Difference between revisions of "NVGate Diesel Engine Vibration Solution: EngineDiag"

Jump to navigation Jump to search

NVGate Diesel Engine Vibration Solution: EngineDiag (view source)

Revision as of 22:41, 12 June 2020

44 bytes added ,  22:41, 12 June 2020
no edit summary
Line 258: Line 258:
From the parameters defined in the engine model, the Advisor will help the user to configure NVGate correctly.
From the parameters defined in the engine model, the Advisor will help the user to configure NVGate correctly.


The advisor is a help, it<nowiki>'</nowiki>s not compulsory to use it for the configuration.
The advisor is a helpful tool, it<nowiki>'</nowiki>s not compulsory to use it for the configuration.


[[Image:EngineDiag_37.png|framed|none]]
[[Image:EngineDiag_37.png|framed|none]]
Line 276: Line 276:
[[Image:EngineDiag_39.png|framed|none]]
[[Image:EngineDiag_39.png|framed|none]]


|Regarding the type of analysis selected, some settings are missing to obtain all the results.  
|Regarding the type of analysis selected, some settings are missing in order to obtain all the results.  


|-
|-
Line 282: Line 282:
[[Image:EngineDiag_40.png|framed|none]]
[[Image:EngineDiag_40.png|framed|none]]


|Regarding the type of analysis selected, the NVGate configuration is correct. The user can choose which results he wants to display and start the acquisition
|Regarding the type of analysis selected, the NVGate configuration is correct. The user can choose which results he wants to display and start the acquisition.


|}
|}


By clicking on the Advisor button, all the errors will be displayed with title, explanation and criticality as below.
By clicking on the Advisor button, all the errors will be displayed with title, explanation and criticality, as shown below.


[[Image:EngineDiag_41.png]]
[[Image:EngineDiag_41.png]]
Line 296: Line 296:
.
.


* Click on [[Image:EngineDiag_44.png]]will automatically set up NVGate to solve the error.
* Click on [[Image:EngineDiag_44.png]] and it will automatically set up NVGate to solve the error.
* Click on [[Image:EngineDiag_45.png]] will open the window where the user has to do an action to solve the error.
* Click on [[Image:EngineDiag_45.png]] and it will open the window where the user has to do an action to solve the error.
To gain time, the function "Fix All" available by the button [[Image:EngineDiag_46.png]]
To save time, the [[Image:EngineDiag_46.png]] button
allows to fix all the displayed errors that can be solved automatically.
allows you to fix all the displayed errors that can be solved automatically.


[[Image:EngineDiag_47.png|framed|none]]
[[Image:EngineDiag_47.png|framed|none]]


The" Fix Selected" function, available by the button
The "Fix Selected" button,
[[Image:EngineDiag_48.png]]
[[Image:EngineDiag_48.png]]
, solves the selected errors in the list.
, solves the selected errors in the list.


The advisor gives only advices. The user can read the information and decide to ignore some of the errors.  Each error can be hidden by clicking on the button hide showed below
The advisor gives only advices. The user can read the information and decide to ignore some of the errors.  Each error can be hidden by clicking on the button shown below.


[[Image:EngineDiag_49.png|framed|none]]
[[Image:EngineDiag_49.png|framed|none]]


The "Hide Selected" function, available by the button
The "Hide Selected" function,
[[Image:EngineDiag_50.png]]
[[Image:EngineDiag_50.png]]
, allows to hide several errors at the same time by selecting them.
, allows you to hide several errors at the same time by selecting them.


All the hidden functions are not deleted. At every time the user can display all of them by clicking on the button
All the hidden functions are not deleted. At any time the user can display all of them by clicking on the button
[[Image:EngineDiag_51.png]]
[[Image:EngineDiag_51.png]]
.
.


The advisor displays the important rules to make a correct measurement but the NVGate configuration is not restricted to the advices showed here.
The advisor displays the important rules to make a correct measurement but the NVGate configuration is not restricted to the advice shown here.


