An expert system for distillation control design

Abstract An expert system for synthesis of distributed control systems (that is a system of single-input-single-output control loops) for distillation columns is discussed. Knowledge representation for the expert system is examined with particular emphasis on idiomatic control and its relationship to the goal tree—success tree knowledge structure. Execution of the expert system consists of elimination of poor control structures using rules and simple calculations and then proceeding to more intensive calculations terminating with tests using either shortcut dynamic models or detailed simulations if they are available. Efficiency, flexibility and requirements of the expert system are discussed as well as its use for education of control designers, process engineers, operators and students. The resulting expert system shell requirements are discussed.