回转型机械零部件设计缺陷的类比辨识研究

发布时间：2018-04-18 23:21

本文选题：机械零部件 + 设计缺陷　；参考：《电子科技大学》2012年硕士论文

【摘要】：为提高机械产品设计初期的设计验证效率，针对回转类机械零部件，提出了参数设计缺陷的类比辨识框架，对参数设计缺陷类比辨识的模型、算法和关键技术进行了较为深入系统的研究。将机械零部件的拓扑结构信息以功能面邻接关系结构码的形式表达，采用基于零部件结构码的检索方式对设计零件所属系列的类别进行检索。根据该系列模型功能面定位定形参数信息与尺寸参数的映射关系实现设计对象关键尺寸参数的自动提取。提出了以相似准则数为特征属性的相似度量方法，通过对设计零件和该系列零件库中每一个零件的相似度计算，进一步检索出与设计对象最相似零件的具体型号。提出了参数设计缺陷的三层层级类比辨识算法，以最相似零件的各层参数为依据，以相似理论为基础，对待验证对象的各层参数的设计缺陷进行了类比辨识，对其中的不合理设计参数进行了优化。基于上述的参数设计缺陷类比辨识模型和算法，，有效地辨识出了GY型凸缘联轴器和KL型滑块联轴器的参数设计缺陷，并给出了优化后的参数值。该设计缺陷的类比辩识方法适用于在回转类机械零部件的设计初期查找出大量的和明显的参数设计缺陷，能够有效地提高该类产品的设计质量和效率，缩短开发周期。
[Abstract]:In order to improve the efficiency of design verification in the early stage of mechanical product design, an analogical identification framework for parametric design defects is proposed for rotary mechanical parts, and a model of parameter design defect analogical identification is proposed.The algorithm and key technology are studied systematically.The topological structure information of mechanical parts is expressed in the form of functional surface adjacent relational structure code, and the category of the design part belongs to the series is searched by the retrieval method based on the part structure code.According to the mapping relationship between the shape setting parameter information and the dimension parameter of the model, the key dimension parameters of the design object can be extracted automatically.A similarity measurement method based on similarity criterion number is proposed. By calculating the similarity between the design parts and each part in this series of parts library, the concrete models of the parts most similar to the design object are further retrieved.A three-level analogical identification algorithm for parameter design defects is proposed. Based on the parameters of the most similar parts and the similarity theory, the design defects of each layer of the object are identified by analogy.The unreasonable design parameters are optimized.Based on the model and algorithm mentioned above, the parameter design defects of GY flange coupling and KL sliding block coupling are effectively identified, and the optimized parameters are given.The method of analogical identification of design defects is suitable for finding out a large number of obvious parameter design defects in the initial stage of the design of rotary mechanical parts, which can effectively improve the design quality and efficiency of this kind of products and shorten the development period.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH122

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