含五副杆并联机构胚图自动生成方法研究

发布时间：2018-08-16 18:59

【摘要】：机构拓扑结构对机械创新和机械概念设计具有重要意义。机构拓扑图对机构结构综合来说是一种有效的机构型综合方法，为了对机构型综合做进一步研究，拓扑胚图被引入到机构的型综合。本文采用数组排列方式对含五元杆的拓扑胚图进行型综合，使用数组排列方式表示拓扑胚图是为了能够生成含更多基本连杆的拓扑胚图。在原有数组与拓扑胚图之间等价条件的基础上，提出了四条新等价条件，以完善数组与拓扑胚图之间一一对应关系；通过比较生成的数组，，提出了判别数组同构的对应条件。本文的创新点是利用计算机编程语言，自主研发了一套集自动生成关联连杆序列和数组，自动判断和删除关联连杆同构序列、同构数组和无效数组，自动绘制有效拓扑胚图和同构拓扑胚图等功能与一体的软件。在编程过程中，首先采用树形结构的编程方法生成对应的关联连杆的全部数组；然后在数组与拓扑胚图相互等价条件的基础上，提出了相对应的编程条件，逐步从全部数组中剔除无效数组，最终得到完整的有效数组；最后根据有效数组绘制其拓扑胚图。软件自动生成数组方法与观察法生成数组比较，前者不仅大大减少了工作量、节省了时间，而且还解决了后者的遗漏数组问题。使用软件自动生成一些关联连杆数组，与原数组比较，发现了很多遗漏数组，完善了这些关联连杆的拓扑胚图数组。结果表明，该软件能快速生成大量数组和绘制大量拓扑胚图，为后续的机构型综合研究打下了基础。
[Abstract]:Mechanism topology is of great significance to mechanical innovation and mechanical conceptual design. Mechanism topology graph is an effective mechanism synthesis method for mechanism structure synthesis. In order to further study mechanism type synthesis, topological embryo graph is introduced into mechanism type synthesis. In this paper, we use array arrangement to synthesize topological embryo graph with five-element rod, and use array arrangement to represent topological embryo graph in order to generate topological embryo graph with more basic connecting rod. On the basis of the equivalence condition between the original array and the topological embryo graph, four new equivalent conditions are proposed to perfect the one-to-one correspondence relationship between the array and the topological embryo graph, and by comparing the generated arrays, the corresponding conditions for discriminating the isomorphism of the array are proposed. The innovation of this paper is to use computer programming language to develop a set of automatically generating associative linkage sequences and arrays, automatically judging and deleting associative linkage isomorphism sequences, isomorphic arrays and invalid arrays. Automatic drawing of effective topological embryo graph and isomorphic topological embryo graph and other functions and integrated software. In the process of programming, the corresponding array of associative connecting rod is generated by the method of tree structure, and the corresponding programming condition is put forward on the basis of the equivalence condition between array and topological embryo graph. The invalid array is gradually removed from all the arrays, and the complete effective array is finally obtained. Finally, the topological embryogram is drawn according to the valid array. Compared with the observation method, the software can generate arrays automatically. The former not only reduces the workload and saves time, but also solves the problem of missing array. Some associative linkage arrays are automatically generated by the software. Compared with the original arrays, many missing arrays are found, and the topological embryogram arrays of these associative links are perfected. The results show that the software can quickly generate a large number of arrays and draw a large number of topological embryograms, which lays the foundation for the further study of mechanism synthesis.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH112

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