桥式起重机智能快速设计系统的研究与实现

发布时间：2018-01-22 00:29

本文关键词： 桥式起重机快速设计 UGNX7.0二次开发专家系统　出处：《济南大学》2012年硕士论文　论文类型：学位论文

【摘要】：目前，，国内桥式起重机设计仍然以人工设计计算为主，以CAD软件进行非参数化建模为辅，对桥式起重机设计自动化的研究大多停留在零部件的参数化设计的层面上。本文以智能设计理论为基础，构建了包含从整机方案到零部件设计的桥式起重机智能快速设计系统。在前期大量查阅文献的基础上，系统总结了目前起重机设计中普遍存在的问题及其发展趋势，详细分析了桥式起重机的基本设计流程，并确定了本论文的研究目标。根据桥式起重机设计智能化的需求及人机智能设计的原理设计了系统的功能构成及模块设置，确定了系统的关键技术为知识库的构建及推理机制的确定，构建了系统的实现框架。研究了桥式起重机智能快速设计系统知识库的构建模式。对桥式起重机设计过程中所涉及到的知识进行了分类，研究并阐述了相关设计知识的表示方法、知识的关联分析和知识的获取方式等知识库关键技术，其中系统的知识表示方法采用产生式规则与框架混合表示方法，知识的获取则采用人工获取与自动获取的混合机制。根据桥式起重机的具体设计过程，构建了系统的知识库。研究了桥式起重机智能快速设计系统的推理机制，同时给出了推理过程中所涉及的大量模糊数值的处理办法。系统采用基于实例推理和知识推理的混合推理方式，并辅之以参数化驱动的设计方式，提高了设计效率。详细叙述了推理过程，完成了推理机的设计。模糊数值的处理方法包括针对区间数值采用的区间函数处理办法，针对单向数值采用的最近邻法和针对不确定性经验数值的可信度排序法。系统选用VC++2005开发人机交互界面和相关程序，图形支撑平台选用UGNX7.0，采用Microsoft OfficeAccess2003完成数据库设计，采用SQL语言开发了数据管理模块，实现对数据库表操作。利用面向对象的程序设计方法和系统集成的思想，实现桥式起重机智能快速设计系统的具体开发。最后，以20/5T双梁桥式起重机的设计为例验证了系统的有效性。
[Abstract]:At present, the design of bridge crane in China is still based on manual design and calculation, and the non-parametric modeling is aided by CAD software. The research of bridge crane design automation mostly stays on the level of parametric design of parts. This paper is based on intelligent design theory. An intelligent and rapid design system of bridge crane is constructed, which includes the whole machine scheme and component design. On the basis of a large number of previous literature, the paper summarizes the common problems and development trend of crane design, and analyzes the basic design process of bridge crane in detail. According to the demand of intelligent design of bridge crane and the principle of human-computer intelligent design, the function composition and module setting of the system are designed. The key technologies of the system are the construction of the knowledge base and the determination of the reasoning mechanism, and the implementation framework of the system is constructed. This paper studies the construction mode of knowledge base of intelligent and rapid design system for bridge crane, classifies the knowledge involved in the design process of bridge crane, studies and expounds the representation method of related design knowledge. The key technologies of knowledge base, such as knowledge association analysis and knowledge acquisition, are presented in this paper. The knowledge representation in the system adopts the hybrid representation method of production rules and framework. The knowledge acquisition is based on the hybrid mechanism of manual acquisition and automatic acquisition, and the knowledge base of the system is constructed according to the design process of the bridge crane. The reasoning mechanism of intelligent rapid design system for bridge crane is studied. At the same time, the method of dealing with a large number of fuzzy values involved in the process of reasoning is given. The system adopts a mixed reasoning method based on case-based reasoning and knowledge reasoning, supplemented by a parameterized design method. The design efficiency is improved, the reasoning process is described in detail, and the design of inference engine is completed. The processing method of fuzzy value includes interval function processing method for interval value. The nearest neighbor method for unidirectional values and the credibility ranking method for uncertain empirical values are used. The system uses VC 2005 to develop man-machine interface and related programs, graphics support platform using UGNX7.0. The database is designed by Microsoft OfficeAccess2003, and the data management module is developed by SQL language. The realization of database table operation, using the object-oriented programming method and the idea of system integration, the realization of bridge crane intelligent rapid design system specific development. Finally. The design of 20 / 5 T double girder bridge crane is taken as an example to verify the effectiveness of the system.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH215;TP311.52

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