1 files changed, 34 insertions, 0 deletions
diff --git a/modules/cacsd/macros/minss.sci b/modules/cacsd/macros/minss.sci
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+++ b/modules/cacsd/macros/minss.sci
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+// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+// Copyright (C) INRIA -
+//
+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution.  The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
+
+function Slmin=minss(Sl,tol)
+
+    [lhs,rhs]=argn(0)
+
+    if typeof(Sl)<>"state-space" then
+        error(msprintf(gettext("%s: Wrong type for input argument #%d: State-space form expected.\n"),"minss",1));
+    end
+
+    [a,b,c,d,x0,dom]=Sl(2:7)
+    //observability
+    if rhs<2 then tol=1.d-10*norm([a;c],1),end
+    [nc,u1]=contr(a',c',tol)
+    u=u1(:,1:nc)
+    c=c*u;a=u'*a*u;b=u'*b,x0=u'*x0;
+
+    //controllability
+    if rhs<2 then tol=1.d-10*norm([a,b],1),end
+    [no,u2]=contr(a,b,tol)
+    u=u2(:,1:no)
+    a=u'*a*u;b=u'*b;c=c*u
+
+    //form the result
+    Slmin=syslin(dom,a,b,c,d,u'*x0)
+    //Would be nice to return U=U1*U2
+endfunction