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We describe a generic routing controller for nonlinear flow shops, and the respective design and verification tool based on coloured timed Petri nets. The design methodology integrates logical and performance-related control for discrete event systems by introducing a time invariant process V. V stands for the cycle time of a repetitive production system and for the stationary sequence of transport...
This paper presents a framework for designing universal schedulers for real-time systems on uniprocessors based on supervisory control theory (SCT) for discrete-event systems. A universal scheduler nondeterministically selects a task for execution in such a way that all timing constraints are met in a minimally restrictive fashion, while it contains all feasible deterministic scheduling policies
In this work we proceed to the modeling of an electric power transmission system, using hybrid input/output automata (HIOA), based on a framework presented in our previous work. The system is assumed to consist of several distinct components. Some of them such as loads drive the continuous dynamics while others such as protection devices exhibit event-driven discrete dynamics. Such behavior is characterized...
Design of precision and safety-critical applications usually adopts time-triggered protocols as the communication infrastructure to achieve real-time performance. Due to the event-triggered nature of the controller area network (CAN), some modified time-based protocols are proposed for the CAN bus like TT-CAN and FTT-CAN. This paper proposes a CAN-based motion control system by introducing the event-time...
In this paper, we present an approach for robust supervisory control of discrete event systems. In the proposed approach, we assume that the current state is known only to be within a nonempty subset of the system states. We extend the definition of discrete event system controllability to take into account such uncertainty about the current state. We show that if the system behavior can be traced...
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