共轴刚性旋翼飞行器配平特性及验证

针对共轴刚性旋 翼与常规旋翼的区别，从挥舞运动、变距操纵和诱导速度3方面建立共轴刚性旋翼的气动力模型。采用等效挥舞运动概念，建立共轴刚性旋翼的挥舞运动方程;引入提前操纵角概念，建立与共轴刚性旋翼挥舞频率相适应的变距操纵模型；引入上下旋翼干扰因子，建立共轴刚 性旋翼的诱导速度模型。在此基础上，建立共轴刚性旋翼飞行器飞行动力学模型，并以XH-59A 直升机为例计算纯直升机飞行模式的配平特性，使用飞行试验数据验证了理论模型的正确性，同时讨论了共轴刚性旋翼飞行器与常规直升机配平特性的异同点。

Trim Characteristics and Verification of Coaxial Rigid Rotor Aircraft

Aiming at the difference between the coaxial rigid rotor and the conventional rotor, the aerodynamic models of coaxial rigid rotor are built in terms of rotor flapping, pitch control and induced velocity. The flapping movement function of the coaxial rigid rotor is introduced based on the concept of equivalent flapping. The pitch control motion fitting with the flapping frequency of coaxial rigid rotor is modeled based on the concept of control phase angle. The induced inflow velocity of the coaxial rigid rotor is modeled by using the interference factor. With the flight dynamic models mentioned above, the trim characteristics of pure-helicopter mode with the example of XH-59A helicopter are analyzed, and the models are verified by the flight test data. Comparison of the trim characteristics between coaxial rigid rotor aircraft and conventional single rotor helicopter is performed.