磁流变减摆器对直升机空中共振的影响分析  

Effects of Magneto-Rheological Damper on Helicopter Air Resonance

作　　者：卫丽君[1] 李书[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《振动．测试与诊断》2013年第6期981-986,1093,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：国家高技术研究发展计算("八六三"计划)资助项目(2012AA112201);航空科学基金资助项目(20100251007);国家自然科学基金资助项目(10772013);中央高校基本科研业务费专项资金资助项目

摘　　要：为了研究磁流变减摆器对直升机空中共振的影响,建立了适用于直升机空中共振稳定性的磁流变减摆器模型,前飞状态下动力入流模型采用Pitt/Peters理论模型,与直升机旋翼/机体耦合动力学方程组联立,采用simulink时域仿真的方法计算得到各自由度、各阶模态随时间的变化曲线、配平和激振时摆振角及其频谱、摆振后退型模态振幅包络线及其阻尼。分析了磁流变减摆器对直升机空中共振动稳定的影响,对比了不同电压下磁流变减摆器对桨叶挥舞摆振运动的影响。结果表明:磁流变减摆器施加不同电压可得到不同的阻尼力,利用该性质可以更好地抑制直升机空中共振现象。In order to investigate effects of magneto-rheological damper on helicopter air resonance,a magneto-rheological(MR)damper model for helicopter air resonance is developed in this paper.Simulation of this model is performed by integrating the designed MR damper model to the equations including dynamic inflow model under forward flight based on Pitt/Peters and dynamic equations of helicopter rotor/body coupling.Simulink is used to simulate the overall system and the time-varying curves of each degree of freedom and rank's mode,lag angle and frequency spectrum under trim and impulse,and amplitude envelope curves and damping of lag mode are obtained.Influences of MR damper on dynamic stability of helicopter air resonance and on rotor flap and lag under different voltages are analyzed.The results show that different voltages imposed on MR damper lead to different damping force,which can be used to suppress helicopter air resonance more efficiently.

关 键 词：空中共振 动稳定性 磁流变减摆器 时域 挥舞摆振运动 

分 类 号：V212.5[航空宇航科学与技术—航空宇航推进理论与工程] V214.42