原型设计法在智能CAD中的应用研究

研究了基于原型的设计方法,考虑到机械设计的复杂性,提出了原型的五元组表达模型,即原型样图、属性、联接元、转换规则、原型标志.在模型中引入了图形元素,使原型的表达包含了丰富的信息;提出了基于原型的设计流程,即从简单的设计目标开始,通过设计要求分解器,将有关设计目标约束的信息输出到设计原型推理机1,原型推理机1从原型库选择合适的设计原型,并翻译成原型样图,送到原型推理机2,原型推理机2对精化的原型事例进行评价,进行必要的完善、修改,产生设计结果.这样逐层展开设计,所传递的信息量越来越大,解决了智能CAD技术中从概念设计到结构设计的难点,对具体产品的实例化具有指导意义.

Research of Usage of Prototype - based Design in Intelligence CAD

The method of prototype-based design is researched in this paper, and considering the complexity of mechanism design, a model with five elements to represent the prototype is provided, which are sample picture of prototype, property, coupling element, transforming rule, sign of prototype, the picture element is introduced in the model so that rich information is included in the prototype. The flow of prototype-based design is described as: start from a simple designing target, by the analyzing device of design requirement, send the information of target estrain to the reasoning machine 1, which can choose suitable prototype from prototype storage and send it to the reasoning machine 2, which can evaluate the instance of finished prototype, and then produce the designing results. So the design can proceed step by step, the information that is transformed between the steps becomes more and more ample, and then the bottleneck of lack information when mapping from concept design to structure design in Intelligence CAD(ICAD) can be overcome, which can guide the design of concrete product.