Modeling and modal responses analysis of an unmanned small-scaled gyroplane

This paper presents aerodynamic analysis of an unmanned small-scaled gyroplane with a rotor having cyclic pitch system. A comprehensive nonlinear model is derived for it which involves force and moment generation mechanism for the flying vehicle. The nonlinear model is linearized with approximations and deduced on a prescribed flight condition. Our gyroplane dynamic modal response is further reconfigured and reveal its differences associations among helicopters and classic autogiros. A study is performed to investigate the effect of forward flight speed and center of gravity (CG) placement on modal response. The results suggest an appropriate CG location to reduce instability.