本文针对机械产品设计过程的多阶段、多层次的特征,提出了机械产品设计知识组织的层次结构模型和设计过程框架(DPF)描述概念,研制出设计过程的控制结构和DPF程序处理器,使完成某一设计任务的专家系统可以采用多知识表示形式和多推理模式,以满足机械产品设计复杂过程的需要。 In this paper, according to the multi-stage and multi-level features of mechanical product design process, the hierarchical structure model and design process framework (DPF) description concept of mechanical product design knowledge organization is proposed. The control structure and DPF program processor of the design process are developed. Expert systems that accomplish a design task can employ multiple knowledge representations and multiple inference models to meet the needs of a complex process of mechanical product design.