基于智能变距拉杆的旋翼平衡实时调整方法  

Real Time Adjustment Method of Rotor Balance Based on Smart Pitch Rod

作　　者：黄林然 孙灿飞 赵英梅 彭德润 胡斌 程攀 莫胜波 HUANG Linran;SUN Canfei;ZHAO Yingmei;PENG Derun;HU Bin;CHENG Pan;MO Shengbo(AVIC Shanghai Aero Measurement Controlling Research Institute,Shanghai 201601,China;Aviation Key Laboratory of Science and Technology on Fault Diagnosis and Health Management,Shanghai 201601,China;AVIC Lanzhou Flight Control Co.,Ltd.,Lanzhou 730070,China)

机构地区：[1]航空工业上海航空测控技术研究所,上海201601 [2]故障诊断与健康管理技术航空科技重点实验室,上海201601 [3]航空工业兰州飞行控制有限责任公司,兰州730070

出　　处：《南京航空航天大学学报》2023年第2期186-192,共7页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：旋翼不平衡是造成直升机振动的重要原因,而传统旋翼平衡调整是一种定期维护方法,耗时长且无法长时间保持维护后的振动水平。本文研制了一套基于智能变距拉杆的旋翼平衡实时调整(In flight tuning,IFT)系统,可以根据计算机发出的数字指令控制智能变距拉杆长度实现桨叶变距输入,进而完成旋翼动平衡调整。试验发现智能变距拉杆杆端位移量对旋翼转频振动分量的影响呈线性规律,由此确定拉杆调整系数矩阵。当获取旋翼不平衡振动信息后,根据相位选择相应拉杆作为调整器,根据振幅在调整矢量方向投影的大小关系设计了调整策略,得到拉杆完成平衡调整所需的位移量。通过旋翼塔试验验证了该方法的有效性,结果表明该方法可以在直升机飞行过程中实时降低旋翼振动水平,有效提高了旋翼动平衡调整效率。Rotor imbalance is an important cause of helicopter vibration.The traditional rotor balancing adjustment is a periodic maintenance method,which takes a long time and cannot maintain the vibration level after maintenance for a long time.Therefore,an in light tuning(IFT)system based on smart pitch rod is developed,which can control the length of smart pitch rods according to the digital command sent by the computer,realize the variable pitch input of blade,and then complete the rotor dynamic balance adjustment.It is found that the influence of the displacement of the smart pitch rod end on the rotation frequency vibration component is linear.Thus the adjustment coefficient matrix of smart pitch rod is determined.When the rotor unbalance vibration information is obtained,the corresponding rod is selected as the regulator according to the phase,the adjustment strategy is designed according to the relationship between the amplitude projection in the adjustment vector direction,and the displacement required for the tie rod to complete the balance adjustment is obtained.The effectiveness of this method is verified by rotor tower test.The results show that this method can reduce the rotor vibration level in real time during helicopter flight,and improve rotor dynamic balance adjustment efficiency.

关 键 词：直升机振动 旋翼平衡实时调整系统 智能变距拉杆 旋翼塔试验 

分 类 号：TB53[理学—物理]