Tuesday, February 28 is our next meeting. Call for presentations.

[FabiolaDelaCueva]

Hi LAF members,

Welcome back! After the migration from the communities to the forums, we are back!

Next meeting is Tuesday, February 28 at 6:00 PM

We will post in the comments the presentations we had already volunteers for. We will decide which presentations to give based on the number of kudos.

Feel free to add your own presentation, include Presenter Name, Title and Description.

Also, add a topic you would like to hear more about and then maybe others volunteer to talk about it.

And as Allen Smith mentioned during the last meeting, a very valid topic is:  Open discussion regarding topic x, where there is not really a single presenter and we handle it as a group discussion.

Thanks,

Fab

[FabiolaDelaCueva]

Presenter: Aaron Gelfand

Description:

Averaging data can take many forms, for a project, I was requested to implement a time weighted average to smooth data spikes. The time weighting formula could be adjusted to a user specified value (# of averages), and also had to account for situations in which older data did not yet exist. FPGA code requires data to be fixed in length. Although not successfully implemented in FPGA during the project (had to move it up to the RT layer), this presentation will show how I was eventually able to implement the code in the FPGA, and some of the changes made to make it scaleable for a large number of channels while using minimal FPGA resources.

[FabiolaDelaCueva]

Presenter: Damien Gray

Title: Data Modeling using Objects

Description: The various minimization and fitting VIs included in LabVIEW were written a long time ago (late 90s?). Some include options to dynamically call a function, others do not. Most have a fixed set of starting conditions that do not give you the flexibility you need when modeling things like third order surfaces or highly nonlinear functions. A bit of copy / paste into an object-based model solves most of these problems, and allows you the flexibility needed to successfully model something complex. I have completed basic functionality (Nelder-Mead and Conjugate Gradient minimizers with arbitrary functions) and currently use these methods for modelling complex physical systems. There will be examples!

[Craig_]

Meeting can be seen here: http://forums.ni.com/t5/LabVIEW-Architects-Forum/Meeting-Tuesday-February-28-Modeling-and-Averaging-...