气体润滑轴承-转子系统碰摩信号能量特征辨识  

On Idenfication of the Energy Feature of the Rub-impact Process in a Gas-lubricated Rotor-bearing System

作　　者：李宇飞[1] 李军[1] 杨金福[2] 陈策[2] 

机构地区：[1]空军工程大学工程学院,西安710038 [2]中科院工程热物理研究所,北京100080

出　　处：《机械科学与技术》2008年第7期927-931,共5页Mechanical Science and Technology for Aerospace Engineering

摘　　要：在气体润滑轴承转子系统稳定性试验中,利用小波包分解,观察了不同频段内的位移振动信号的能量随时间的变化。根据半速涡动频率所在频带与工频所在频带的能量变化趋势,将碰摩过程分为3种状态:稳态,碰摩前的失稳状态和碰摩状态,并给出了碰摩过程状态变化的能量特征。Based on wavelet packet decomposition and energy feature extraction, the energy variety of the vibration signal with time in different frequency bands is investigated in a stability experiment on a high speed rotor and gaslubricated bearings. The change of two frequency bands which contain gas whirl frequency and power frequency can present the process of the system＇s rub-impact, and the system experiences three states： stable state, gas whirl state, and rub-impact state. The energy feature of the rub-impact process is also given.

关 键 词：气体润滑轴承 碰摩 小波包 能量特征 

分 类 号：TH165.3[机械工程—机械制造及自动化]