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Study on Function-Based Design Support Techniques of Engineering Systems

工程系统基于功能的设计支持技术研究

基本信息

批准号：
07650175
负责人：
GOFUKU Akio
金额：
$ 1.54万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

As a functional modeling technique to represent design information including designer's intention, the Multilevel Flow Modelling (MFM) proposed by Lind has been investigated. The MFM has the problems that (1) it can not model the change of energy form and (2) it has little relation to what is called design chart because it does not represent system structure. The problem of item (1) is solved by expressing explicitly the energy form such as heat, and so on. To get rid of the problem of item (2), the strucuture-function and structure models are added to a MFM model. A four layrs design model composed of goal, function-goal, function-structure, and structure models are proposed.An interface system is developed to make four layrs design models on a Smalltalk-80. The design information of a central heating system and a dust process system is expressed using the interface system. Through the expression trials, design information is confirmed to be expressed systematically and in well organized form. Moreover, it is shown that the difference of design intention is clearly expressed. A simple support system to assign structure to functions is also developed.The system behavior is derived from the system structure expressed in the four layrs design model by applying the Hybrid Phenomena (HPT) proposed by Woods and combining system structure model and numerical simulation programs. The HPT is extended to treat multiple models by introducing the factors of modeling ontologies proposed by Kiriyama. The effectiveness of the techniques of structure assignment to functions and behavior derivation is examined by a conceptual design of the central heating system.

作为一种表示包括设计者意图在内的设计信息的功能建模技术，Lind 提出的多级流建模（MFM）已得到研究。 MFM存在的问题是：（1）它不能对能量形式的变化进行建模；（2）它与所谓的设计图关系不大，因为它不代表系统结构。第(1)项的问题是通过明确地表达热量等能量形式来解决的。为了解决第(2)项的问题，在MFM模型中添加了结构-功能和结构模型。提出了由目标、功能-目标、功能-结构和结构模型组成的四层设计模型。开发了一个接口系统，在Smalltalk-80上实现四层设计模型。利用接口系统表达集中供热系统和粉尘处理系统的设计信息。通过表达试验，证实设计信息能够系统、条理清晰地表达出来。此外，还表明设计意图的差异被清楚地表达出来。还开发了一种简单的将结构分配给功能的支持系统。应用Woods提出的混合现象（HPT）并结合系统结构模型和数值模拟程序，从四层设计模型中表达的系统结构导出系统行为。通过引入 Kiriyama 提出的建模本体因素，将 HPT 扩展到处理多个模型。通过中央供暖系统的概念设计来检验功能和行为推导的结构分配技术的有效性。