基于拉格朗日方程的倾转旋翼机动力学建模

针对倾转短舱与机体间的气动干扰和惯性耦合特征,基于拉格朗日原理推导出了倾转旋翼机的纵向飞行动力学方程。在此基础上,以XV-15倾转旋翼机为对象,针对几种不同的短舱倾角,计算分析了飞行器的配平特性和过渡模式动态响应特性。仿真结果表明,所建立的动力学模型是合理的。该模型可用于研究倾转旋翼机的直升机飞行模式、飞机飞行模式及过渡飞行模式下的纵向飞行特性。

Flight dynamics modeling of tilt rotor aircraft based on Lagrange equation

In this paper, in consideration of aerodynamic disturbance and inertial coupling, longitudinal dynamics model of the tilt rotor aircraft were built based on the principles of Lagrange equation.Moreover, took the XV-15 tilt rotor aircraft as an example, the trim characteristics and the dynamic characteristics of transition mode were calculated and analyzed with several different nacelle angles.The simulation results show the validity of model and the rationality of results.Furthermore, the model can be used to study the longitudinal flight characteristics of helicopter mode, aircraft mode and transition mode.