• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (13): 64-71.doi: 10.3901/JME.2019.13.064

• 特邀专栏:航空发动机健康监测与故障诊断 • 上一篇    下一篇

无参考传感器叶端定时叶片同步振动参数辨识方法研究

周畅祎1,2, 胡海峰2, 杨拥民2, 官凤娇2, 徐海龙2   

  1. 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
  • 收稿日期:2018-08-20 修回日期:2019-03-15 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: 胡海峰(通信作者),男,1980年出生,博士,助理研究员。主要研究方向为状态监控与故障诊断、结构健康监测和现代信号处理方法。E-mail:hhf_online@163.com
  • 作者简介:周畅祎,男,1993年出生。主要研究方向为状态监控与故障诊断。E-mail:zhouchangyi001@163.com
  • 基金资助:
    国家重点基础研究发展计划资助项目(973计划,2015CB057400)。

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

ZHOU Changyi1,2, HU Haifeng2, YANG Yongmin2, GUAN Fengjiao2, XU Hailong2   

  1. 1. Low Speed Aerodynamics Institute, China Aerodynamic Research and Development Center, Mianyang 621000;
    2. Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410073
  • Received:2018-08-20 Revised:2019-03-15 Online:2019-07-05 Published:2019-07-05

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。

关键词: 参考传感器, 叶端定时, 叶片同步振动, 叶片振动参数辨识

Abstract: 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.

Key words: blade synchronous vibration, blade tip timing, OPR sensor, vibration parameters identification

中图分类号: