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Yutaka Fukui,Tsuneo Kawano,Keiichi Shirase,Nobuhiro Sugimura (사)한국CDE학회 2010 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
The purpose of this study is to develop a digital human model for evaluating the operations involving the rotation movements of the upper limb in hand-operated screw driving tasks. Experiments were carried out to derive the equations for estimating the maximum torque applied by the movements of the forearm and/or wrist about a screwdriver axis from the working posture of the upper limb. The applied maximum torque and arm posture were measured at each of 22 positions of the screwdriver for 8 participants. The results demonstrated that the measured torques varied with the arm postures. A torque-producing index was defined among the rotational axes and the height of the arm so as to correlate well with the measured torques. Finally, software was developed to estimate the applied maximum torque about screwdriver axis from the torque-producing index of any digital human’s posture.