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下肢助力外骨骼是一种形似人体腿部结构,并联与穿戴者下肢外部,对穿戴者进行行走助力的机构.针对下肢助力外骨骼的行走特点,把其行走步态周期内的运动分成:单脚支撑、双脚支撑和一脚虚触地的双脚支撑三种行走模式,分别对此三种行走模式进行研究.构建动力学模型,求出各关节力矩,并通过仿真,验证其理论分析的正确性.下肢助力外骨骼的动力学研究为控制系统提供重要的理论依据,除外此研究结果也为仿人机器人的行走动力学研究提供重要的参考依据. 相似文献
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人体下肢外骨骼设计与仿真分析 总被引:3,自引:0,他引:3
设计了一种具有辅助士兵承载能力的人机一体化的下肢外骨骼.通过从仿生学角度分析人类下肢关节的结构特点、人类的步态及下肢自由度,并结合下肢外骨骼实现的功能、工作原理、结构组成,设计了其结构.利用CAD软件Pro/E及动力学仿真软件ADAMS对人体及下肢外骨骼进行了建模、仿真.这为进一步研究下肢外骨骼打下了基础. 相似文献
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被动储能助力外骨骼充分利用人体自身能量,减少人行走时的能耗。针对目前被动储能助力外骨骼多采用定刚度关节,在分析人行走过程中关节能量流动特性及刚度变化特点的基础上,设计了一种被动变刚度储能助力髋关节外骨骼,建立了人–外骨骼耦合模型,仿真得到人体在平地上步行功耗最小的最优刚度,以及在变刚度条件下人体总功耗、大腿主要肌肉肌力变化。研究结果表明:外骨骼的不同刚度会影响穿戴者行走过程中的能耗,在下肢屈曲和伸展过程中分别采用最优刚度,可进一步减少人体能耗。该结果对被动外骨骼设计中的刚度需求具有重要参考意义。 相似文献
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自然界中的生物蛇具有多种周期性运动方式如蜿蜒运动、直线运动和侧移运动等,步态的多样性极大的提高了自然蛇对复杂环境的适应性.生物学家通过研究证明脊椎动物的这种节律性运动方式是由中枢神经模式发生器(CPG)控制的.针对蛇形机器人高自由度的机械结构和不同步态的运动特点,利用Hopf振荡器模型的稳态特性建立了蛇形机器人的CPG步态模型,通过ADAMS仿真实现了1种九连杆八关节机器人样机的蜿蜒运动和三维空间内的侧向蜿蜒运动,并讨论了 2种步态之间的切换.仿真分析结果证明该CPG模型在实现蛇形机器人2种步态控制上的有效性. 相似文献
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已有的仿真建模中,为了减少复杂性,大多将人足模型简化为点或圆弧,这与实际情况相差较远.在C++Builder 6.0环境下利用“Open GL”图形库建立了3D仿人型机器人双足步行仿真系统,用多关节串联机构模拟足部,实现包括由前脚掌支撑、足部转动的多种步态方式,并分析步行中各种步态间的转换,根据机器人脚跟、脚尖与地面接触状态的变化动态切换不同的步态方式,符合人足步行的实际情况,增强了机器人步行的灵活性与拟人性.该系统的控制部分采用位置反馈与正弦驱动相结合的行走控制方法,通过对人足模型的多关节动力学建模,有效地实现了机器人的稳定步行仿真,并实现了步行过程中的实时步态调整. 相似文献
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结合基于预观控制的ZMP步态生成模式的优点并引入脚尖脚后跟与地面间的旋转关节,以生成双足步行机器人质心和踝关节轨迹,同时提出了侧向质心摆动幅度递减方法以降低快速步行下侧向关节力矩.通过2km/h双足动步行样本生成实例,利用机械设计与动力分析软件在虚拟物理环境下实现了快速动步行,验证了所提出方法的有效性. 相似文献
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《系统工程理论与实践》2014,(5)
正August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists 相似文献
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《系统科学与系统工程学报(英文版)》2014,(2)
正AF:Any Field The School of Economics and Management at Tsinghua University(Tsinghua SEM)invites applications for faculty positions at all levels(Assistant Professor,Associate Professor and Full Professor)in any fields of business administration and management.Tsinghua SEM is the only school 相似文献
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The paper is about negotiating with issues that discourage innovation. The subject is environmental deterioration, with concern directed at the impediments that keep it from being innovatively resolved. The paper is organized around three issues. (1) The dominant model of environmental concern, called environmental protection, is managed predominantly via command and control approaches. (2) Command and control, by relying on analytical segmentation to subdivide the problem into digestible bits and using formal legislation to direct it, are not up to emerging challenges in the area. (3) More robust models are available but difficult to experiment with due to impediments that discourage change. These impediments are seen in ideals associated with protection, prevention, recycling, and sustainability that tend to do more to sustain harmful practices than to seek beneficial alternatives. Being able to appreciate the underlying restrictions of entropy could help stimulate a more innovative agenda. These issues are tested via a project funded by the EPA entitled ENERGY STAR Homes. 相似文献
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This paper presents an outline of an Oriental systems methodology: the Wuli Shili Renli approach (WSR). The basic theme of WSR contends that wuli (regularities in objective existence), shili (ways of seeing and doing), and renli (patterns underlying human relations) constitute a differentiated whole that conditions systems projects. WSR suggests that we should design and employ appropriate methods to address and tackle wuli shili and renli elements in a theoretically informed and systemic way. The background, philosophy, process, principles, and some practical applications of the methodology are preliminarily outlined. 相似文献
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