In: Maler, O.: Lecture Notes in Computer Science, Vol. 1201; HART' 97, Hybrid and Real-Time Systems, Grenoble, France, March 1997, pages 213-227. Springer-Verlag, 1997.
Abstract: This paper presents a new approach for modelling and control of industrial transformation processes for which the dynamics behavior has an hybrid nature, that is to say, when the continuous dynamics interacts closely the event-driven evolution of the system. This methodology called hybrid flow nets is based on Petri Nets interacting with what we called Continuous Flow Nets and that can be seen as an continuous version of Petri Nets with an evolution rule defined by a continuous non linear differential equation. In this work, we address the problem of controlling the flow through a continuous transition and propose an hybrid controller for keeping this flow within some specified bounds. The proposed methodology has been used to design the control system of a real industrial process used for the filtration in the production of beer.
Keywords: hybrid flow nets, industrial applications, process control.