二十面体机构构型设计与分析
发布时间：2018-08-19 14:59
【摘要】：基于具有对称性和对偶性的正十二面体,设计了一种以三、四、五边形为耦合节点的二十面体单移动可展机构。首先,在正十二面体的十个面上添加一种顶点,通过增加顶点种类以增加耦合节点种类,从而得到具有三、四、五边形结构的节点构件。根据构件连接情况设计四类替换构件,将替换构件用转动副(R副)依次连接,构造耦合机构基础模型。其次,基于螺旋理论应用分流法计算其自由度。最后,进行主动输入选取分析及构建耦合机构的三维模型,设置方向相反的驱动条件分别进行仿真运动,应用Matlab得到动平台和节点构件的位置变化曲线,仿真结果与理论分析结果相统一,表明提出的机构具有伸缩运动特性。
[Abstract]:Based on the symmetry and duality of the normal dodecahedron, an icosahedron single moving developable mechanism with three, four and five quadrilateral coupling nodes is designed. Firstly, a vertex is added to the ten planes of the regular dodecahedron. By adding the type of vertex to increase the type of coupling nodes, the node members with three, four, and pentagonal structures are obtained. According to the connection of components, four kinds of replacement components are designed. The replacement components are connected with rotating pairs (R pairs) in turn, and the basic model of coupling mechanism is constructed. Secondly, the degree of freedom is calculated by using the shunt method based on spiral theory. Finally, the active input selection analysis and the construction of the coupling mechanism 3D model are carried out, and the driving conditions with opposite direction are set to simulate the motion respectively, and the position change curves of the moving platform and the node members are obtained by using Matlab. The simulation results are consistent with the theoretical analysis results, which show that the proposed mechanism has the characteristics of telescopic motion.
【作者单位】： 北京工业大学机械工程与应用电子技术学院;北京工业大学先进制造技术北京市重点实验室;
【基金】：国家自然科学基金项目(51475015)
【分类号】：TH112
本文编号：2192004
[Abstract]:Based on the symmetry and duality of the normal dodecahedron, an icosahedron single moving developable mechanism with three, four and five quadrilateral coupling nodes is designed. Firstly, a vertex is added to the ten planes of the regular dodecahedron. By adding the type of vertex to increase the type of coupling nodes, the node members with three, four, and pentagonal structures are obtained. According to the connection of components, four kinds of replacement components are designed. The replacement components are connected with rotating pairs (R pairs) in turn, and the basic model of coupling mechanism is constructed. Secondly, the degree of freedom is calculated by using the shunt method based on spiral theory. Finally, the active input selection analysis and the construction of the coupling mechanism 3D model are carried out, and the driving conditions with opposite direction are set to simulate the motion respectively, and the position change curves of the moving platform and the node members are obtained by using Matlab. The simulation results are consistent with the theoretical analysis results, which show that the proposed mechanism has the characteristics of telescopic motion.
【作者单位】： 北京工业大学机械工程与应用电子技术学院;北京工业大学先进制造技术北京市重点实验室;
【基金】：国家自然科学基金项目(51475015)
【分类号】：TH112
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