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Revealing the mechanism of high loading capacity of the horse in leg structure

Revealing the mechanism of high loading capacity of the horse in leg structure
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摘要 To reveal the mechanism of high loading capacity,the characteristics of the mammalian leg skeletal structure are analyzed,and the horse is chosen as a typical example.The supporting situations of horse standing are presented,including the symmetrical case and the unsymmetrical one.According to the results of animal anatomy,the skeletal structures of the forelimb and the hind limb are appropriately simplified to plane open-chain five-link mechanisms.The force analyses of the five-link mechanisms are presented to explore the variations of joint moments in two aspects:changing the direction of the ground reaction force and changing the posture of the leg.It is concluded that the dead-point supporting effect of the leg skeletal structure help improve the high loading capacity.It means that horses bear loads mainly by bones rather than muscles.Hence horses could carry high loads with little energy consumption of leg muscles. To reveal the mechanism of high loading capacity, the characteristics of the mammalian leg skeletal structure are analyzed, and the horse is chosen as a typical example. The supporting situations of horse standing are presented, including the symmetrical case and the unsym-metrical one. According to the results of animal anatomy, the skeletal structures of the forelimb and the hind limb are appropriately simplified to plane open-chain five-link mechanisms. The force analyses of the five-link mechanisms are presented to explore the variations of joint moments in two aspects： changing the direction of the ground reaction force and changing the posture of the leg. It is concluded that the dead-point supporting effect of the leg skeletal structure help improve the high loading capacity. It means that horses bear loads mainly by bones rather than muscles. Hence horses could carry high loads with little energy consumption of leg muscles.
作者 Saijin Peng Xilun Ding
机构地区 Robotics Research Institute
出处 《Chinese Science Bulletin》 SCIE EI CAS 2014年第21期2625-2637,共13页
基金 supported by the National Basic Research Program of China the National Natural Science Fundation for Distinguished Young Scholar (51125020)
关键词 骨架结构 腿部 负荷容量 机制 五连杆机构 承载能力 哺乳动物 骨骼结构 Leg skeletal structure Plane open- chain five-link mechanism - Dead-point supporting effect High loading capacity
分类号 S821 [农业科学—畜牧学]
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Chinese Science Bulletin
2014年 第21期

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