Article ID: | iaor19991674 |
Country: | United Kingdom |
Volume: | 36 |
Issue: | 7 |
Start Page Number: | 1961 |
End Page Number: | 1976 |
Publication Date: | Jul 1998 |
Journal: | International Journal of Production Research |
Authors: | Wilson J.R., Seifert R.W., Kay M.G. |
Keywords: | vehicle routing & scheduling, simulation: applications |
To analyse an automated guided vehicle (AGV) system operating under selected vehicle routeing strategies, we present a simulation model that can handle an arbitary system layout as well as arbitrary numbers of AGVs and pedestrians causing congestion in the system. We introduce a dynamic vehicle routeing strategy based on hierarchical simulation that operates as follows: at the time of each AGV routeing decision in the main simulation, subordinate simulations are performed to evaluate a limited set of alternative routes in succession until the current routeing decision can be finalized and the main simulation resumed. A case study involving a prototype AGV system operating under the control of a global vision system illustrates the advantages not only of this strategy but also of global-vision-based control.