Analysing stability of an automated transit network vehicle at Y-junction based on multi-body dynamics simulation

Eco-friendly vehicles are being developed to reduce carbon emissions and address global warming. The solar powered automated rapid transit ascendant network (SPARTAN) Superway project at San José State University focuses on an automated transit network (ATN) powered by solar energy. ATN vehicles, with a unique cabin-below-track configuration and distinct steering system, face dynamic challenges, particularly at Y-junctions and curved guideways. This study employs multi-body dynamic simulation to analyse the behaviour of a prototype ATN vehicle under these conditions. Significant lateral forces and reaction spikes at Y-junctions were identified as risks to stability and passenger safety. A design improvement adding a rear bogie steering mechanism is proposed, effectively mitigating impact loads and stabilising lateral accelerations. Consequently, this study underscores the need for tailored dynamic analyses for structurally unique systems like ATN vehicles, ensuring safety, improving reliability, and advancing sustainable urban transit networks.