A Study on the Design Methodology for Plant Systems Using Knowledge Engineering Concept

运用知识工程的概念，研究了一种新的设备系统设计方法。并在此基础上开发了一个电厂系统设计专家系统。所得结果总结如下：1。建立了工厂系统设计方法学的新概念。研究发现，设计工厂系统的设计步骤可以被设计成以下步骤。即，1)搜索组成工厂的候选机器，2)确定机器的数量和能力，以及3)考虑初始成本和运营成本选择机器的最佳组合。在此基础上，利用知识工程技术中的面向对象知识表示概念，提出了一种新的设计方法。并将该方法应用于某装置设计专家系统中。研究了整数规划方法的应用。结合知识工程技术和数学规划方法，构建了一个混合型专家系统。smalltalk-80语言也被应用到电厂系统的管道设计中。利用该方法开发了船舶动力装置和热电联产装置的实际设计专家系统。开发的系统的有效性得到了很好的确定。该系统在Sun-3/110C工作站上实现，该工作站被认为是工厂系统设计的有效智能终端。

A new design methodology for plant systems design was investigated using knowledge engineering concept. And an expert system for plant systems design was also developed based on the developed design methodology. The results obtained are summarized as follows:1. The new concept of design methodology for plant systems was established. It is found that the design steps for designing plant systems can be devised into the following steps. Namely, 1) searching the candidates of machineries consisting the plant, 2) determining the numbers and capacities of the machineries, and 3) selecting the optimal combination of the machineries considering the initial and operational cost.2. Based on the above understanding, the new design method was developed using the ogject-oriented knowledge representation concept which was one of knowledge engineering techniques. This method was adopted to an expert system for the design of plants. The application of an integer programming method was also investigated. And a hybrid-type expert system was built coupling the knowledge engineering technique and the mathematical programming method. The smalltalk-80 language was also applied to the piping design for plant systems.3. The expert systems for the actual design of a marine power plant and a cogeneration plant were developed using the above method. The effectiveness of the developed systems was well ascertained.4. The systems were implemented on a workstation Sun-3/110C which was found to serve as an effective intelligent terminal for plant systems design.