A hybrid modelling and simulation strategy for process integration and control

The paper describes a framework for the modelling and simulation of hybrid systems and the implementation of the strategy in the real-time Expert System tool, G2. The strategy is predicated on three key notions: hybrid model base, interactions between dissimilar model elements, and hybrid simulation. The combination of a hybrid model structure, incorporating Grafcets, equations, rules and objects, with the real-time features of G2 is shown to be an efficient vehicle for the integration of process functions such as supervisory control, sequential control, scheduling, fault monitoring and optimisation