无参考传感器叶端定时叶片同步振动参数辨识方法研究  

Research on Blade Synchronous Vibration Parameter Identification Using Blade Tip Timing without the once per Revolution Sensor

作　　者：周畅祎 胡海峰[2] 杨拥民[2] 官凤娇 徐海龙 ZHOU Changyi;HU Haifeng;YANG Yongmin;GUAN Fengjiao;XU Hailong(Low Speed Aerodynamics Institute, China Aerodynamic Research and Development Center, Mianyang 621000;Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410073)

机构地区：[1]中国空气动力研究与发展中心低速空气动力学研究所,绵阳621000 [2]国防科技大学装备综合保障技术重点实验室,长沙410073

出　　处：《机械工程学报》2019年第13期64-71,共8页Journal of Mechanical Engineering

基　　金：国家重点基础研究发展计划资助项目(973计划，2015CB057400)

摘　　要：叶端定时(Blade tip timing,BTT)是一项具有应用前景的非接触式叶片振动在线监测技术,已有的BTT测量系统需要配备参考传感器来测量转速和提供时间基准。但航空发动机结构复杂及安装空间等限制,造成参考传感器安装困难,导致现有的BTT测量方法无法正常使用。针对无参考传感器叶片同步振动BTT测量及参数辨识方法展开研究,基于改进双参数法,在利用三个BTT传感器进行测量的条件下,对叶片振动位移差进行分析处理即可完成叶片同步振动幅值和倍频(Engine order,Ne)的辨识。结合数值仿真分析及试验研究的手段,将该方法与双参数法进行对比分析。结果表明,该方法能够准确辨识出叶片的振动参数,验证了其可行性和有效性,为无参考传感器BTT测量的工程应用提供了技术手段。Blade tip timing (BTT) is considered a promising technique for monitoring blade vibration online for aero-engine. The majority of BTT measurement and analysis systems require a once-per revolution (OPR) sensor to generate a timing reference and measure the rotating speed of blades. However, one of the challenges in the development of BTT technique is that it's extremely difficult to install the OPR sensor and that the installation of the OPR sensor may cause potential security risks, leading to the failure of the existing BTT measurement. The method of synchronous vibration parameters identification, called two parameter plot method, is improved by mounting an additional BTT sensor and the amplitude and engine order (Ne) of blade vibration can be identified through analyzing the vibration displacement change. By numerical simulation and experiments, the results of vibration parameters identification are analyzed, which show validity and feasibility of the arithmetic. The work provides technology means of BTT measurement without the once per revolution sensor.

关 键 词：叶端定时 叶片同步振动 参考传感器 叶片振动参数辨识 

分 类 号：TH17[机械工程—机械制造及自动化] O329[理学—一般力学与力学基础]