Selection of Suitable Method for Speed Recovery from Vibration Signal
Typically, if order analysis of vibration signal is expected, a speed sensor (phase marker) or an encoder are installed on the shaft. However, in some practical scenarios, the speed information recorded in parallel to the vibration signal acquisition is not available; yet, it is still required. In this case, one is forced to use a raw vibration signal to extract the information about so-called instantaneous phase or instantaneous frequency of a selected component, and—if required—scale to a selected shaft. In recent years, few different techniques for speed recovery have been proposed, each one with different assumptions and each implementing more or less complexed mathematical apparatus. The current paper proposes a guidance how to select a suitable method on the basis of the visual deduction about signal characteristics with the implication on selection of the easiest and most automatized method sufficient for analysed case.
KeywordsCondition monitoring Speed recovery
This work is partially supported by the National Centre for Research and Development in Poland under the research project no. PBS3/B6/21/2015. The authors also gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation.
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