[Co-Modeling for Cyber-Physical Systems Co-Simulation]In the these last years, systems engineering has became one the major research domain. The complexity of systems has increased constantly and nowadays a category of particular interest are systems composed by a cyber parts that monitor and control some physical processes, called Cyber-Physical Systems (CPS). Their develop and simulation are both complex due to the importance of the interaction between the cyber and the physical entities: there are a lot of models written in different languages that need to exchange information among each other. Normally people use an orchestrator that takes care about the simulation of the models and the exchange of informations. This latter is developed manually and this is a tedious and long work. The proposition of the team is to achieve to generate the orchestrator automatically through the use of Co-Modeling, i.e. modeling the coordination. Before to achieve this ultimate goal, it is important to understand the mechanisms and de facto standards that could be used in a co-modeling framework. In this internship we have studied the use of a technology employed for co-simulation in the industry: FMI. In order to better understand the FMI standard, we realized an automatic export, in the FMI format, of the models realized in an existing software for discrete modeling: TimeSquare. We also developed a simple physical model in the existing open source openmodelica tool.