基于遗传算法的医疗显示器支架虚拟装配技术研究

发布时间：2018-05-21 10:48

本文选题：虚拟装配 + 装配序列规划　；参考：《合肥工业大学》2017年硕士论文

【摘要】：虚拟装配技术是虚拟制造的重要组成部分,虚拟装配主要研究内容有:装配信息模型的建立、装配工艺的规划以及干涉检测等方面。装配序列规划是装配工艺规划的核心内容之一,在很大程度上影响了产品设计制造的效率和质量,本文对利用遗传算法的装配序列规划进行了深入的研究。在医疗显示器支架的研发过程中应用虚拟装配技术,能够在产品设计阶段发现装配中的问题,并对产品模型进行改进,从而提高了产品研发的效率、降低了生产成本、提高了企业的竞争力。本文主要做了如下的研究工作:(1)描述了虚拟装配技术在国内外的研究现状,并对装配序列规划的发展做了总结。对虚拟装配技术的概念、分类以及关键技术进行研究,简单论述了装配路径规划和装配序列规划的方法。(2)对医疗显示器支架进行设计并建立三维CAD模型,对其模型进行层次划分,以便进行装配序列规划,并详细说明其各组成部分的结构。(3)对干涉矩阵的生成进行详细的说明,并简单介绍了遗传算法。在干涉矩阵的基础上,采用遗传算法对装配序列进行优化,以装配工具改变的次数和装配方向改变的次数为依据,建立相应的适应度函数,并选择适当的遗传算子,对产品进行装配序列规划。(4)以医疗显示器支架为研究对象,采用上述方法对其装配序列进行优化,并得到可行的最优装配序列。(5)用达索公司的DELMIA软件构建虚拟装配环境,并基于最优装配序列,采用拆卸法对医疗显示器支架进行装配仿真,对其装配路径进行规划,并进行碰撞干涉检测以发现装配中存在的问题。最后,对医疗显示器支架的物理样机进行装配实验,以验证虚拟装配的合理性和可行性。
[Abstract]:Virtual assembly technology is an important part of virtual manufacturing. The main research contents of virtual assembly include the establishment of assembly information model, assembly process planning and interference detection. Assembly sequence planning is one of the core contents of assembly process planning, which to a great extent affects the efficiency and quality of product design and manufacture. In this paper, the assembly sequence planning using genetic algorithm is deeply studied. The application of virtual assembly technology in the research and development of medical display bracket can find the problems in the product design stage and improve the product model, thus improving the efficiency of product development and reducing the production cost. Improved the competitiveness of the enterprise. In this paper, the following research work is done: 1) the research status of virtual assembly technology at home and abroad is described, and the development of assembly sequence planning is summarized. The concept, classification and key technologies of virtual assembly technology are studied. The method of assembly path planning and assembly sequence planning is briefly discussed. The model is divided into layers for assembly sequence planning, and the structure of each component is explained in detail. The generation of interference matrix is described in detail, and genetic algorithm is briefly introduced. On the basis of interference matrix, genetic algorithm is used to optimize the assembly sequence. According to the times of assembly tool change and assembly direction change, the fitness function is established, and the appropriate genetic operator is selected. The assembly sequence planning of the product. (4) taking the medical display bracket as the research object, the assembly sequence is optimized by the above method, and the feasible optimal assembly sequence is obtained. Finally, the virtual assembly environment is constructed with the DELMIA software of Dassault Company. Based on the optimal assembly sequence, the disassembly method is used to simulate the assembly of the medical display bracket, the assembly path is planned, and the collision interference detection is carried out to find the problems in the assembly. Finally, the physical prototype of medical display bracket was assembled to verify the rationality and feasibility of virtual assembly.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH77;TG95

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