Comparing the Predictive Event Handling Algorithm LookAhead to Rollback and Early Return

LookAhead is a lightweight algorithm that improves eventhandling in co-simulation by predicting events andadjusting the communication step size beforehand. Itoperates without requiring subsystem event handlingcapabilities. This paper compares LookAhead with otherevent handling methods, namely Rollback and Early Return,from the perspective of performance and applicability.Results from the presented example show that LookAheadperforms on par with iterative co-simulation methods and isparticularly well-suited for handling shared state events. Author(s): Felix Tischer, Simon Genser, Daniel Watzenig, Martin Benedikt © 2025 Felix Tischer, Simon Genser, Daniel Watzenig, Martin Benedikt Link to paper: https://doi.org/10.3384/ecp218663 Conference website: https://modelica.org/events/modelica2025/ Modelica Association: https://modelica.org/