Integration of Geometric Tolerance Analysis in System Simulations via Functional Mock-up Units

This paper presents a concept for integrating geometrictolerance analysis into system simulations using FunctionalMock-up Units (FMUs). While various methods and tools fortolerance analysis exist in the mechanical domain, there iscurrently no standardized or widely established approachfor their integration into multi-domain system simulation.This work proposes a structured FMU interface based on theFunctional Mock-up Interface (FMI) standard, enabling amodular and reusable representation of tolerance behaviour.The concept is demonstrated in a case study, in which anFMU for static tolerance calculation was implemented andsuccessfully verified against a commercial analysis tool.Furthermore, the use of the FMU with FMUGym illustrates thepotential of the FMI ecosystem to flexibly combinetolerance models with other simulation environments andanalysis methods.The results demonstrate that FMUs can provide a suitableand tool-independent interface for integrating geometricaltolerance effects into system-level simulations andmodel-based engineering processes.