Construction of Intelligent CAI System for Electronic Circuits

在本研究中，我们尝试建立一个新的工作站知识库系统，供电气专业学生学习半导体器件、电子电路和电路设计方面的知识，该系统在技术上取得了显著的进步。LISP作为电子电路的ITS组成。我们制作了能够识别日语简单答案的用户界面，绘制了能够表明学生意图并识别其电路结构的电路图，以及用于表达电路物理行为的数值处理。并尝试开发ITS的学生模型和辅导模块。我们可以根据学生的能力和进步来实现个别化的辅导方法。在用C语言进行符号处理构成的电路设计知识库与推理机制分离的专家系统中，扩展到具有数值分析器和联立方程处理器等功能。因此，我们可以很容易地从知识库中获取新的、复杂的电路设计信息和启发式知识。作为模拟电路设计的新方法，我们提出了利用模糊理论进行设计。我们尝试使用与设计规范相对应的模糊集来理解它们之间的相互依赖关系。利用模糊决策可以估计出各元件的最优用量和器件模型参数。规范了电路设计的精确步骤，并对电路中元件值的测定进行了优化。

In this research, we try to produce new knowledge bases systems on a work station for students majoring electrical areas to study about semiconductor devices, electronic circuits and circuit designings which have made remarkable technological advancement.As a ITS for electronic circuits made up LISP. We produced the user interface making possible to recognize simple answers in Japanese words, the circuit diagram drawing to indicate intentions of students and to recognize its circuit structure, and the numerical processing for expressing physical be haviors of circuits. And we tried to develop the student model and the tutoring module for ITS. We can realize the individual tutoring method according to student ability and progress.In a expert system that separates the knowledge bases and the reasoning mechanism for electronic circuits designing made up by symbol manipulation of C language, we extended to have the numerical analyzer and processor of simultaneous equations and so on. Consequently, we could easily get new and complicated informations and heuristic knowledge about the circuit designing in the knowledge bases.As the new methods of the designing of analog electronic circuits, we proposed the designing utilizing fuzzy theory. We tried to use the fuzzy sets which correspond to the design specifications and we could understand the mutual dependences among them. We could estimate the optimum amount of each element and device model parameters by utilizing the fuzzy decision. We could standardize the precise procedures of designing and had the optimum determination of element valuesin electronic circuits.