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A Study on the Design Optimization System Using Knowledge Engineering Method

基于知识工程方法的设计优化系统研究

基本信息

批准号：
60490010
负责人：
AKAGI Shinsuke
金额：
$ 0.77万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

Engineering design is considered to be an ill-structured problem; it lacks not only well-defined solving algolisums but also goals to be reached. In this point, the knowledge engineering is expected to expand the design optimization method to the ill-structured design problems. An investigation was done to introduce the knowledge engineering to engineering design. The results obtained are summeried as follows:1. Firstly the characteristic of engineering design process is discussed generally from the view point of the application of the knowledge engineering. It is found that the design process can be devided into several steps. Namely, 1) recognition of design needs; 2) search of the design candidates satisfying the design needs; 3) evaluation of the acceptable design solutions among the design candidates; 4) design optimization to determine the optimal design solution.2. Based on the above understanding, the new design method coupling the knowledge engineering technique and the numerical optimization method is adopted to overcome the ill-structured engineering design problem as mentioned above. This concept is based on the idea that the ill-defined domain of design process whose solutions depended on the designer's experiences, i.e., the design knowledge, is supported by the knowledge engineering technique, and the well-defined domain of them is solved by the mathematical optimization method.3. A computer system for the design of marine power plants was developed in order to ascertain validity and effectiveness of the above proposal.4. The developed system was found to be effective not only for the tool of the design but also as the tool of instructing inexperienced designers.

工程设计被认为是一个结构不良的问题，它不仅缺乏定义良好的解决算法，但也要达到的目标。在这一点上，知识工程有望将设计优化方法扩展到病态结构设计问题。探讨了将知识工程引入工程设计的问题。主要研究结果如下：1.首先从知识工程应用的角度对工程设计过程的特点进行了一般性的讨论。研究发现，设计过程可以分为几个步骤。即：1）识别设计需求; 2）搜索满足设计需求的候选设计方案; 3）评价候选设计方案中可接受的设计方案; 4）设计优化，确定最优设计方案.在此基础上，采用知识工程技术与数值优化方法相结合的新设计方法，克服了上述结构不良的工程设计问题。这个概念是基于这样一种想法，即设计过程中定义不清的领域，其解决方案取决于设计师的经验，即，设计知识，以知识工程技术为支撑，用数学优化方法求解它们的定义域.为了验证上述建议的正确性和有效性，开发了船舶动力装置设计计算机系统.开发的系统被认为是有效的，不仅为设计的工具，而且作为指导经验不足的设计人员的工具。