计算机辅助机构选型的实现

将机构选型的初始要求划分成运动功能和功能质量两种类型，用规范化方法描述运动功能，用人类自然语言描述功能,在计算机辅助机构造型过程中，由计算机完成精确的推理过程，得到满足运动功能的机构解空间，由设计者根据知识库提供的机构功能质量评价知识，选择满足功率质量要求的机构解，完成模糊的推理过程，由此简化了计算机辅助机构造型的推理机制，实现了机构选型的自动化，解决了机械运动方案CAD中的一大难点，为运动方案CAD的实现奠定了良好的基础。

Accomplishing CAD of Selecting Mechanisms

ion:Task requirements of automatic selecting mechanisms were compartmentalized into motion function and function qualities. We described the motion function in standardization methods and represented function qualities in human language. In the process of automatic selecting mechanisms, the solutions meeting requirements of motion function were captured by accurate reasoning that were completed by a computer. These mechanisms and the appraisals about their function qualities were stored in knowledge base. Designer can select them according to function qualities of each mechanism and complete fuzzy reasoning.The reasoning method for automatic selecting mechanisms is so predigested, and automatic selecting mechanisms become reality. The difficulty of CAD for mechanical kinematic scheme is solved and then CAD for mechanical kinematic scheme has a good base.