Analysis of Multi-Body Nonlinear Dynamic Modeling and Motion Characteristics of Flexible-Wing Aircraft

摘要

Flexible-wing aircraft has more applications than traditional parafoil system for its superior flight performance and height controllability. In consideration of the apparent mass of parafoil and the relative motion between two bodies, an eight degrees of freedom (DOF) nonlinear dynamic model is proposed against the special structure of two-point flexible connection of the flexible-wing aircraft, including six DOF of parafoil and two relative motion DOF of payload. The simulation emphasizes on the analysis of the model's relative motion of turning, flare landing and responses to thrust and wind disturbances. The result shows the flexible-wing aircraft is subjective to wind disturbance and the control may cause varying degrees of relative motion between two bodies, thereby further verifying model correctness and applicability.