Analysis of energetic features of the loaded walking subjected to the trunk flexion change = 허리각도 변화에 따른 하중 하 보행의 에너지 측면에서의 분석

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The purpose of this research is to analyze the energetic features of loaded gait subjected to the trunk flexion change. The feature of gait is analyzed by comparing the impulse, momentums and mechanical works between normal and loaded gait. For analysis, human gait is modeled as a simple mechanical system. Typical simple mechanical system is the simplest walking model like inverted pendulum. Merit of simplest model is able to predict energetic features of human gait like impulse, momentum and mechanical work. However, this model has a defect due to the assumption and simplification. It is because this model has in-stantaneous collision by simultaneous push-off and heel-strike impulses, so gravitational effect was ignored during a step-to-step transition. To work out this problem, Yeom proposed finite collision model for the double support phase of human walking. This model can analyze the gravitational effect on the center-of-gravity during the double support phase. Based on this model, energetic feature of loaded gait subjected to the trunk flexion change will be analyzed. To analyze the human gait, experiment was performed with 7 subjects comprised of trained active-duty sol-diers 5 and graduate students discharged from active service 2. Through this, we measured the ground reaction forces and kinematic data and calculated the collision impulses and mechanical work. The result shows mechanical work done during single support phase is always close to zero to minimize total net work. In other word, it means that human walk efficiently to minimize total net works in case of loaded gait. Furthermore, energy influx for walking occurs at double support phase. Therefore, it can be seen that most of the process is almost performed in the double support phase.
Kim, Soo-Hyunresearcher김수현Park, Su-Kyung박수경
한국과학기술원 : 기계공학전공,
Issue Date
514831/325007  / 020113241

학위논문(석사) - 한국과학기술원 : 기계공학전공, 2013.2, [ viii, 69 p. ]


Loaded gait; trunk flexion; momentum; gait analysis; 하중하 보행; 허리각도; 운동량; 충격량; 보행 석; impulse

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