基于特征与知识的航空钣金快速设计系统的研究与开发

Research on and Development of Rapid Design System for Aviation Sheet Metal Based on Features and Knowledge

传统航空钣金设计以几何作为操作对象,效率低下且无法有效集成设计知识,为此结合知识工程在CATIA平台上开发了基于特征与知识的航空钣金设计系统。系统以知识工程为依据,建立了参数化的特征库,利用设计表和数据接口,将特征库与标准文件库建立映射关系,进而形成以设计知识为核心的广义数据库;以广义数据库的导入取代传统几何设计,同时进行参数检测,确保自定义参数的准确性,最终实现快速设计。应用表明,系统的使用较大地提高了设计效率,实现了设计知识的继承,并且使设计更加规范。

The geometry is used as the operation object in the traditional design for aviation sheet metal,in which the efficiency is low and design knowledge can not in tegrated effectively.Thus the Knowledge Based Engineering can not be used to develop the design system for aviation sheet metal based on features and knowledge on CATIA platform.Through the application of Knowledge Based Engineering,a parametric Feature Library is established,and the Design Table and Date Interface is used to establish mapping relations between Feature Library and Standard File Library as to form a generalized database which takes the design knowledge as the core,which substitutes the database importing the traditional geometric design,and checks the parameters simultaneously to ensure the accuracy of custom parameters and finally realize the rapid design.After a trail of this design system,the given conclusion shows that the system greatly improves the design efficiency,achieves a succession of design knowledge,and makes the design more standardized.