to reduce or eliminate the concern of the amount of display reflection on the side windows in order to prevent driver's ergonomics problems while nighttime driving.


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