新的先进制造模式知识表示方法

NEW APPROACH TO KNOWLEDGE REPRESENTATION FOR ADVANCED MANUFACTURING MODES

针对解决知识化制造系统的自重构问题,提出一种新的基于知识网和Agent网的先进制造模式知识表示方法。首先给出知识网的定义及与Agent网的关系,定义知识网多重集及其与知识网的映射关系和知识网多重集的并、交、差等运算,其次给出知识网多重集的并、交、差及其混合运算性质,研究多重集运算性质的物理意义,比较多重集和经典集合在运算性质方面的异同点,定义知识网的完备性和两个知识网之间的割集及其多重割集。在此基础上,研究基于关系数据库的知识网实现和知识网推理机问题。最后通过知识化制造系统自重构的两个例子介绍基于知识网和Agent网的自重构方法,证实其有效性。

A new approach to knowledge representation for advanced manufacturing modes based on knowledge mesh （KM） and agent mesh （AM） is proposed to solve the self-reconfiguration problem of knowledgeable manufacturing systems. First, the definition of KMs is given and the relationships between KMs and AMs are presented. The multiple set and its mapping relationships onto the KM are then defined. The union, intersection and minus operations on the multiple sets of KMs are also defined and their related properties are presented. Physical meanings of properties of operations on the multiple sets are studied. Properties of operations on the multiple sets are compared with those of operations on the classical sets. Then the perfectness of a KM, the cut set between the two KMs, and the multiple cut set on the cut set are defined. On the basis of those above, the relational-database-based realization and the inference engine of KMs are studied. The self-reconfiguration methods based on both KMs and AMs are presented through two examples of self-reconfiguration of knowledgeable manufacturing systems, which verifies the validity of these methods.