All the capabilities of NVGate are available. The user can complete this first configuration to adapt perfectly the configuration to its application.
All the capabilities of NVGate are available. The user can complete this first configuration to perfectly adapt it to its application.


==The dedicated results==
==The Dedicated Results==


With the Engine Module, several dedicated results are available.
With the Engine Module, several dedicated results are available.


These results can be displayed through the window "Add/Remove window" available in the ribbon "Display/Graphs".
These results can be displayed through the "Add/Remove window" available in the ribbon "Display/Graphs".


[[Image:EngineDiag_52.png|framed|none]]
[[Image:EngineDiag_52.png|framed|none]]
Line 335: Line 335:
[[Image:EngineDiag_53.png|framed|none]]
[[Image:EngineDiag_53.png|framed|none]]


===Time signal - The Triggered block Engine===
===Time signal - The Triggered Block Engine===


The triggered block engine is a new result of the Synch order plug-in associating the engine information to the standard synchronous triggered blocks.
The triggered block engine is a new result of the Sync. order plug-in associating the engine information to the standard synchronous triggered blocks.


Select the results as below:
Select the results as below:
Line 343: Line 343:
[[Image:EngineDiag_54.png|framed|none]]
[[Image:EngineDiag_54.png|framed|none]]


The following window will be displayed
The following window will be displayed:


[[Image:EngineDiag_55.png|framed|none]]
[[Image:EngineDiag_55.png|framed|none]]
Line 354: Line 354:
[[Image:EngineDiag_56.png|framed|none]]
[[Image:EngineDiag_56.png|framed|none]]


* The cycle overview (defined in Engine/Timing) of each displayed cylinders is shown at the bottom of the window. The cycle overview of each cylinders is determined thanks to:
The cycle overview (defined in Engine/Timing) of each displayed cylinders are shown at the bottom of the window. The cycle overview of each cylinders is determined by:
* The tachometer reference
* The tachometer reference
* The firing order
* The firing order
* The timing diagram
* The timing diagram


* 2 cursors displayed on the signals and the cycle overview allow to identify the kinematic events on the signals.
2 cursors displayed on the signals and the cycle overview allow you to identify the kinematic events on the signals.
*  
*  
[[Image:EngineDiag_57.png|framed|none]]
[[Image:EngineDiag_57.png|framed|none]]


On the example above the cursors are positioned at the beginning of the 2 main events of the signal. Looking at the cycle overview, one can notify that:
On the example above the cursors are positioned at the beginning of the 2 main events of the signal. Looking at the cycle overview, one can note that:


* the first cursor corresponds to the end of the exhaust phase, ie the exhaust valve closing
* The first cursor corresponds to the end of the exhaust phase, i.e. the exhaust valve closing
* The second cursor corresponds to the end of the intake phase, ie the intake valve closing.
* The second cursor corresponds to the end of the intake phase, i.e. the intake valve closing.
* By default, only one cycle is displayed in this window, 360° (crankshaft angle) for a 2-strokes engine or 720 ° (crankshaft angle) for a 4-strokes engine. More cycles can be displays. The number can be defined in the Engine Ribbon.
* By default, only one cycle is displayed in this window, 360° (crankshaft angle) for a 2-strokes engine or 720 ° (crankshaft angle) for a 4-strokes engine. More cycles can be displayed. The number can be defined in the Engine Ribbon.


[[Image:EngineDiag_58.png|framed|none]]
[[Image:EngineDiag_58.png|framed|none]]
Line 410: Line 410:
|}
|}


* The signals can be aligned on a same event by selecting the <nowiki>'</nowiki>align<nowiki>'</nowiki> function in the Engine Ribbon.
The signals can be aligned on the same event by selecting the <nowiki>'</nowiki>align<nowiki>'</nowiki> function in the Engine Ribbon.


