Abstract: The rotor of tiltrotor aircraft acts as common rotor in helicopter mode as well as propeller in fixed-wing airplane mode. In order to research the flight control method for tiltrotor airplane, a mathematics model is developed in this paper. In the model, the modified blade element analysis theory is used to model the rotor, and the modified momentum theory is used to calculate the induced velocity. The simulation is performed with Matlab/Simulink and the result shows that the model contains the basic properties of tiltrotor.

Key words: tiltrotor, blade element analysis theory, momentum theory, gimballed rotor