扭转振动测试的实验研究  

Experimental Study on Torsional Vibration Detection

作　　者：张建勋[1] 罗德扬 

机构地区：[1]昆明理工大学建筑工程及力学系

出　　处：《昆明理工大学学报（理工版）》1998年第1期68-74,共7页Journal of Kunming University of Science and Technology(Natural Science Edition)

摘　　要：扭转振动可以看作是匀速轴转动的相位调制．如果可能从回转轴上取出回转编码信号，在一定条件下，此信号的相位解调就表示轴的扭转振动．进行相位解调的有效方法是使用ＦＦＴ分析仪将实信号变为解析信号，而后将其幅值和相位调制分量分解出来．利用希尔伯特变换技术进行幅、相解调，这在通讯领域应用较为广泛．而将其用于扭转振动的检测和分析，目前来说还不多见．为此，我们设计了一套实验装置，利用相应的设备和开发软件进行了一系列实验，得到了一些数据和结果．由于整个解调过程是数字化的．因而具有精度高、应用范围广、适应性强等一系列传统模拟方法所不可比拟的优点，并摒弃了复杂、昂贵而精度有限的扭振传感器．Tosional vibration can be considered a phase modulation of a uniform shaft speed.If a shaft enclder encoder signal is available the phasedemodulation of this signal indicatds the torsional uibration the shaft FFT analyser is used to construct the analytic signal correspondring to a measured real signal and the amplitude and phase modulation components is to be decomposed.The Hilbert transformation technigue for anplitnde demodulation and phase demodulation is widely applied to communication,But it has mot beem applied sowidely in torsional wibration detection and analysis.So we havi designedan enperiment set-up,using acrresponding eguipment anddevebped software forexperimentation We obtained some datas and results.As all process demodulationis digital,it has the advantage of high precision,widely application,adaptable,which the traditonal way modelling can mot becompoued with throws away torsional vibration transmitter which is complicated,expensive and low precision.

关 键 词：希尔伯特变换 扭转振动 相位调制 测试 实验 

分 类 号：O329[理学—一般力学与力学基础]