Bond graphs for technico-economic approach of production systems modeling

Bond graphs have been successfully used to describe physical systems. In this paper, we extend their application to modeling of production systems with a technico-economical point of view. The aim of this work is to obtain a modeling and decision aid tool to study and to control dynamic production systems. The considered production system consists of a set of workstations, each workstation is composed of a machine and a stock. The representation of workstations with Bond graphs is based on the correspondence between system state variables and the power and energy variables of Bond graphs. A product storage zone is represented by a C-element, a machinning ressource is represented by an R-element, the flows of parts among workstations are controlled by now source elements. The simulation of a production system example is used to validate proposed approach. And different situations as machine failure and periodic purchase of primary materials, are studied