System Applications - Aerospace

Jet Engine Test Cell Upgrade Summary: These data acquisition systems meet the customer's requirements for high accuracy, high throughput and the ability to preserve existing application software, while providing state-of-the-art replacements for existing systems.

We are providing VXI-based data acquisition systems as part of a test cell upgrade program for a major manufacturer of jet aircraft engines. A typical test system includes 1500 channels of signal conditioning and analog-to-digital conversion as well as frequency counter channels, digital-to-analog converter channels and discrete outputs. Each data system includes three VXI mainframes interco- nnected by our high-throughput fiber-optic Grand Interconnect (GI). The GI and its list memory serve as the data engine for this system. Data is acquired at 1000 Hz, 200 Hz and 10 Hz. An overall accuracy of several microvolts is required for the analog input channels. Our V243 and V208 modules, which include on-line calibration, meet this requirement.

A key strategy in these systems involves the use of reflective memory. The reflective memory is used as a data highway to other test stand systems . This can be considered to be common memory pool of data. With this configuration, other computer platforms also have access to the same engine data in a real-time mode. The reflective memory allows the customer to maintain their current application software, which has been developed over many years.

The primary KineticSystems products used in this application are:

• V160 Grand Interconnect VXI Slot-0 Controller with fiber optic interface
• V195 13-Slot, C-Size, VXIbus Mainframe
• V208 16-bit, 100,000 Sample/sec ADC host for the V243 modules
• V243 96-channel Low-level Signal Conditioner with 2-pole active filters
• V266 16, 32, or 64-channel, 16-bit DAC
• V635 128-channel Digital Input/Output

This application note is provided "as is" without any warranties of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. KineticSystems Company, LLCfurther does not warrant the accuracy and completeness of the material contained herein. KineticSystems Company, LLC may make changes to this material, or to the products described in it, at any time without notice.

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