Virtual characteristic analyzer of rotating machinery based on time-frequency analysis and virtual instrument technique

In order to extract the characters of rotating machinery conveniently and effectively, a new order analysis method, which is based on instantaneous frequency estimation of peak searching, is proposed; Furthermore, a convenient and applicable Virtual Characteristic Analyzer of Rotating machinery is developed successfully. Combining the quick-developed time-frequency analysis technique with the virtual instrument technique, and utilizing instantaneous frequency estimation theoretics of time-frequency analysis technique, this method only uses the vibration signal of rotating machinery to carry out order analysis. Compared with the traditional and existing instruments for analyzing rotating machinery run-up and run-down non-stationary signal, it makes up the disadvantage in need of special hardware. Its successful design and experiments sufficiently embodies virtual instrument's design idea, i.e. 'software is instrument', and it makes a great breakthrough for the existing order analyzer. Experimental results indicate that the method proposed is correct and can extract the characters of rotating machinery conveniently and effectively; it has a great application value in engineering.