倾转旋翼机非线性建模及验证  

Nonlinear Modeling and Its Validation for Tiltrotor Aircraft

作　　者：彭程[1] 王新民[1] 陈晓[1] 曹宇燕 

机构地区：[1]西北工业大学自动化学院,陕西西安710129

出　　处：《计算机仿真》2014年第2期54-59,共6页Computer Simulation

摘　　要：关于飞机旋翼动特性建模的研究,针对XV-15倾转旋翼飞行器具有直升机、过渡和固定翼三种工作模态,建模复杂的问题,提出了一种分块建模的方法,使得建模过程更加灵活和简化。机体建模部分,考虑旋翼尾流对机翼、垂直尾翼和水平尾翼造成的滑流干扰以及短舱倾转对飞机转动惯量、惯性积和重心造成的影响,大大提高了所建模型的精确度;旋翼建模部分,对旋翼参数进行无因次化后,利用叶素法进行气动力建模。最后,为验证模型的正确性和有效性,在不同飞行速度下对所建模型进行配平,并将配平的结果与倾转旋翼通用模型做对比。结果表明所建模型能很好的反映倾转旋翼机的飞行特性,为飞行优化控制律研究提供很好的模型基础。In this paper, the block modeling method was provided for the complex problem of modeling XV - 15 tiltrotor aircraft, which has three operating modes of helicopter, transition and airplane. It can make the modeling process more flexible and simplified. In the modeling process of the airframe, the slipstream interference developed by the rotor wake at wing, horizontal stabilizer and vertical stabilizer and the CG（ center of gravity） shift and the mo- ments of inertia change of the aircraft due to nacelle movement were taken into account, which greatly improves the accuracy of the model. In the modeling process of the rotor, after the rotor parameters being dimensionlessed, the blade element theory was utilized to establish the aerodynamic model of the rotor. Finally, in order to verify the cor- rectness and effectiveness of the model, the trimming results of the math model under different flight speeds were compared with that of the Generic Tih - Rotor Simulation （GTRS） model. The comparison result shows that the til- trotor flight characteristics are well reflected by the math modal, providing a good foundation for the following study of the control law of this model.

关 键 词：倾转旋翼飞机 滑流干扰 叶素法 配平 

分 类 号：V212.4[航空宇航科学与技术—航空宇航推进理论与工程]