International audienceThis article presents the performance improvements we obtained on the AltaRica 3.0 stochastic simulator by using profiling techniques and testing it on a benchmark of models. This analysis showed that evaluating guards is one of the most time-consuming part of the execution. A selective update of the guards made it possible to improve significantly the performance. This work is a part of the OpenAltaRica project, which aims at developing a complete set of tools for the high level modeling language AltaRica 3.0

In this article, we present a safety analysis of the case study "Landing Gear" proposed recently by Bonniol and Wiels. This case study mixes both physical (hardware) elements and control (software) elements and is representative of a large class of mechatronics systems. For this analysis, we used AltaRica 3.0 as modeling language and stochastic simulation as analysis tool. This experience sketches a methodology to assess the effects of hazards, failures and uncertainties in mechatronics systems.