小型涵道飞行器悬停状态动力学建模研究

针对小型涵道飞行器介于直升机和固定翼飞机之间独特的结构特点和控制特性,对小型涵道飞行器在悬停状态下的动力学进行分析,结合刚体动力学和空气动力学对飞行器所受力和力矩进行推导,并建立动力学模型.同时对模型零动态的渐近属性进行研究,得出飞行器物理参数与内动态稳定性的关系,分析结果表明,系统零动态的指数不稳定性不仅受到控制舵压心到飞行器质心距离的影响,同时也和螺旋桨的陀螺惯量有关.

Dynamic Modeling of Miniature Ducted Fan Aircraft in Hovering State

According to the unique structure features and control characteristics of the miniature ducted fan aircraft, that are situated between helicopters and fixed wing aircraft, the dynamics of the miniature ducted fan aircraft in hovering was analyzed. Based on the theories of rigid body dynamics and aerodynamics, the equations of force and moment acting on the aircraft were deduced and its kinetic model was established. Meanwhile, the zero dynamics of the model and its asymptotic properties were investigated to find the relationship between the aircraft physical parameters and the in-dynamic stability. The results show that the exponent instability of the system zero dynamics would not only be affected by the distance from the pressure center of control flap to the vehicle mass center, but also be related with the gyroscopic inertia of the propeller.