How to Develop a Shaker Control System Based on LabView and DSP Card?

[Minh D. Le]

I would like to develop a system to control an LDS 600 lbf shaker for swept sine and resonance dwell testing using off the shelf HW/SW. Does the LabView Sound and Vibration Toolset have what I need?. What kind of DSP card do I need? Any and all suggestions would be greatly appreciated.

[Annette Perez]

Hello,

Depending on the type of signal that the LDS accepts and the range of the signal that it generates, you might want to consider our Dynamic Signal Acquisition and Analysis boards(DSA).

We design dynamic signal acquisition (DSA) modules specifically for applications in audio, noise, and vibration measurement and analysis. DSA modules acquire signals at sampling rates up to 204.8 kS/s with up to 24 bits of resolution. You can analyze the acquired signal using tools such as the Sound and Vibration Toolset and the Order Analysis Toolset for LabVIEW to perform signal processing, such as FFT analysis, fractional octave analysis, and order analysis. These modules combined with the appropr
iate analysis software are ideal for applications in automotive NVH testing, machine condition monitoring, and audio testing. For higher channel systems multiple modules can be synchronized and triggered together.

For more information please feel free to give us a call at (512)683 0100. Hope this helps!

Regards,
Annette Perez

[AVR]

The Sound and Vibration Toolkit (SVT) is probably overkill for a first-time user. Start with the LabVIEW Full Development System(FDS) and look at the example programs for analog output (anything that is available in the SVT can be programmed in LabVIEW FDS). We drive shaker tables to excite turbine blades using LabVIEW and simple Analog Output cards. We modulate, sweep, and do other wierd stuff on 8 channels simultaneously (NI 6713 series). If your goal is to drive the shaker, a 67xx series card could be a solution. Now, if you need simultaneous analog input (AI), well, the selection is more complicated. Do you require DSP or simple AI and software processing (the cost difference can be staggering)? Do you need simultaneous sample-and-hold for cross-correlation o
r would standard sampling suffice? The AI portion will require the most thought on hardware selection (and usually the most money). This would require programming simultaneous analog input and output; however, the LabVIEW FDS contains examples for sync and control of multiple boards.

[Minh D. Le]

You are right about the cost difference between the DSP and the AI card. We have decided to try developing a control system around a 6052E card from one of our DAQ systems and the SVT Toolset. I think an AI card will suffice for a simple sine test with 1 or 2 channels. It is also a cost effective way for us to develope our LabView programming skill. As our testing get more complicated, we will reevaluate our hardware requirement and upgrade them as needed. Thank you for the helpful response.