[[Image:EngineDiag_59.png|framed|none]]
[[Image:EngineDiag_59.png|framed|none]]
Line 416: Line 416:
===Comparison===
===Comparison===


This Trigger Block Engine result can be saved as any NVGate results. Add the results in the Save selection Tab available in the Save setup window accessible in the Measurement Ribbon.  
This Trigger Block Engine result can be saved as any NVGate result. Add the results in the "Save Selection" tab, which is available in the "Save Setup" window, which is accessible in the Measurement Ribbon.  
[[Image:EngineDiag_60.png|framed|none]]
[[Image:EngineDiag_60.png|framed|none]]


Otherwise right click in the window and click on <nowiki>'</nowiki>Add to result selection like below.
Otherwise right click in the window and click on "Add to result selection", like below.


[[Image:EngineDiag_61.gif|framed|none]]
[[Image:EngineDiag_61.gif|framed|none]]
Line 427: Line 427:
[[Image:EngineDiag_62.png|framed|none]]
[[Image:EngineDiag_62.png|framed|none]]


The save results can be compared between them or with current result in the same window.
The saved results can be compared between them or with a current result in the same window.


To add result in a window, drag&drop the result from the project manager to the window.
To add result in a window, drag&drop the result from the project manager to the window.
Line 435: Line 435:
The cycle overview of each of the measurements is also displayed.
The cycle overview of each of the measurements is also displayed.


===The averaged RMS Engine===
===The Averaged RMS Engine===


The Averaged RMS Engine is a result available in the Waterfall allowing to display the RMS level of the cylinders calculated on the engine cycle and averaged on the measurement.
The Averaged RMS Engine is a result available in Waterfall, allowing you to display the RMS level of the cylinders calculated on the engine cycle and averaged on the measurement.


This new result is based on the RMS level calculated in the Synch. Order plug-in.
This new result is based on the RMS level calculated in the Sync. Order plug-in.


Select the results as below:
Select the results as shown below:


[[Image:EngineDiag_64.png|framed|none]]
[[Image:EngineDiag_64.png|framed|none]]


The following window will be displayed.
The following window will be displayed:


[[Image:EngineDiag_65.png|framed|none]]
[[Image:EngineDiag_65.png|framed|none]]


This window shows the averaged RMS value on the engine cycle for each cylinder. The viewmeter indicates the value and the symbol  
This window shows the averaged RMS value on the engine cycle for each cylinder. The viewmeter indicates the value and the symbol  
[[Image:EngineDiag_66.png]]represents the standard deviation.
[[Image:EngineDiag_66.png]] represents the standard deviation.


These values are all displayed in a summary table in the infotrace.
These values are all displayed in a summary table in the infotrace.


After a first visualization of the global RMS level calculated on the complete cycle, it<nowiki>'</nowiki>s possible to display the RMS level of each phase of the cycle, typically the combustion, the exhaust, the intake and the compression.
After a first visualization of the global RMS level calculated on the complete cycle, it<nowiki>'</nowiki>s possible to display the RMS level of each phase of the cycle; typically the combustion, the exhaust, the intake and the compression.


To display these results, click on one phase of the cycle overview displayed at the bottom of the window.
To display these results, click on one phase of the cycle overview displayed at the bottom of the window.


Below the RMS level calculated during the combustion.
Below the RMS level is calculated during the combustion.


[[Image:EngineDiag_67.png|framed|none]]
[[Image:EngineDiag_67.png|framed|none]]
Line 466: Line 466:
===Comparison===
===Comparison===


This Avg. RMS Engine result can be saved like the others NVGate result. Add the results in the Save selection Tab available in the Save setup window accessible in the Measurement Rubon.
This Avg. RMS Engine result can be saved like the other NVGate results. Add the results in the "Save Selection" tab available in the "Save setup" window, whichi is accessible in the Measurement Ribbon.


