Aeroelastic Load Evaluation During Tiltrotor Transition Using A Comprehensive Mid-Fidelity Approach

Abstract

This study examines the aeromechanics of tiltrotor conversion maneuvers using a coupled simulation approach, integrating the multibody dynamics code MBDyn with the mid-fidelity aerodynamic code DUST. The analytical model is based on the XV-15 tiltrotor with advanced technology blades. The hover and cruise performances of the model are validated against available test data, ensuring accuracy. A generic tiltrotor control system is developed using a nonlinear dynamic inversion control law to simulate transient conversion maneuvers. The investigation includes time histories of vehicle dynamics, rotor control inputs, rotor flapping, rotor performance, and blade structural loads, providing detailed insights into the behavior of tiltrotor aircraft during conversion.