بحث بعنوان Vibration Analysis - A Literature Review

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بحث بعنوان
Vibration Analysis - A Literature Review
Vishnu Kv, Anoop Bk, Adarsh Ks
[1] II Sem MTech C&SP ,VJEC ,[2]Assistant Prof. ECE, VJEC, [3]Assistant Prof.ECE, VJEC

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Abstract: This paper covers the basic idea behind the vibration analysis and uses that information to reduce
failures and thus save resources. This paper gives an idea on why vibration monitoring is important, How
vibration is described? and, How to measure these vibration?.The extend of vibration analysis depends on the
purpose of carrying out vibration analysis.
keywords: vibration , monitoring , analysis.
I. Introduction
We all are familiar with vibration in one or the other form . The different form of vibration can be
sensed by seeing, touching etc here we are concerned about the vibration of machine or its parts. The perception
of human beings vary from person to person, if one person finds that particular vibrations are bad for the proper
working of machine , any other person may find it useful .Some vibration are beyond the range of human
perceptions [3].Thus many new technologies came into existence to measure and analyze the same. So , what is
vibration ? It is the to and fro movement of machine or its components. These vibration may sometimes be
designed for some purpose or in some other cases damages the machine. The vibrations cause loss in money and
time [2]. Here mainly we are dealing with unintended machine vibrations. Vibration is inversely related to the
lifetime of the machine. Low levels of vibration indicate low vibratory forces , resulting improved machine life.
When the machines performance deteriorates , the dynamic forces generated by the machine will
increase intensity , causing an increase in machine vibration or the physical integrity of the machine will be
reduced , causing an increase in the machine vibration. There are mainly four factors that determine the
characteristics of vibration and they are : the exciting force( which is due to the misalignment or looseness),
mass of the vibrating system , stiffness of the vibrating system and damping characteristics of the vibrating
system. The last three factors tries to stop or minimize the vibration whereas the first factor causes the vibration.
Conclusion
In this paper I have emphasized the importance of collecting and analysis of vibration data . Scheduled
analysis of vibration data helps to maintain the health and thus improve the life time of the machine which saves
the time and money . A wavelet toolbox is found to be a good tool for the better analysis of the non-stationary
signals when comparing with FFT.

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