文档介绍：南京航空航天大学博士学位论文
Abstract
Computer Aided Process Planning(CAPP) acts as the bridge puter
Aided Design puter Aided Manufacturing, which has an important effect on
the quality and cost of product development. In this dissertation, by analyzing
contemporary manufacturing enterprises’ requirements for CAPP functions, key
technologies of knowledge based cooperative CAPP system have been investigated,
such as domain model, knowledge integration, cooperative process planning and
optimization ,and so on. The main contents and achievements of the dissertation are as
follows:
1. Firstly the dissertation presents the history, state of the art and research trend
of CAPP. Then the problems which CAPP faces in practical applications are analyzed.
Furthermore, the necessity to establish knowledge based cooperative CAPP system is
put forward.
2. The requirements of CAPP system for knowledge management and
cooperative process planning are analyzed, and key techniques of knowledge based
cooperative CAPP system are proposed in detail. Meanwhile, a multi-level model of
cooperative process planning is presented. Then, the target, work flow and system
structure of the knowledge based cooperative CAPP system are given.
3. CAPP domain analyzing and modeling based on ontology have been studied.
The role of ontology in domain analyzing is described, and an idea that ontology
model and UML model bined to describe CAPP domain is put forward. Then
a multi-level domain ontology model is proposed, the domain ontology development
principle is described, and the domain ontology development method is given. In
addition, an extensive study on the development procedure of CAPP domain ontology
is carried out. The mapping rules from ontology model to UML model are presented,
so that the corresponding UML model can be obtained through the ontology model.
4. CAPP knowledge integration and retrieval based on ontology have been
studied. By analyzing