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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Hi James, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>You could call that a
communication bottle neck, but the slow speed mainly comes from the fact that
MATLAB has to be called (and executed) during each iteration. This implies a
huge overhead. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>An alternative is to
compile your MATLAB model into an S-function and create a DLL that can be used
like any TRNSYS type (adding the TRNSYS API to the generated source). I wrote a
MATLAB real time workshop template for the MSVC C++ compiler to automize this
from within MATLAB. For this to work, you need MATLAB real time workshop (expensive)
/ SIMULINK (expensive) and Microsoft Visual C++ 2003 or 2005 (cheap/free). <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Let me know if you want
to try it out (it’s a ‘beta’ ;-) ).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Werner<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
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face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-GB
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>De :</span></font></b><font
size=2 face=Tahoma><span lang=EN-GB style='font-size:10.0pt;font-family:Tahoma'>
James S. McNeill [mailto:James.Mcneill@Colorado.EDU] <br>
<b><span style='font-weight:bold'>Envoyé :</span></b> samedi <st1:date
Year="2008" Day="4" Month="10" ls="trans" w:st="on">4 octobre 2008</st1:date>
01</span></font><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>:35<br>
<b><span style='font-weight:bold'>À :</span></b> trnsys-users@cae.wisc.edu<br>
<b><span style='font-weight:bold'>Objet :</span></b> [TRNSYS-users] Type
155 Simulation Speed</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>I am currently using the Type 155 to find roots of several
functions. There are 18 inputs and 8 outputs connected to the Type
155. The simulation requires almost 10 times longer to complete when I
have this model attached. Is there an communication bottleneck between
Matlab and TRNSYS? I am planning a large parametric study and need to
find ways to speed up the simulation.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>Thanks.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>James McNeill<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:PlaceType w:st="on"><font size=2
face=Calibri><span lang=EN-US style='font-size:10.0pt'>University</span></font></st1:PlaceType><font
size=2><span lang=EN-US style='font-size:10.0pt'> of <st1:PlaceName w:st="on">Colorado</st1:PlaceName></span></font></st1:place><font
size=2><span lang=EN-US style='font-size:10.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
10.0pt'>Dept. of Civil, Env., and Architectural Engineering<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
10.0pt'>Building Systems Program<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
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