A Method to Measure Unbalanced Vibration Parameters for Some Twin-spool Aerogines
Under some working conditions for some twin-spool aeroengines, the aeroengine unbalanced vibration composed of high pressure rotor 1-order vibration and low pressure rotor 1-order vibration is of beat signal because the rotate speed difference between high pressure rotor and low pressure rotor is tiny. Its highly difficult to separate the two vibration components with each other in frequency domain because of the severe disturbance in frequency spectrum. This paper discusses a time domain analysis method to solve the problem. The principle to calculate the altitudes and phases of the two vibration components is put forward firstly. Then the method to match the altitude with proper rotor is discussed. At last the influence of sampling rate on precision of altitude and phase is discussed. Experimentation shows that the method can separate the two vibration components exactly.
unbalanced vibration beat signal time domain analysis vibration altitude vibration phase
YANG Xun LEI Yong
School of Power and Energy,Northwest Polytechnical University,Xian, Shannxi, China,710072
国际会议
第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)
重庆
英文
470-473
2009-08-01（万方平台首次上网日期，不代表论文的发表时间）