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Vol: 52(66) No: 1 / March 2007 A General Untimed Petri Net Model for a Node with n Inputs and m Outputs Component of Automatic Transport Systems with Accumulation Areas Dan Ungureanu-Anghel Department of Automation and Applied Informatics, "Politehnica" University of Timisoara, Faculty of Automation and Computers, Bd. Vasile Parvan No. 2, 300223 Timisoara, Romania, phone: +40-(0)-256-403.211, e-mail: dan.ungureanu@aut.upt.ro Keywords: automatic transport systems with accumulation areas, nodes, Petri net, positions, transitions, arks. Abstract The analysis of the discrete events systems and particularly of automatic transport systems with accumulation areas using the Petri nets starts from the remark that the refining of internal operations is extremely useful in the case of modeling such systems. The aim of this paper is to establish a generals Petri net model for a nod with “n” input and “m” outputs, based on basic elements of the automatic transport systems with accumulation areas. In this article, untimed Petri nets have been used for modeling, time being not a defining element for this modeling. References [1] C. G. Cassandras and S. Lafortune, „Introduction to Discrete Event Systems”, Kluwer Academic Publishers, 2001, Boston. [2] O. Pastravanu, „Sisteme cu evenimente discrete. Tehnici calitative bazate pe formalismul retelelor Petri”, Editura MatrixRom. 1997, Bucuresti. [3] D. Ungureanu-Anghel and O. Prostean, “Modeling the Basic Components of Suspended Transport Systems Using Sequential Automata”, Proceedings of the 7th International Conference on Technical Informatics – CONTI`06, Vol. 1 Automation and Applied Informatics, Timisoara, 8-9 June, 2006, pp.77 – 80. [4] D. Ungureanu-Anghel and O. Prostean, “Modeling the Basic Components of Suspended Transport Systems with the Help of Untimed Petri Nets”, Proceedings of the 7th International Conference on Technical Informatics – CONTI`06, Vol. 1 Automation and Applied Informatics, Timisoara, 8-9 June, 2006, pp.71 – 76. [5] D. Ungureanu-Anghel, “Modelling the basic components of automatic transport systems with accumulation areas using sequential automata converted in Petri nets”, SCIENTIFIC BULLETIN of “Politehnica” University of Timisoara, ROMANIA, Transactions on AUTOMATIC CONTROL and COMPUTER SCIENCE, Vol. 51 (65), No. 3, 2006. [6] D. Ungureanu-Anghel, “Two general untimed Petri net models for the basic components of automatic transport systems with accumulation areas”, SCIENTIFIC BULLETIN of “Politehnica” University of Timisoara, ROMANIA, Transactions on AUTOMATIC CONTROL and COMPUTER SCIENCE, Vol. 51 (65), No. 4, 2006. |