Research On Flight Dynamic Performance Of New Configuration Of VTOL Aircraft

The researching on a new configuration of V/STOL Aircraft causes people's attention both at home and abroad. It not only has the capability of vertical takeoff and landing like a helicopter but also cruising at a high speed as fixed-wing aircraft. In this paper, a flight dynamics model of the understudied new VTOL aircraft was established to find the relationship between control and response according to the characteristics of its construction and dynamics. And the validation of the congfigure was verified by trimming and response characteristics calculation. The whole problem had been separated into two parts, the helicopter mode and the plane mode. The non-steady element theory was used to establish the aerodynamic model of the rotor to calculate its force and moment in this paper. The aerodynamic model of the wings, canard, tail and fuselage was based on lifting line theory. The aerodynamic interference problems were mainly considered such as the canard and the rotor, the fuselage and the rotor. Finally, motion equations were established based on the characteristics of the new configuration of VTOL aircraft. According to the theoretical model, a few parts of programs were written to calculate the aerodynamic force and moment, and the simulation model was made by MATLAB/Simulink which used to connect these parts to control their running order and priority. After trimming calculation, the response curve to a small disturbance input was calculated to test the simulation model's feasibility and the aircraft's configuration as well. Thus the flight mechanical performance was reflected obviously.