Modeling and Analysis of Deformed Parafoil Recovery System

The aerodynamic calculation of parafoil is the key technology of the parafoil recovery system modeling. In order to further improve the model accuracy, the lift coefficient and drag coefficient under the various states are obtained via fluid structure coupling method by considering the influence of the aerodynamic deformation and trailing edge deviation. Then, the least square method is used to identify the quantitative relationship among the aerodynamic coefficient, deflection, and deformation so as to improve the 6-DOF parafoil recovery system model. The results show that the structure of parafoil considering deformation and deflection is not only similar to the actual parafoil, but also the obtained aerodynamic parameters are more close to the wind tunnel test, which proves that the present method has certain significance for precisely modeling the parafoil recovery system.