[[Image:EngineDiag_68.png|framed|none]]
[[Image:EngineDiag_68.png|framed|none]]
Line 474: Line 474:
[[Image:EngineDiag_69.png|framed|none]]
[[Image:EngineDiag_69.png|framed|none]]


To compare results, drag&drop the results from the Project Manager to the window.
To compare results, drag & drop the results from the Project Manager to the window.


The software will automatically arrange the results by cylinder and date. The results are grouped by cylinders and the first result displayed is the older one.
The software will automatically arrange the results by cylinder and date. The results are grouped by cylinders and the first result displayed is the oldest one.


[[Image:EngineDiag_70.png|framed|none]]
[[Image:EngineDiag_70.png|framed|none]]
Line 484: Line 484:
There is no limitation regarding the number of results that can be displayed at the same time.
There is no limitation regarding the number of results that can be displayed at the same time.


To remove results, right click on the window, select <nowiki>'</nowiki>Remove results<nowiki>'</nowiki> and the results one wants to remove.
To remove results, right click on the window, select <nowiki>'</nowiki>Remove Result<nowiki>'</nowiki> and the results you want to remove.


[[Image:EngineDiag_72.gif|framed|none]]
[[Image:EngineDiag_72.gif|framed|none]]


This display allows to compare few measurements. To make trend analysis on several measurements, it<nowiki>'</nowiki>s possible to change the display mode.
This display allows you to compare a few measurements. To make a trend analysis on several measurements, it<nowiki>'</nowiki>s possible to change the display mode.


The 2 modes are available by right clicking on the window and select display mode.  
The 2 modes are available by right clicking on the window and selecting "Display Mode".  


{|border="2" cellspacing="0" cellpadding="4" width="100%"
{|border="2" cellspacing="0" cellpadding="4" width="100%"
Line 508: Line 508:
|}
|}


The History mode shows the values with the standard deviation in absolute time. It allows to follow the parameters during a long period.
The History mode shows the values with the standard deviation in absolute time. It allows you to follow the parameters during a long period.


In this representation, a color is associated to each cylinder.  The same color is used on the graph and in the results table in the infotrace.
In this representation, a color is associated to each cylinder.  The same color is used on the graph and in the results table in the infotrace.


==Angle-Frequency analysis and display==
==Angle-Frequency Analysis and Display==


Angle-Frequency analysis is interesting when working on reciprocating machine. It allows to identify specific events.
Angle-Frequency analysis is interesting when working on a reciprocating machine. It allows you to identify specific events.


The method implemented in the software is based on the [https://en.wikipedia.org/wiki/Wigner_distribution_function Wigner-Ville algorithm].
The method implemented in the software is based on the [https://en.wikipedia.org/wiki/Wigner_distribution_function Wigner-Ville algorithm].


This method is particularly adapted for short transient signal where the STFT is not sufficient. Another advantage is the good resolution both in angle and frequency one can obtain.
This method is particularly adapted for short transient signal where the STFT is not sufficient. Another advantage is the good resolution, both in angle and frequency, that one can obtain.


The principle is to represent the energy density on a colorspectrogram using the Wigner-Ville distribution (W (θ, f)). The relevance of the results of such analysis depends on settings including angle and frequency resolution.
The principle is to represent the energy density on a colorspectrogram using the Wigner-Ville distribution (W (θ, f)). The relevance of the results of such analysis depends on settings including angle and frequency resolution.
Line 530: Line 530:
This analysis is available in post-analyze only.
This analysis is available in post-analyze only.


===A dedicated window===
===A Dedicated Window===
Before starting, note that this analysis is available in post-analyze only.
Before starting, note that this analysis is available in post-analyze only.


