飞控系统与直升机振动耦合分析及验证  

Analysis and verification of the coupling between FCS and helicopter

作　　者：王文涛[1] 查建平[1] 孟文杰[1] WANG Wentao;ZHA Jianping;MENG Wenjie(China Helicopter Research and Development Institute,333001 Jingdezhen,China)

机构地区：[1]中国直升机设计研究所,景德镇333001

出　　处：《应用力学学报》2023年第6期1277-1282,共6页Chinese Journal of Applied Mechanics

摘　　要：飞控系统与直升机之间产生耦合,会诱发或加剧直升机振动。国内对飞控系统与直升机耦合产生的振动问题认识较少,缺乏系统的介绍,出现相关问题时往往需要从各个方向逐步排查,花费大量的人力和时间,影响研制进度。本研究从直升机振动的角度出发,阐述了飞控系统与直升机之间耦合的两种模型,以此对耦合产生的振动问题进行分类,并对两大类问题的典型频率特征进行分析,对耦合问题的机理及关键影响因素进行归纳总结。针对飞控系统与直升机相互耦合后产生的振动问题,提出了一般的解决措施。以某型号直升机实际问题为例,说明飞控系统与直升机相互耦合后产生的振动问题的严重性,进一步分析飞控系统与直升机相互耦合的关键途径及影响的频率范围,同时证明了所提出的一般解决措施的有效性,可以为飞控系统与直升机相互耦合产生的振动问题快速处理提供借鉴。The coupling between flight control system(FCS)and helicopters can induce or aggravate the vibrations of the helicopter.For the lack of systemic understanding of the problems at home,much more human resource and time have been wasted to do some troubleshooting from the beginning when the vibration problems caused by coupling between FCS and helicopter appear,thus delaying the model development progress.In this paper,two coupling models between FCS and helicopters are presented from the perspective of helicopter vibrations,according to which two categories are formed and the frequency characteristics are analyzed.The mechanisms as well as the critical factors in the interconnection are summarized.Aiming at two coupling paths,general resolutions are addressed to avoid the vibration problems caused by coupling between FCS and helicopters.Further analyses are made of the critical pathway and the associated frequency range,based on a practical problem of a certain helicopter model,which indicates the severity of the problem caused by coupling between FCS and the helicopters.The results prove the effectiveness of the resolutions presented,and can serve as the reference for dealing with the analogous vibration problems caused by coupling between FCS and helicopters.

关 键 词：直升机 振动 飞控系统 耦合振荡 

分 类 号：V21[航空宇航科学与技术—航空宇航推进理论与工程]