软翼飞行器多体动力学建模与运动特性分析

Modeling and Motion Analysis of Multi-bodies Dynamic of Unmaned Parafoil Vehicle

软翼飞行器以其优越的飞行性能和应用优势已渐渐成为新型飞行器领域的研究热点。针对软翼飞行器两点柔性连接的特殊结构,考虑软翼附加质量与两体间相对运动,提出了一种八自由度(Degrees Of Freedom,DOF)非线性动力学模型;分别仿真分析了模型在稳定滑翔状态下对马力变化、单侧下偏与双侧下偏操作的响应情况飞行特性,结果表明软翼飞行器的操纵动作会引起两体间不同程度的相对运动,进而验证模型的正确性与适用性。

Unmanned Parafoil Vehicle （UPV） has gradually become a hotspot in the flexible wing vehicle research filed for its superior fight performance and advantages in application. An eight degrees of freedom （DOF） nonlinear dynamic model of UPV in mechanism law was proposed, aiming at the structure characteristics of the two flexible connections, and considering the added mass of canopy and the relative motion of two bodies. The response of model to different levels of thrust changes was simulated and analyzed, pulling a single steering line and pulling the left and right steering lines of canopy symmetrically on the steady state of gliding. The simulation results illustrate that operator will cause the relative motion between two bodies which cannot be ignored, and also verify the validity and utility of model.