Vector Spectrum Analysis Of The Key Technologies And Practice

With the development of technology, the increasing complication of the structure of machinery and its running requirements need accirate real time monitoring, in order to discover the hidden malfunction as soon as possible, identify fault correctly and find out the source of it. But in a long period of time, condition monitoring of the machinery and fault diagnosis are based on the analysis of the signal coming from single channel The vibration of the rotor is a dimensional conception. The signal coming from single channel only reflects the vibration of the rotor in the sensor orientation, so it can't accurately offer integral information. As a result, the reliability of monitoring and diagnosis can't meet the demand of the practice. The key of settling the contradiction is to change status quo that the signal analysis is based on the single channel, and apply bran-new technology, information fusion, in the monitoring and diagnosis.The vector spectrum descends from the combination of multiple sensor information fusion and the rotary theory of rotor and its dynamic characters. Multiple sensor information fusion means the fusion process of dynamic signals with the same source. Through the process, a deal of information of rotor vibration is picked up, accordingly the vibration of rotor can be characterized in ML Therefore, the vector spectrum can radically change the discontented state and make the monitoring and diagnosis accirate much more.In fact, vector spectrum comprises a' series of analysis methods: fundamental vector spectrum, vector power spectrum, vector spectrum that used to analysis stationary signals, and short time vector spectrum to non-stationary signals. Being the base of vector spectrum, fundamental vector spectrum and vector power spectrum are studied detailedly in this paper The work of short time vector spectrum is also involved in this paper What's more, this paper also dealt with different degree of information fusion. From double censors to treble censors, to multi-sensor of the two sections in the same rotor, the vibration of the rotary machine is reflected more and more accurately.After the rigorous study of the theory, using the C++ Builder5.0 as the developing tool, a vector signals analysis system was visualized, which based on the mode of Browser/Server and can run on the Internet With this system, some real fault signals were analyzed and the value of vector spectrum was approvedFrom the study of the vector spectrum theory and its applications, a conclusion can be affirmed: the vector spectrum has high practical value and a developing future.