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diff --git a/diplomathesis/node2.html b/diplomathesis/node2.html new file mode 100644 index 0000000..07b2d04 --- /dev/null +++ b/diplomathesis/node2.html @@ -0,0 +1,132 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> + +<!--Converted with LaTeX2HTML 2002-2-1 (1.71) +original version by: Nikos Drakos, CBLU, University of Leeds +* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan +* with significant contributions from: + Jens Lippmann, Marek Rouchal, Martin Wilck and others --> +<HTML> +<HEAD> +<TITLE>Abstract</TITLE> +<META NAME="description" CONTENT="Abstract"> +<META NAME="keywords" CONTENT="diplomathesis"> +<META NAME="resource-type" CONTENT="document"> +<META NAME="distribution" CONTENT="global"> + +<META NAME="Generator" CONTENT="LaTeX2HTML v2002-2-1"> +<META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> + +<LINK REL="STYLESHEET" HREF="diplomathesis.css"> + +<LINK REL="next" HREF="node3.html"> +<LINK REL="previous" HREF="node1.html"> +<LINK REL="up" HREF="diplomathesis.html"> +<LINK REL="next" HREF="node3.html"> +</HEAD> + +<BODY > + +<DIV CLASS="navigation"><!--Navigation Panel--> +<A NAME="tex2html158" + HREF="node3.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" + SRC="/usr/share/latex2html/icons/next.png"></A> +<A NAME="tex2html154" + HREF="diplomathesis.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" + SRC="/usr/share/latex2html/icons/up.png"></A> +<A NAME="tex2html148" + HREF="node1.html"> +<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" + SRC="/usr/share/latex2html/icons/prev.png"></A> +<A NAME="tex2html156" + HREF="node3.html"> +<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" + SRC="/usr/share/latex2html/icons/contents.png"></A> +<BR> +<B> Next:</B> <A NAME="tex2html159" + HREF="node3.html">Contents</A> +<B> Up:</B> <A NAME="tex2html155" + HREF="diplomathesis.html">diplomathesis</A> +<B> Previous:</B> <A NAME="tex2html149" + HREF="node1.html">Zusammenfassung</A> + <B> <A NAME="tex2html157" + HREF="node3.html">Contents</A></B> +<BR> +<BR></DIV> +<!--End of Navigation Panel--> + +<H1><A NAME="SECTION00020000000000000000"> +Abstract</A> +</H1> + +<P> +PC based controls are getting more and more popular. +Operating Systems and a huge number of special libraries guarantee a fast development process. +Real-time communication between drives often is important in automation. +Most suitable is a Real-time communication based on standard pc hardware. +In this case there is no need to develop a special driver for each platform. + +<P> +Currently, there is no defined standard for a platform- and operatingsystem independet Real-time communication, in automation. +The only specification, which fulfills these needs, is OMGs Real-time CORBA. +ACE/TAO is an open source, platform-independent C++ implementation of this standard. +This thesis describes the process of research done, to check if ACE/TAO meets the requirements to be used in a industrial welding laser control, based on Real-time Linux. + +<P> +To measure the latency, for transmitting data between two embedded Linux systems, a test environment was build. +A square wave signal was put on a digital input of one system. +Each edge caused sending current digital port state + testdata via ethernet and Real-time CORBA to a second system. +On the second system the digital output ports where set to the state of the digital inputs on system one. +It was discovered, that 1kB data can be transmitted by ACE/TAO Real-time CORBA in 1 ms, under hard real-time conditions. +Measurements with more than 2 embedded systems and a Real-time ethernet switch were made to check, if priorisation works correctly. +As long as all components (ACE/TAO, Real-time switch, Real-time Linux) were configured in proper style, a Priority Inversion may not be evidenced. + +<P> +Memory Footprint in RAM was with less than 1 MB astonishing small, footprint in mass-storage with about 30 MB rather suboptimal. +The performance of the 600 MHz CPU on the embedded system satisfied all tests. + +<P> +A feasibility study discovers C#/.NET CORBA integration. +Most methods, available at the market, for establishing a CORBA connection out of C# were compared. +An example application to control a Real-time C++ process, out of a .NET/C#, GTK# graphical user interface, was created with mono, GTK#, IIOP.NET and ACE/TAO. +It demonstrates that it is possible to host a CORBA Object and to get access to a ACE/TAO hostet CORBA Object, out of C#. + + + +<P> + +<DIV CLASS="navigation"><HR> +<!--Navigation Panel--> +<A NAME="tex2html158" + HREF="node3.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" + SRC="/usr/share/latex2html/icons/next.png"></A> +<A NAME="tex2html154" + HREF="diplomathesis.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" + SRC="/usr/share/latex2html/icons/up.png"></A> +<A NAME="tex2html148" + HREF="node1.html"> +<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" + SRC="/usr/share/latex2html/icons/prev.png"></A> +<A NAME="tex2html156" + HREF="node3.html"> +<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" + SRC="/usr/share/latex2html/icons/contents.png"></A> +<BR> +<B> Next:</B> <A NAME="tex2html159" + HREF="node3.html">Contents</A> +<B> Up:</B> <A NAME="tex2html155" + HREF="diplomathesis.html">diplomathesis</A> +<B> Previous:</B> <A NAME="tex2html149" + HREF="node1.html">Zusammenfassung</A> + <B> <A NAME="tex2html157" + HREF="node3.html">Contents</A></B> </DIV> +<!--End of Navigation Panel--> +<ADDRESS> +Manuel Traut +2007-02-25 +</ADDRESS> +</BODY> +</HTML> |