变距四旋翼飞行特性分析

Flight characteristics of vavirable pitch quadrotor

针对变距四旋翼的飞行特性问题,首先建立了变距四旋翼的飞行动力学数学模型,并对其操纵机理进行了分析;然后,开展了变距四旋翼平衡特性研究,分析了重心位置对平衡特性的影响;最后,开展气动导数及模态分析,进行了空速、迎角、上反效应稳定性等气动导数以及纵向、横向运动模态稳定性对重心位置的敏感性分析。结果表明,重心位置的降低能够显著提升飞行器的稳定性,同时对平衡特性带来不利的影响;通过合适的重心设计,该构型飞行器具有良好的平衡操稳特性及广泛的工业应用前景。

To research the flight characteristics of vavirable pitch quadrotor,a simplify modeling was carried out at first,and analysis it ’s control method.Then,calculate it ’s equilibrium response with different gravity position.The following calculate speed stability derivative,angel of attack stability derivative,dihedral effect,azimuth stability derivative,longitudinal and lateral eigenvalues,and analysis it’s sensitive to the position of gravity.The results show that the lower position of gravity can improve stability but negatively equilibrium response.This kind of vehicle can get favorable flight characteristics with suitable position of gravity,and has a broad prospect in industrial application.