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Difference between revisions of "NVGate Torsional"
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· The conversion setup is available from the ASB. It is identical to the on-line one: | · The conversion setup is available from the ASB. It is identical to the on-line one: | ||
· At least the Tors. x signal (converted to angular velocity (or acceleration or deviation) is available from the track connection dialog: | · At least the Tors. x signal (converted to angular velocity (or acceleration or deviation) is available from the track connection dialog: | ||
==Twist measurements (static and dynamic)== | |||
The twist measurement consists of computing the angle between the 2 side of transmission shaft (or belt/chain). The measured angle is directly proportional to the stress and the applied [https://en.wikipedia.org/wiki/Torque torque]. One common application is to choose an apropriate [https://en.wikipedia.org/wiki/Harmonic_damper tortional damper]. | |||
The twist can be: | |||
* '''Static twist''': measure the transmitted torque and power. This is a parameter not for analysis | |||
* '''Dynamic twist''': measure the oscillating stress and resonances. This is a dynamic signal to be analyzed. | |||
[[Image:Release_note_25.png|framed|none]] | |||
Both signals are computed simultaneously by the virtual input module. | |||
When the torsional signals are settled up, simply connect it to the ''Virtual input ''plug-in | |||
For computing the phase between the 2 sides of the twist it is necessary having a tachometer. | |||
This tachometer can come from any of the inputs or directly from one of the torsional signals using the ''Torsional <nowiki>+</nowiki> tach.'' mode. | |||
Then click on the ''Tools/Virtual inputs/dynamic'' button to open the virtual inputs setting. Click on the Twist tab. Select each torsional signal from the ''source 1'' and ''source 2'' lists. | |||
[[Image:Release_note_26.png|framed|none]] | |||
The twist will be displayed in angle or torque. The coefficient is used to convert the read angle in torque. | |||
The result are available from the add/Remove windows under the virtual input tab. | |||
====Uncorrelated pulse number==== | |||
Note that the any number of pulses/rev can be used for twist computation and these numbers of pulses/rev can either be different on each side. | |||
The following table describes the difference between classical twist measurement and the OROS one: | |||
{|border="2" cellspacing="0" cellpadding="4" width="100%" | |||
|bgcolor = "#00B0F0"|'''Classical twist measurement''' | |||
|bgcolor = "#00B0F0"|'''OROS twist''' | |||
|- | |||
|bgcolor = "#FBBCB7"|'''Twist measurement force having the same number of pulse on each side. '''The difference between the 2 signals is requiring the same number of sample/rev. | |||
|bgcolor = "#5EF86D"|'''Twist support different number of pulse/rev signals'''. The OROS twist algorithm is based on phase computation rather than pulse timing comparison. Thanks to this the analysis is independent from the number of pulses/rev. | |||
|- | |||
|bgcolor = "#FBBCB7"|Twist measurement based '''on integration of the angular speed''' (torsional)''' is not stable''' | |||
|bgcolor = "#5EF86D"|'''Twist signal is stable and do not diverge'''. Indeed the OROS Twist algorithm do not uses integration techniques | |||
|} | |||
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NVGate | NVGate allows achieving angular sampled analysis avoiding the artifacts introduced by the direct angular sampling. | ||