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基于多坡度运动的岩羊垂直地反力特征
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作者 刘翔宇 隗海林 +1 位作者 钱志辉 任雷 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2021年第9期1668-1675,1704,共9页
为了给具有优异攀爬性能的仿生四足机器人提供仿生蓝本,以岩羊为研究对象,利用内嵌压力板的可变坡度斜坡通道,测试其四肢垂直地反力在不同坡度上的变化规律.结果表明,岩羊在平地上行走时,前后肢左右两侧的垂直地反力峰值和垂直冲量完全... 为了给具有优异攀爬性能的仿生四足机器人提供仿生蓝本,以岩羊为研究对象,利用内嵌压力板的可变坡度斜坡通道,测试其四肢垂直地反力在不同坡度上的变化规律.结果表明,岩羊在平地上行走时,前后肢左右两侧的垂直地反力峰值和垂直冲量完全对称,前肢对称指数分别为99.16%、99.62%,后肢对称指数分别为98.65%、99.42%.随着坡度的增加,岩羊调整四肢的垂直地反力分布以防止跛行,导致左右蹄的对称性指数出现波动.当岩羊在平地行走时,前肢比后肢承受更多的垂直地反力,后肢承受的垂直地反力随着坡度的增加逐渐增多.岩羊肢体左右侧的差异性指数随坡度的变化具有相似性,当坡度为0~35°时,岩羊肢体左右侧差异性指数的均值分别为1.298、1.3057、1.1744、1.22375、1.0175、0.8905、0.7778、0.7535. 展开更多
关键词 工程仿生学 岩羊 可变坡度 压力板 垂直地反力
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Is changing footstrike pattern beneficial to runners? 被引量:6
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作者 Joseph Hamill Allison H.Gruber 《Journal of Sport and Health Science》 SCIE 2017年第2期146-153,共8页
Some researchers, running instructors, and coaches have suggested that the "optimal" footstrike pattern to improve performance and reduce running injuries is to land using a mid-or forefoot strike. Thus, it ... Some researchers, running instructors, and coaches have suggested that the "optimal" footstrike pattern to improve performance and reduce running injuries is to land using a mid-or forefoot strike. Thus, it has been recommended that runners who use a rearfoot strike would benefit by changing their footstrike although there is little scientific evidence for suggesting such a change. The rearfoot strike is clearly more prevalent. The major reasons often given for changing to a mid-or forefoot strike are(1) it is more economical;(2) there is a reduction in the impact peak and loading rate of the vertical component of the ground reaction force; and(3) there is a reduction in the risk of a running-related injuries. In this paper,we critique these 3 suggestions and provide alternate explanations that may provide contradictory evidence for altering one's footstrike pattern.We have concluded, based on examining the research literature, that changing to a mid-or forefoot strike does not improve running economy, does not eliminate an impact at the foot-ground contact, and does not reduce the risk of running-related injuries. 展开更多
关键词 EPIDEMIOLOGY Footfall patterns FOREFOOT Ground reaction force Impacts MIDFOOT REARFOOT Running economy
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