基于知识关联驱动的产品系列闭包设计及其重用方案研究

Study on closure design and reuse scheme of product series based on knowledge association driven

针对目前设计单元重用研究与开发中存在的主要问题,首先将用户需求覆盖范围映射为产品系列的参数与约束设计变动空间,以此定义其整体装配元模型;然后将各类设计、工艺及制造等广义知识嵌入产品系列元数据模型,与参数及约束建立关联关系,形成内蕴式设计闭包;通过参数驱动与知识推理机制,利用关键接口设置驱动其内部所有零部件尺寸结构以及广义知识的自适应更新。基于CAD平台建立企业的产品系列整体设计模型与知识库,形成完整的闭包式设计方案,内蕴尽可能完善的设计数据和设计知识。最后基于最小化的外部接口,分层递推复合参数化,利用简单的设置即可得到具体衍生产品的完整设计信息,实现设计重用,从而极大地提高设计效率。

Aiming at the main issue in the researches and development of the design unit reuse, the coverage of needs for users were mapped to the space of design varieties for all parameters and constraints in product series firstly, based on which the whole assembly metamodel was defined. Then the generalized knowledge of design, process and manufacture was embedded into the metamodels of product series, and the relations between parameters and constrains were established to form the connotated design closure. Through the mechanism of parameters driving and knowledge reasoning, the size and structure of all parts and the adaptive updating of the generalized knowledge were driven by the key interface settings. Based on the CAD platform, the whole design model and knowledge libraries of the enterprise product series were constructed, and complete closure design schemes were formed, which contains the design data and knowledge as perfect as possible. Finally, hierarchical recursive composite parameterization was applied based on the minimized external interfaces, and the complete design information of specific derivatives can be achieved through simple settings and the design reuse is realized, which greatly improves the design efficiency.