基于无转速定位信号的非接触叶片振动测试技术

Vibration Measure Technique of Non-contact Blade Based on No Rotate Speed Location Signal

介绍了在无转速定位信号情况下实现非接触叶片振动测试的方法,通常定位传感器安装于发动机转子部件内,存在传感器脱落打伤发动机的隐患。对此,开展了双光纤信号替代转速定位信号实现叶片振动测试方法的研究。运用单自由度理论分析了无转速定位的测量原理,分析了在无转速定位时对叶片振动测量误差的影响。该方法通过了模拟试验器和台架压气机试验验证。结果表明:无转速定位非接触叶片振动测试方法与转速定位方法的测试结果基本一致,为发动机工作叶片安全监视提供了更为简易的技术手段。

The measure method of no contact blade vibration was introduced at no rotate speed location signal. The sensor of orientation was usually installed into engine rotor components, which led to the hidden trouble of the aeroengine damage dropped sensor. The blade vibration test method of double fiber signal replaced rotate speed signal were investigated. The measure principle of no rotate speed signal was analyzed by the single freedom theory. The influences of blade vibration test error were analyzed at no rotate speed location. The method was validated by simulation experiment and compressor testing. The results show that the test results of no contact blade vibration based on no rotate speed location agree with the test results of rotate speed location. It offer the easier technique method to the security monitoring of aereoengine blade.