If a signal is loaded in the player, click on the button angle-frequency in the Engine Ribbon to open the following dedicated window.
If a signal is loaded in the player, click on the button "Angle-Frequency" in the Engine Ribbon to open the following dedicated window:


[[Image:EngineDiag_77.png|framed|none]]
[[Image:EngineDiag_77.png|framed|none]]


It<nowiki>'</nowiki>s also possible to use the angle-frequency analysis on another signal not loaded in the player.
It<nowiki>'</nowiki>s also possible to use the "Angle-Frequency Analysis" on another signal not loaded in the player.


In this case, right click on the concerned signal in the project manager and select Angle-Frequency Analysis.
In this case, right click on the concerned signal in the project manager and select "Angle-Frequency Analysis".


[[Image:EngineDiag_78.gif|framed|none]]
[[Image:EngineDiag_78.gif|framed|none]]


===Result manager===
===Result Manager===


The Result manager shows the signal(s) and the tracks that will be analyzed in angle-frequency.
The Result Manager shows the signal(s) and the tracks that will be analyzed in angle-frequency.


Click on the button  [[Image:EngineDiag_79.png]]. The following part of the window will appear.
Click on the button  [[Image:EngineDiag_79.png]]. The following part of the window will appear.
Line 551: Line 551:
[[Image:EngineDiag_80.png|framed|none]]
[[Image:EngineDiag_80.png|framed|none]]


* Signal
'''Signal'''
One can see the selected signal name and the corresponding project.
One can see the selected signal name and the corresponding project.


It<nowiki>'</nowiki>s possible to open several different signals in a same window by clicking on "open signal".
It<nowiki>'</nowiki>s possible to open several different signals in a same window by clicking on "open signal".


* Tachometers
'''Tachometers'''
The second step is to define the tachometers that will be used for the analysis:
The second step is to define the tachometers that will be used for the analysis:


* Assoc. Tach: define here the tachometer that will be used for the synchronous analysis.
* Assoc. Tach: here you can define the tachometer that will be used for the synchronous analysis.
* Samp. Pulse: indicate here the tachometer that will be used for the angular sampling. This signal must contain several pulses per revolution and will lead to a better accuracy in angle. Nevertheless, it<nowiki>'</nowiki>s not necessary to define a sampling pulse. The angular sampling can be done with the Assoc. Tach. In this case, set this parameter to none.
* Samp. Pulse: indicate the tachometer that will be used for the angular sampling. This signal must contain several pulses per revolution and will lead to a better accuracy in angle. Nevertheless, it<nowiki>'</nowiki>s not necessary to define a sampling pulse. The angular sampling can be done with the Assoc. Tach. In this case, set this parameter to none.
* Tracks
 
'''Tracks'''
Select the tracks that will be analyzed and displayed and click on <nowiki>'</nowiki>Add track<nowiki>'</nowiki>. If several signals are loaded in the window, the displayed tracks list will depend on the selected signal. Select each signal one by one and choose the tracks for each of them.
Select the tracks that will be analyzed and displayed and click on <nowiki>'</nowiki>Add track<nowiki>'</nowiki>. If several signals are loaded in the window, the displayed tracks list will depend on the selected signal. Select each signal one by one and choose the tracks for each of them.


[[Image:EngineDiag_81.png|framed|none]]
[[Image:EngineDiag_81.png|framed|none]]


After this first step, it<nowiki>'</nowiki>s possible to click again on [[Image:EngineDiag_82.png]]to reduce this window part.
After this first step, it<nowiki>'</nowiki>s possible to click again on [[Image:EngineDiag_82.png]]to reduce this window section.


===Settings===
===Settings===


Three parameters have to be set up, the angular resolution, the frequential resolution and the average size. They can be modified in the window bar:
Three parameters have to be set up: the angular resolution, the frequential resolution and the average size. They can be modified in the window bar:


[[Image:EngineDiag_83.png|framed|none]]
[[Image:EngineDiag_83.png|framed|none]]


* Angular resolution: this parameter determines the angle that separates two values in the angle axis. The maximum resolution can be determined in function of the machine.
'''Angular resolution:''' this parameter determines the angle that separates two values in the angle axis. The maximum resolution can be determined in function of the machine.
For example, working on a 4-strokes 12 cylinders diesel engine, the angular resolution must be lower than 720/12= 60° to be able to differentiate all the events on the different cylinders.
For example, working on a 4-strokes 12 cylinders diesel engine, the angular resolution must be lower than 720/12= 60° to be able to differentiate all the events on the different cylinders.


