Geometric Enhanced Ontology Modeling for Assembly Process Planning

doi:10.3901/JME.2015.22.202

Abstract

Abstract: Product assembly requirement that includes geometric and non-geometric information is the main reference for assembly process planning, thus has a significant influence on the result of decision making on assembly process plan. The more geometric information there is in the assembly process model, the more abundant the assembly process information such as assembly sequence and assembly path can be described, the better these data can support the assembly process decision making to improve the automation level of assembly process decision making. A geometric enhanced ontology model for assembly process is proposed to establish description, data structure for product geometric information by semantic ontology technology in assembly process planning. Then the geometric enhanced assembly process ontology model framework is proposed based on the ontology model. The framework can be divided into 2 parts, product geometric information and assembly process plan information and their relations in assembly process planning is depicted at first by the ontology model. Then the concept of reasoning unit is proposed to enhance the existing ontology reasoning capability so that the enhanced ontology model can be able to reason the complicated existing implicit relations between geometric information and assembly process plan and make these relations explicit and to support the decision making effectively in assembly process planning. An assembly sequence decision making problem for a transmission under the enhanced ontology model framework is illustrated to validate the effectiveness of the geometric enhanced ontology model for assembly process planning and the framework.

Key words: assembly process planning, geometric enhanced ontology, ontology reasoning, reasoning unit

QIAO Lihong, ZHU Yixin, ANWER Nabil. Geometric Enhanced Ontology Modeling for Assembly Process Planning[J]. Journal of Mechanical Engineering, 2015, 51(22): 202-212.

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