翼扇涵体构型无人机风切变下的响应特性

为了分析风切变影响下的响应特性,首先根据翼扇涵体无人直升机的构型特点,建立了该型直升机在风切变场中的非线性飞行动力学模型,依据美国联邦航空局的统计数据,给出了典型的风切变模型,最后研究分析了翼扇涵体构型无人直升机在不同维数风切变场中的响应特性,以及弹性支承件对该构型直升机抗风特性的影响。研究结果表明:翼扇涵体构型无人直升机受高维数的风切变影响较大;以提高操纵性为目的弹性支承件降低了该构型无人直升机的抗风能力,因此在对弹性支承件的刚度进行设计时,需要综合考虑其对操纵性与抗风特性的影响。

Research of Wind Shear on Response Characteristics of Rotor/Ructed-fan Unmanned Helicopter

In order to analyze response characteristics influenced by wind shear, first the nonlinear flight dynamic model of rotor/ducted-fan unmanned helicopter in wind shear is built based on the configuration characteristics of this helicopter. Then, according to the statistic data of Federal Aviation Administration, the classical wind shear model is given. Finally, response characteristics of rotor/ducted-fan unmanned helicopter is studied and analyzed in different dimension wind shear, and the effect of elastic supporting device on wind-resistance of this helicopter is also done. The research results are shown that rotor/ducted-fan unmanned helicopter is impacted more by high dimension wind shear. The elastic supporting device can improve the dirigibility, but it also reduces the ability of wind-resistance of the rotor/ducted-fan unmanned helicopter, so the effect of elastic supporting device on dirigibility and wind-resistance should be considered comprehensively while it is designed.