home *** CD-ROM | disk | FTP | other *** search
- ## Copyright (C) 1998 Kai P. Mueller
- ##
- ## This file is part of Octave.
- ##
- ## Octave is free software; you can redistribute it and/or modify it
- ## under the terms of the GNU General Public License as published by the
- ## Free Software Foundation; either version 2, or (at your option) any
- ## later version.
- ##
- ## Octave is distributed in the hope that it will be useful, but WITHOUT
- ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- ## for more details.
- ##
- ## You should have received a copy of the GNU General Public License
- ## along with Octave; see the file COPYING. If not, write to the Free
- ## Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
-
- ## -*- texinfo -*-
- ## @deftypefn {Function File } { @var{wsys} =} wgt1o (@var{vl}, @var{vh}, @var{fc})
- ## State space description of a first order weighting function.
- ##
- ## Weighting function are needed by the H2/H_infinity design procedure.
- ## These function are part of thye augmented plant P (see hinfdemo
- ## for an applicattion example).
- ##
- ## vl = Gain @@ low frequencies
- ##
- ## vh = Gain @@ high frequencies
- ##
- ## fc = Corner frequency (in Hz, *not* in rad/sec)
- ## @end deftypefn
-
- function wsys = wgt1o (vl, vh, fc)
- ## Written by Kai P. Mueller September 30, 1997
-
- if (nargin != 3)
- usage("wsys = wgt1o(vl, vh, fc)");
- endif
-
- if(nargout > 1)
- usage("wsys = wgt1o(vl, vh, fc)");
- endif
-
- if (vl == vh)
- a = [];
- b = [];
- c = [];
- else
- a = [-2*pi*fc];
- b = [-2*pi*fc];
- c = [vh-vl];
- endif
- d=[vh];
-
- wsys = ss2sys(a,b,c,d);
- endfunction
-