降速自转旋翼-机翼复合飞行器飞行特性研究  

Research on the flight characteristics of a slowed rotor compound aircraft

作　　者：林清 刘慧英[1] 刘娟霞 刘菊红 LIN Qing;LIU Huiying;LIU Juanxia;LIU Juhong(School of Automation,Northwestern Polytechnical University,Xi’an 710129,China;China Aviation Industry General Aircraft Co.,Ltd.,Zhuhai 519040,China)

机构地区：[1]西北工业大学自动化学院,陕西西安710129 [2]中航通用飞机有限责任公司,广东珠海519040

出　　处：《飞行力学》2021年第5期31-37,70,共8页Flight Dynamics

摘　　要：以某型降速自转旋翼-机翼复合布局飞机为研究对象,给出了其七自由度全量数学模型框架。基于数值叶素积分法给出了自转旋翼的建模方法,并与风洞试验数据对比验证了模型合理性;分析了旋翼卸载机理并给出了卸载配平策略;采用"飞行中配平法"完成了平衡特性的解算,并分析了典型运动模态特性随空速的变化。研究表明,降低总距可以有效降低旋翼转速与旋翼拉力,但会引起旋翼气动特性的快速、大幅度变化,因此要求控制律需具备快速适应能力与较强的鲁棒性。研究结果为该类构型飞机的控制律设计与仿真提供了有益参考。Focusing on the slowed rotor compound aircraft, an example aircraft was introduced. A full mathematical model framework with seven degrees of freedom was derived. Based on the numerical blade element method, the autorotating rotor was modeled. The rotor model method was verified by comparing with the wind tunnel experimental data. The mechanism of unloaded rotor was analyzed and the trim strategy was given accordingly. The fly-to-trim method was adopted to calculate balance characteristics and typical dynamics modes were analyzed with airspeed. Research show that reducing the collective pitch can effectively reduce the rotor speed and thrust, but it will cause drastic changes in the aerodynamic characteristics of the rotor. Therefore, the multimode control law needs to have a rapid adaptability and a strong robustness. The work on flight dynamics characteristics provides a good basis for the flight control design and simulation of SRC aircraft.

关 键 词：降速自转旋翼-机翼复合式飞机 数值叶素积分法 旋翼卸载 模态分析 

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] V249.1