A Multi-Level, Control-Theoretic Framework for Integration of Planning, Scheduling and Rescheduling

摘要

In this paper, an integrated multi-level, control-theoretic framework has been proposed for effectively handling integration of planning, scheduling and rescheduling. The overall problem is decomposed into three levels with different horizons; each level has an abstraction of the lower level, with the philosophy of decentralized decision making and the flexibility and amenability to rescheduling. The main feature of the proposed framework is the integration of reactive scheduling that is motivated by some of the process control principles like cascade control and the concepts of receding horizon. An illustrative case study of a simple refinery flow sheet involving continuous lube production in a hybrid flowshop is presented.