9,123
edits
Difference between revisions of "NVGate Torsional"
Jump to navigation
Jump to search
→Torsional
| Line 39: | Line 39: | ||
· At least the filter which let you integrate or differentiate the RPM speed to getrespectively plane angle deviations and angular accelerations for the analyses. | · At least the filter which let you integrate or differentiate the RPM speed to getrespectively plane angle deviations and angular accelerations for the analyses. | ||
===Fractional missing pulses management=== | |||
The missing pulses are a common situation faced while doing torsional measurement. In the case of a classical flywheel (60:2) it is easy to set and measure excluding this 2 missing pulses. But most of the measurement done on the industry do not offer the comfort of an encoder or gear teeth access. | |||
[[Image:Release_note_27.jpg|framed|none]] | |||
A very useful solution is the piano (or zebra) tape which is glued on the shaft and read by an optical probe: Easy to install and to use. | |||
But the main problem is to have an entire number of pulses. This is never achievable because the various parameters are difficult to control: Black/white period, diameter of the shaft, thickness of the tape/glue. Well, don<nowiki>'</nowiki>t try, this is not possible. | |||
The solution is to leave a hole which is interpreted as missing pulse. Due to the above variables it will be a fractional number of missing pulse. | |||
OROS torsional function is able to manage such fractional pulses. It offers to achieve torsional measurement on the field in a simple and easy way. | |||
[[Image:Release_note_28.png|framed|none]] | |||
<font color="#0070C0"><u>''''' Piano tape junction for fractional missing pulse management'''''</u></font> | |||
The empty area (missing teeth) length at the piano tape junction must be included between 1 and 3 teeth. The number of missing teeth must be set to the exact number of missing teeth: In this example: 2. | |||
Note: the total number of teeth includes the missing teeth. | |||
==Analyses== | ==Analyses== | ||