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Difference between revisions of "NVGate Torsional"
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→Frequency to RPM converter (Torsional inputs)
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Overview | Overview | ||
On reciprocating machinery (diesel engine, pump) or any acyclic rotating devices (generator,compressor), the cause of vibrations often comes from the non-linearity of the angular speed. The analysis of the instantaneous angular speed inside each shaft revolution provides essentialinformation. Such information are helpful for vibrations reduction during prototyping or evenfor source identification while doing service diagnostics.<br> | On reciprocating machinery (diesel engine, pump) or any acyclic rotating devices (generator,compressor), the cause of vibrations often comes from the non-linearity of the angular speed. The analysis of the instantaneous angular speed inside each shaft revolution provides essentialinformation. Such information are helpful for vibrations reduction during prototyping or evenfor source identification while doing service diagnostics.<br> | ||
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Such devices are expensive, lead to more cable, are oftenlimited to 2 probes and so on. But the main inconvenience is the phase error they introducedue to their internal response time.<br> | Such devices are expensive, lead to more cable, are oftenlimited to 2 probes and so on. But the main inconvenience is the phase error they introducedue to their internal response time.<br> | ||
=== Frequency to RPM converter (Torsional inputs)=== | |||
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The instantaneous signals are available for numerous analyses. The main ones are:<br> | The instantaneous signals are available for numerous analyses. The main ones are:<br> | ||
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· The torsional behavior of a shaft ([https://en.wikipedia.org/wiki/Torsional_vibration#Crankshaft_torsional_vibration crankshaft], alternator) or a driving belt (service belt) being excited by its acyclic motion. In such a case the phenomena are analyzed order by order using the cross-phase tracking capabilities of the SOA Plug-in. In this case 2 or more torsional inputs are used: in different location of the shaft or on each pulley driven by the belt.<br> | · The torsional behavior of a shaft ([https://en.wikipedia.org/wiki/Torsional_vibration#Crankshaft_torsional_vibration crankshaft], alternator) or a driving belt (service belt) being excited by its acyclic motion. In such a case the phenomena are analyzed order by order using the cross-phase tracking capabilities of the SOA Plug-in. In this case 2 or more torsional inputs are used: in different location of the shaft or on each pulley driven by the belt.<br> | ||