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I would like a tool that would help identify noise spikes in my data, so that they may be set to NO VALUE or carefully interpolated.  In the attached example, I have two torque spikes in my data that are significantly higher than the mean.  If I were only looking at one file, I would simply "Set Flags" in VIEW, then "Flags: Remove Data Points". However, I am reviewing dozens of files with several channels of interest.  

 

Peak data points are the most damaging to the components under test, so it is important that we keep the real events and reject the noise.  

 

Concerns with other peak / spike removal options:

  • Manual Set Flags -> Flags:  Remove Data Points; time required
  • ANALYSIS -> Event Search -> Event = Window -> Upper Limit:  In other data files, I have real events with values higher than the noise in this data file.  
  • ANALYSIS -> Digital Filters or Smoothing:  This will change all of the data - it will likely narrow the peak-to-peak of my other data and interpolate my noise spikes, adding damage that is not actually real.  I only want to remove a few data points in the channel data. 

nCode Glyphworks has a nice Spike Detection Tool that uses 6 available algorithms to detect spikes.  Once it identifies them, it allows the user to see them, prior to performing any actions - this is important, because it allows the user to identify if they are real or noise, prior to taking action.  

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I want to add a feature of TREWESS into DIAdem. There is a statement in the "Dynamometer Performance Evaluation and Quality Assurance Procedures" that the TREWESS technique (available using DataDesk analysis software:https://datadescription.com/tech-specs/) is a recommended approach. Right now, although OEMs need to adjust standards from "Dynamometer Performance Evaluation and Quality Assurance Procedures" to "40 CFR Part 1066", there is not mentioned about filtering in the responsive assessment so that some OEM customers(especially who have certified Dynamometer benches) request to evaluate with previous TREWESS. Since DataDesk has features of Lowess, TREWESS and Running Median in the Non-Linear Smoothers, they want to use at least TREWESS in the Non-Linear Smoothers.

makes targeted placement faster and easier

I really love all of the Event search functions and commands, but I wonder if perhaps you could make a class out of this so we'd have intellisense available.  Also, many of the commands are very similar and difficult to find.

 

event.png

Include an rotational speed depending filterring function to extract ordern in a time signal

Hello

 

I was wondering if there would be a way to implement an linear extraploation function which would allow the user to extrapolate between two linear points?

 

For input I would image the function would need data between two data points of a channel and how far out (or in or both) the end user would like to extrapolate.

 

I have created my own function but it would be neat to have one available in DIAdem to quickly select some data points on a curve.

 

Attached is a copy of my function

Knee, Thigh, Hip (KTH) is a newer injury requirment for the IIHS small overlap test.  I would like to see it added to future versions of the crash analysis tool kit.

 

Thank you,

 

David

I am very glad that the SRS analysis function was included in DIAdem!  Thanks!  Now, I would really like to be able to supply my own channel of specific frequencies that I would like the SRS analysis performed at.  The current implementation has the user enter the number of frequencies he wants per octave.  There are occasions where I am generating an SRS from data to match an existing SRS and it would be very useful to use the same frequencies as the original.  Thanks!

I think it would be helpful to have something like this example http://www.ni.com/white-paper/3549/en (DIAdem2012 optimized Version) as user defined function (like hysteresis).

First, major kudos to whoever implemented the Shock Response Spectrum (SRS) in Analysis!!  This is a huge step for us in the shock and vibration world!  Only one small request:  may we have the option of supplying our own frequency channel?  Being restricted to only "frequencies per octave distance" may work for some but we have need to use different frequency spacings.  Thanks!