Message-Passing Architecture and its Construction in Object-Oriented Rapid Modeling for Automated Manufacturing System Simulation

Abstract

To develop a simulator for automated manufacturing systems using an object-oriented modeling paradigm, we have researched the message-passing architecture and methodology of rapid model construction. For the message-passing methodology, we propose a modified hierarchical control architecture, modified to allow signal paths between adjacent job flow-connected resources. Model libraries using the proposed architecture have been described zwith DEVS formalism and have been implemented based on DEVSim++ so that they support the hierarchical and modular concept. In order to support the rapid modeling concept, we have designed a prototype simulator in which the entire message-passing architecture is constructed from limited and partial information in order to reduce modeling overload for users. By showing a sample modeling procedure of a system, we demonstrate the interesting features of the developed simulator.

Expressiveness of verifiable hierarchical clock systems

“…He also made DEVS's dynamics clear by comparing other fundamental dynamic systems such as the differential equation system and the discrete time system using the general system theory in his first book. In the 1980s the hierarchical and modular modelling functionality was added to DEVS (Zeigler, 1984) so that the user builds DEVS models in gradually (Sargent et al, 1993) or rapidly (Hwang and Choi, 1999). In early 1990s, a hybrid model, called DEV& DESS, has been proposed as the combined form of DEVS and the differential equation system (Praehofer, 1991;Praehofer et al, 1993).…”