Modern State Space Representation Using ADwin DAQ Systems
By: CAS DataLoggers
CAS DataLoggers provided the ADwin data acquisition and control solution to an internationally-
To match this unique project, CAS DataLoggers supplied the manufacturer with ADwin PRO-II Data Acquisition and Control Systems (https://www.dataloggerinc.com/
ADwin hardware features analog and digital I/Os and interfaces such as CANbus, RS232, ProfiBus, SSI decoders and more to connect the ADwin to the test environment. Communication with the PC is via the Ethernet interface. Multiple PCs can communicate with one ADwin system which can be useful during program implementation and commissioning.
As the lead engineer of the project explains, "We spent a week or two with the demo unit CAS DataLoggers sent us—it's high speed and easy to use. Now we're heavily using the two ADwin Pro-ll systems we purchased earlier and we're already incorporating this newest one.
"Our ADwin systems are installed in the laboratory space we've devoted to this project. We're using three similar, independent PRO-II systems in the same facility located in different departmental subgroups. Control for our application is provided by a modern state space-based controller."
These ADwin-PRO-II systems are benchtop units featuring a ½ 19" enclosure (9-inch wide, 5 ¼ inch high), a 10-35V DC-DC converter and 7 data acquisition card slots. All modules are mounted from the front side.
The ADwin PRO-II T12 processor module features the Xilinx Zynqtm dual-core ARM Cortex-A9, 64 bit FPU with 1 GB main memory for code and data. The T12 processor has extremely short response times so control or regulatory processes run reliably with cycle frequencies far above 1 MHz. The ADwin processor enables complex calculations such as this application's state space representation differential equations. The team's systems also feature the optional accelerated Ethernet Interface (10/100MBIT/
The team is using ADwin in a controlled environment to prevent a certain event in a continually-
Data Acquisition Cards
ADwin's wide variety of different modules are the flexible foundation for rapid real-time applications. This control project takes advantage of ADwin's wide range of data acquisition cards, utilizing many different ADwin modules including co-processor modules, analog input, and output cards, and high-speed CAN bus interfaces for vehicular communication.
The analog input cards offer 8 to 32 analog inputs and the analog output cards add 8 outputs each. The high-speed CAN interface features 2x CAN bus, a high-speed 9pin D-sub connector, and ADwin's real-time TICO processor. The bus bandwidth of up to 200 MByte/s significantly increases the capacity of the internal traffic between the processor module and the new Pro-II output modules.
All new Pro-II modules operate on the same backplane clock, allowing fully-synchronized time measurements from multiple modules without any special software effort.
Thanks to ADwin's flexibility, the team was able to order customized modular systems to satisfy their unique application. Their three ADwin PRO-II systems are equipped with processor modules, analog I/O cards and high-speed CAN bus interfaces to enable their vehicular project needs.
Coming in just under the project budget, ADwin has proved to be an affordable data acquisition and control solution able to analyze this multi-input and output application and establish the desired state space representation. ADwin offers sophisticated control and runs Simulink models in real time, up to 100 kHz speed, via the ADsim block set and ADsimDesk GUI. In this way, project development and testing is simplified and users can more easily integrate algorithms into models and analyze the results.
The project lead comments, "Our team has been looking at this application for a long time now. If we had known about ADwin years ago I'd have gotten five of these systems back then. For us the major benefit is the ADwin system's high throughput which lets us get a sample in and out at extremely fast speeds. Your systems definitely work as advertised."
For more information on ADwin test control systems (https://www.dataloggerinc.com/