摘要
Due to the complex,uncertainty and dynamics in the modern manufacturing environment,a flexible and robust shop floor scheduler is essential to achieve the production goals.A design framework of a shop floor dynamical scheduler is presented in this paper.The workflow and function modules of the scheduler are discussed in detail.A multi-step adaptive scheduling strategy and a process specification language,which is an ontology-based representation of process plan,are utilized in the proposed scheduler.The scheduler acquires the dispatching rule from the knowledge base and uses the build-in on-line simulator to evaluate the obtained rule.These technologies enable the scheduler to improve its fine-tune ability and effectively transfer process information into other heterogeneous information systems in a shop floor.The effectiveness of the suggested structure will be demonstrated via its application in the scheduling system of a manufacturing enterprise.
Due to the complex, uncertainty and dynamics in the modern manufacturing environment, a flexible and robust shop floor scheduler is essential to achieve the production goals. A design framework of a shop floor dynamical scheduler is presented in this paper. The workflow and function modules of the scheduler are discussed in detail. A multi-step adaptive scheduling strategy and a process specification language, which is an ontology-based representation of process plan, are utilized in the proposed scheduler. The scheduler acquires the dispatching rule from the knowledge base and uses the buildin on-line simulator to evaluate the obtained rule. These technologies enable the scheduler to improve its fine-tune ability and effectively transfer process information into other heterogeneous information systems in a shop floor. The effectiveness of the suggested structure will be demonstrated via its application in the scheduling system of a manufacturing enterprise.
基金
National Defense Fund(No.20030119)
NSFC(No.60775060)
the Foundation Research Fund of Harbin Engineering University(No.HEUFT07027)
