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Issue
110, September 1999
Internet
Control
by
Jacob Apkarian
Start
• Model Derivation
• Linearization • Control-System
Design • Simulation
•
Coding •
Configurations•
Implementation •
Tuning and Results •
Ready for Takeoff •
Software
and Sources •
Equations PDF
CONFIGURATIONS
The simplest configuration
is a single PC equipped with the appropriate software
and hardware but with no network. In this configuration,
the PC runs both the server and the client and can be
used to perform real-time control, tuning, and monitoring
in the same location.
The second configuration
consists of two PCs—one running the server and another
running the client. In this case, the two PCs must be
connected via Ethernet.
The advantage of this configuration
is that the client is running on a PC that’s usually
not running any software other than Windows 95 and WinCon
W95Client. This setup gives you the fastest possible sampling
rates because the control PC isn’t burdened with
other tasks.
The third configuration consists
of two PCs communicating via the Internet. Each PC is
connected to a server, and they can each be located anywhere
in the world. Essentially, this configuration the same
as the second one, but the connection between the PCs
is via the Internet (see Figure 4).
Figure
4—In
the WinCon Internet/Intranet configuration,
the client runs in real time to control the
plant via a data-acquisition board. The server,
which runs remotely, enables the user to download
the controller, tune it in real time, and monitor
real-time data via the ’Net.
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The last configuration is
one server and many clients running as nodes on the Internet.
The server can download code to several clients and can
maintain communications with all clients simultaneously.
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