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A model of conceptual mechanical engineering design for automated CAD.

机译：用于自动化CAD的概念性机械工程设计模型。

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摘要

In the present research, distinguishing features of mechanical engineering are investigated first. Based upon this, a general decomposition schema is proposed, in which any machine can be represented functionally in terms of units of power, transmission, work, control, support, tribology and auxiliaries. Based upon this representation, mechanical engineering design problems are classified, and the conceptual design of mechanical assemblies is selected as the major focus for further research toward design automation.;In this, actual designs are investigated by means of case studies detailed herein. Based upon this analysis and upon cognitive theory, an "impulse matching" model is proposed. According to this model, design knowledge is stored in engineers' long-term memory as "chunks" in the abstract form of Function-device Token (F-dT) pairs. Moreover, design configurations are stored in a similar manner. During the conceptual design process, the specified needs are searched and compared against functional "slots" of various device tokens. When a match is found, the related device token is returned as a solution, and thus a design alternative is generated. Consequently, an engineer with more chunks stored in memory is capable of generating more acceptable alternatives, and thereby, improved designs.;A prototypical expert system is built in accordance with the impulse matching model. In this, overhead cranes are used as a vehicle to demonstrate the concept. The result reflects the cognitive process of conceptual mechanical design and is shown to be suitable for computer automation.
机译：在本研究中，首先研究机械工程的显着特征。基于此，提出了一种通用的分解方案，其中任何机器都可以在功能，动力，传输，工作，控制，支持，摩擦学和辅助设备等方面进行功能表示。基于此表示法，对机械工程设计问题进行分类，并选择机械组件的概念设计作为进一步研究设计自动化的主要重点。在此，将通过本文详细介绍的案例研究来研究实际设计。基于这种分析和认知理论，提出了一种“脉冲匹配”模型。根据该模型，设计知识以功能块令牌（F-dT）对的抽象形式作为“块”存储在工程师的长期存储器中。此外，设计配置以类似的方式存储。在概念设计过程中，将搜索指定需求并与各种设备令牌的功能“插槽”进行比较。找到匹配项后，将返回相关的设备令牌作为解决方案，从而生成设计替代方案。因此，具有更多块存储在存储器中的工程师能够产生更多可接受的替代方案，从而改进设计。根据脉冲匹配模型构建原型专家系统。在此，将高架起重机用作车辆来演示该概念。结果反映了概念机械设计的认知过程，并被证明适用于计算机自动化。

著录项

  • 作者

    Zhang, Zhentao.;

  • 作者单位

    University of Central Florida.;

  • 授予单位 University of Central Florida.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 1989
  • 页码 113 p.
  • 总页数 113
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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