基于磁激励和信号无线传输的旋转叶片模态参数测试技术研究

Research on modal parameter testing technology for rotating blade based on magnetic excitation and wireless signal transmission

航空发动机叶片的动态特性关系到航空发动机乃至整个飞机的运行安全,对叶片在旋转状态下进行在线动力学参数测试是确保其安全性的有效手段之一。针对旋转状态的叶片提出了采用非接触磁激励作为激振力,采用WiFi无线传输方式实现叶片振动信号的在线测量和传输的方法。在此基础上,设计出一套可以测量旋转状态叶片动力学参数的非接触磁激励-无线传输的动力学参数测试系统,并进行了相应的试验验证,结果表明该系统使用方便,测量精度好。

The dynamic characteristics of aero-engine blades is related to the safe operation of aero-engines and even the entire air⁃craft.Therefore,it is one of effective means of ensuring security to conduct online dynamic parameters testing of rotating blades.Aiming at such special research object of rotating blades,in this paper,non-contact magnetic excitation is proposed as the exciting force for rotating blades,and WIFI wireless transmission is used to realize the online vibration signals measurement and transmis⁃sion.On this basis,a dynamic parameters measurement system of non-contact magnetic excitation-wireless transmission is de⁃signed to measure dynamic parameters of rotating blades,and the corresponding verification tests show that the system is conve⁃nient to use and has high measurement accuracy,which indicates its high engineering application value.