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題名 | Initial Gait Analysis=正常人的起步分析 |
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作者 | 周有禮; 蘇芳慶; 洪紹鴻; 周伯禧; | 書刊名 | 力學 |
卷期 | 9:4 1993.12[民82.12] |
頁次 | 頁301-307 |
分類號 | 416.61 |
關鍵詞 | 起步; 重心; 壓力中心; 能量; Initial Gait; Center of Gravity; Center of Pressure; Energy; |
語文 | 英文(English) |
中文摘要 | 本文以11位正常年青人為實驗對象,對從靜止站立至第二隻腳腳尖離地止之起步 ,作力學上的分析。首先以測力板量得反力,且求得壓力中心的位置變化,再以剛體模式求 得重心的速度與位移變化同時重心的能量變化以及功率的需求亦可以計算得到。結果顯示, 起步一開始,壓力中心先向擺盪腳向後移。重心則向站立腳向下向前移,壓力中心與重心之 間相對關係位置的變化是起步的必要條件。重心的上下位移量在起步時比之步態周期來得大 ,而且於起步後一步,速度便可以達到慢速步態周期的平均速度。 |
英文摘要 | The initiation of gait, from standing at rest to the toe-off of the second leg, was analyzed in 11 normal young subjects. Using a force platform, the three commponents of a force acting on the platform were measured, then the center of pressure could be determined. Based on rigid body model, the three-dimensional displacements and velocities of the center of gravity were estimated from platform data. The energy levels and the power requirements of the center of gravity were also calculated. The pattern of force acting on the platform, the trajectory of the center of pressure, and the displacement, velocity, and energy levels of the center of gravity were described and analyzed. Results show that at the beginning of the initiation of gait, the COP moves backwards and towards the swing leg, but the COG is falling towards the stance leg and forwards in the direction of progression. The unbalanced phenomena is essential to walk. The vertical displacement width of the COG in the period of initial gait is larger than that in the period of gait cycle. Further, at the end of the first step, the progression velocity of the COG can reached the slow velocity of steady-state gait. |
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