基于最小二乘原理的叶片同步振动参数辨识技术研究

Parameters Identification of Synchronous Blade Vibration Based on the Principle of Least Squares

准确对叶片振动参数进行辨识,对于叶轮机械避免共振至关重要。介绍了国内外叶片振动参数辨识技术发展情况和最小二乘原理,阐述了叶片振动参数测量系统的工作原理。通过在叶片机匣上安装不少于4支叶顶传感器,基于最小二乘原理,分析处理了叶片振动测量系统的严重欠采样数据,成功对叶片同步振动参数进行了辨识。

It is vital to identify the rotating blade vibration parameters for avoiding resonance. The development of the blade vibration parameter identification technique in the domestic and foreign and the principle of least squares are introduced. The working principle of the blade vi- bration parameters measurement system is described. Based on the principle of least square, the vibration data is processed by not less than four sensors installed at blade casing. Then the synchronous blade vibration parameters are successfully identified.