A novel approach to predict ingress/egress discomfort based on human motion and biomechanical analysis. (February 2019)

• Record Type: Journal Article
• Authors: Kim, Younguk; Lee, Kunwoo
• Is Part Of: Applied ergonomics. Volume 75(2019)
• Page Start: 263
• Page End: 271
• Publication Date: 2019-02
• Subjects: Ingress/egress -- Biomechanics -- Discomfort -- Motion analysis -- Feature selection; Human engineering -- Periodicals; 620.82
• DOI: 10.1016/j.apergo.2018.11.003
• Languages: English
• ISSNs: 0003-6870

Abstract

Abstract: This study proposes an ingress/egress discomfort prediction algorithm using an in-depth biomechanical method and motion capture database. The ingress/egress motion of the subject was captured using an optical motion capture system and physically adjustable vehicle mock-up. The subjective discomfort evaluation data were also recorded at the same time. The inverse kinematics and inverse dynamics were performed to analyze captured ingress/egress motion. These procedure provide motion and joint torque information on each subject. Based on the analysis results, this study proposes the following novel features: accumulated movement of joint and sum of rectified joint torque. This study conducted a feature selection procedure to identify a relevant feature subset. Recursive feature selection and optimal feature selection methods found the most relevant feature subset with collected subjective responses. Finally, we constructed the prediction model using support vector machine. The prediction model was evaluated through prediction accuracy and statistical analysis. For comparison with the previous study, this study implemented two representative models and compare the result with those of the previous studies using the identical dataset. The effectiveness of proposed algorithm was demonstrated in comparison with previous studies. Highlights: This study proposed an ingress/egress discomfort prediction algorithm using an biomechanical method and motion database. The biomechanical method provides the feature set representing discomfort, which is calculated from motion and force data. The optimal feature selection method choose the most relevant feature subset from joint motion and torque information.