01.1 - Aircraft Design and Integrated Systems (Theory, Methods and Tools)

MODELLING COUPLED ON-BOARD SYSTEMS IN AIRCRAFT DESIGN

E. Espinosa-Juárez¹, A. Dell'Amico¹; ¹Linköping University, Sweden

The entrance of More Electric Aircraft (MEA) architectures represents a paradigm shift that enables new design degrees of freedom and higher levels of integration. However, these On-Board Systems (OBS) have effects where the change on a single component has effects that propagate to other subsystems. Analyzing OBS in isolation during the aircraft conceptual design process fails to capture these cascading effects and risks achieving an unbalanced overall aircraft architecture. This study aims to model and understand on-board systems interactions and cascading effects in a fighter aircraft and their impact on top-level aircraft measures of performance. To achieve this, an Architecture and an Analysis Architecture model are developed using SysML v2. The Architecture model represents the physical aircraft, and the Analysis Architecture represents the models needed for its simulation. A process model is also presented to integrate OBS sizing with overall aircraft sizing. Analyzing and sizing OBS early in the design stage considering cascading effects enables more balanced architectures, improving trade-off decision making, and reduced risk of costly late-stage redesign.

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DOI: 10.71945/icas2026_0201