Modelo integrado reativo a perturbações em tempo real da programação da produção e controle avançado para um CSTR
Abstract
Scheduling and Process Control layers traditionally operate independently in the production
process in the process industry. Both the Academy and Industry have been making efforts so
that the integration of these layers of decision offers alternatives for improvement in the
productive process, while generating better operational results. In particular the determination
of optimal product sequencing is sensitive to the transition times obtained from the control
layer, which in turn are strongly dependent on the continuous process variables of a chemical
plant. In addition, sequencing is also sensitive to (external) demand disturbances occurring in
the Scheduling layer, and disturbances (internal) in the process variables, which occur in the
control layer. Process perturbations can be characterized by fluctuations in the properties of raw
materials or in variations in feed rates. Demand disruptions can be characterized by urgent
requests or cancellation of orders. These disturbances may imply rescheduling. The
contribution of this work is the development of an integrated model of Scheduling and
Multilayer Control adopting the DMC control strategy for a CSTR multiproduct chemical plant.
In the review of the literature, no integrated model of Scheduling and Advanced Multi-layered
Real-Time Decision-Making for the treatment of demand and process perturbations of a CSTR
chemical plant that generated rescheduling was found. Results of the computational simulation
of scenarios of the model with several products in a hypothetical chemical plant allow to
confirm the viability of its application.