Biomechanical model of human on seat with backrest for evaluating ride quality

Authors
Citation
Yg. Cho et Ys. Yoon, Biomechanical model of human on seat with backrest for evaluating ride quality, INT J IND E, 27(5), 2001, pp. 331-345
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Psycology,"Engineering Management /General
Journal title
INTERNATIONAL JOURNAL OF INDUSTRIAL ERGONOMICS
ISSN journal
0169-8141 → ACNP
Volume
27
Issue
5
Year of publication
2001
Pages
331 - 345
Database
ISI
SICI code
0169-8141(200105)27:5<331:BMOHOS>2.0.ZU;2-D
Abstract
This study is to develop a biomechanical model of human on a seat with back rest for evaluating the vehicular ride quality. In describing the human bod y motion, four biomechanical models are discussed: 1 DOF (degree-of-Freedom ) model mainly describes the z-axis motion of the hip, and 2 and 3 DOF mode ls describe the z-axis motion of the hip and head while 9 DOF model we prop osed includes the motions of the floor, hip, back, and head to describe the whole-body vibration in a sitting posture with backrest support. To validate the proposed model, we measured the accelerations at the hip, b ack, and head of 10 subjects with the floor under vertical vibration excita tion. From this measurement, three transmissibilities for each subject were obtained. We also measured the parameters including the material property of seat cushion. joint positions of human body, and the contact positions b etween human body and seat, while the other parameters such as stiffness an d damping at the hip, back, and head were determined by matching the model transmissibilities to the experimental ones. The 9 DOF model shows good mat ching for transmissibility at the both first 4.2 Hz mode and second 7.7 Hz mode. The comparison of the experimental data with those simulated using 1, 2, 3, and 9 DOF models shows that 9 DOF model provides the best descriptio n of the experimental results.