* Frequential resolution: This parameter determines the frequency that separates two values in the frequency axis.
'''Frequential resolution:''' This parameter determines the frequency that separates two values in the frequency axis.
* Average size: This parameter is the average number used to calculate the Wigner-Ville spectrum. For this result, the average is made on the engine cycle (720° for a 4-strokes engine and 360° for a 2-strokes engine). In most cases, set the average number to 100 lead to good results.
'''Average size:''' This parameter is the average number used to calculate the Wigner-Ville spectrum. For this result, the average is made on the engine cycle (720° for a 4-strokes engine and 360° for a 2-strokes engine). In most cases, set the average number to 100 leads to good results.


When these parameters are set up, click on [[Image:EngineDiag_84.png]]to launch the computation and display the result.
When these parameters are set up, click on [[Image:EngineDiag_84.png]]to launch the computation and display the result.
Line 589: Line 590:
[[Image:EngineDiag_85.png|framed|none]]
[[Image:EngineDiag_85.png|framed|none]]


====display tools====
====Display Tools====


Each graph can be maximized by clicking on the following button in the top right corner of each graph. Move the mouse over this area to let the button appear.
Each graph can be maximized by clicking on the following button in the top right corner of each graph. Move the mouse over this area to let the button appear.
Line 599: Line 600:
[[Image:EngineDiag_87.gif|framed|none]]
[[Image:EngineDiag_87.gif|framed|none]]


* Cursors
''Cursors''
By default the energy spectrum and the instantaneous power are calculated from the complete colorspectrogram.
By default, the energy spectrum and the instantaneous power are calculated from the complete colorspectrogram.


With the mouse, it<nowiki>'</nowiki>s possible to select a part of the colorspectrogram and calculate the energy spectrum and instantaneous power from this selection.
With the mouse, it<nowiki>'</nowiki>s possible to select a part of the colorspectrogram and calculate the energy spectrum and instantaneous power from this selection.
Line 618: Line 619:
===Comparison===
===Comparison===
====Tracks from the same signal====
====Tracks from the same signal====
Open the result manager part  [[Image:EngineDiag_88.png]]
Open the result manager with [[Image:EngineDiag_88.png]]


[[Image:EngineDiag_89.png|framed|none]]
[[Image:EngineDiag_89.png|framed|none]]


All the tracks available in the opened signal are showed. Select the tracks, click on add track and click on the button Compute to add these results in the window
All the tracks available in the opened signal are shown. Select the tracks, click on add track and click on the button "Compute" to add these results in the window.


[[Image:EngineDiag_90.png|framed|none]]
[[Image:EngineDiag_90.png|framed|none]]
Line 629: Line 630:


The buttons [[Image:EngineDiag_92.png]]
The buttons [[Image:EngineDiag_92.png]]
at the left top corner allow to navigate among the results and visualize the various calculated colorspectrograms.
at the left top corner allow you to navigate among the results and visualize the various calculated colorspectrograms.


====Report====
====Report====
To add the angle-frequency results in a report, go to the report ribbon, select the active Word file and drag&drop the Angle frequency icon to the document.
To add the angle-frequency results in a report, go to the Report ribbon, select the active Word file and drag & drop the Angle-Frequency icon to the document.




[[Image:EngineDiag_93.png|framed|none]]
[[Image:EngineDiag_93.png|framed|none]]
AmberSmith
writer
12

edits

Retrieved from "https://wiki.oros.com/index.php?title=Special:MobileDiff/5356"

Navigation menu