一种新构型变转速共轴直升机的垂向-航向辨识  

Vertical-course Identification of Variable Rotor-speed Coaxial Helicopter

作　　者：王子琪 WANG Ziqi(China Helicopter Research and Development Institute,Jingdezhen 333001,China)

机构地区：[1]中国直升机设计研究所,江西景德镇333001

出　　处：《直升机技术》2023年第3期9-15,共7页Helicopter Technique

摘　　要：在飞行试验中发现,变转速共轴直升机垂向-航向存在较强烈的耦合。针对变转速共轴直升机D-07悬停状态下的垂向-航向状态空间模型,进行了扫频飞行试验,并对飞行试验数据进行了基于遗传算法的频域辨识工作。根据变转速共轴直升机的气动模型得到了状态空间系数的估计值并确定了搜索域,得到了满足时域验证的状态空间模型。进一步分析状态空间模型,提取气动导数,并对其加以分析。从分析结果可以看出,变转速共轴直升机航向操纵与垂向运动存在耦合,并且相比于传统共轴直升机,耦合效果更强。垂向操纵对航向运动的耦合较小,一般可以忽略。此外,D-07的垂向和航向运动具有阻尼,有一定的动稳定性。In the practical flight experiment,it is found that there is a strong vertical-course coupling of variable rotor-speed coaxial helicopter.In this paper,based on the vertical-course state-space model of the variable rotor-speed coaxial helicopter D-07 in hover,the swept frequency flight test was carried out and the frequency domain identification based on genetic algorithm was carried out for the flight test data.According to the aerodynamic model of the variable rotor-speed coaxial helicopter,the estimated value of the state-space coefficient was obtained and the search domain was determined.The state-space model satisfying the time domain verification was obtained.Further,the aerodynamic derivative was extracted from the state-space model and analyzed.From the analysis results,it could be seen that there was a strong coupling between course control and vertical motion,and the coupling effect was more intense than that of traditional coaxial helicopter.The coupling of vertical control to course motion was small and could be ignored.The vertical and motion motions of D-07 were damped and had certain dynamic stability.

关 键 词：变转速共轴直升机 系统辨识 飞行动力学 

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]