#! /bin/sh
######################################
##### Model Transformation Tools #####
######################################
# Bourne shell script: dm2fr_m
# Transformation: descriptor matrix to frequency response
# Copyright (c) P.J.Gawthrop, 1996.
###############################################################
## Version control history
###############################################################
## $Id$
## $Log$
## Revision 1.6 1996/08/16 14:26:07 peter
## Fixed multi-output bug.
## Made sure that u0 is ok.
##
## Revision 1.5 1996/08/15 16:23:02 peter
## Now uses W in place of w for consistancy with time responses.
##
## Revision 1.4 1996/08/15 11:52:42 peter
## Now creats a number of versions:
## fr complex frequency response
## lmfr log magnitude of fr
## lpfr phase of fr
## nyfr real and imag parts - Nyquist style
## nifr Nichols style.
##
## Revision 1.3 1996/08/11 19:08:08 peter
## Parameter passing now enabled.
##
## Revision 1.2 1996/08/11 09:32:12 peter
## Now takes the numpar parameters correctly
##
## Revision 1.1 1996/08/10 14:11:11 peter
## Initial revision
##
###############################################################
echo Creating $1_fr.m
echo Creating $1_lmfr.m
echo Creating $1_lpfr.m
echo Creating $1_nyfr.m
echo Creating $1_nifr.m
if [ "$2" = "" ];
then
PARAMS='W=logspace(-1,2,100); u0=zeros(nu,1); u0(1)=1;'
echo Using default parameter $PARAMS
else
PARAMS=$2;
fi
$MATRIX << EOF > dm2fr_m.log 2>mtt_error
$1_numpar;
[nx,ny,nu,nz,nyz] = $1_def;
$PARAMS
%Defaults
if exist('W')==0
W = logspace(-1,2,100)';
end;
if exist('u0')==0
u0 = zeros(nu,1);
u0(1) = 1;
end;
[n,m]=size(W);
if m>n
W=W';
end;
[A,B,C,D,E] = $1_dm;
fr = dm2fr(A,B,C,D,E,W,u0);
lw = log10(W);
lmfr = log10(abs(fr));
pfr = angle(fr)*180/pi;
% Complex frequency response
write_matrix([W fr], '$1_fr');
% Log magnitude v log frequency
write_matrix([lw lmfr], '$1_lmfr');
% Angle v log frequency
write_matrix([lw pfr], '$1_lpfr');
% Nyquist style
re = real(fr);
im = imag(fr);
nyq = [re(:,1) im(:,1)];
for i = 2:ny
nyq = [nyq re(:,i) im(:,i)]
end;
write_matrix(nyq, '$1_nyfr');
% Nichols style
re = lmfr;
im = pfr;
nic = [im(:,1) re(:,1)];
for i = 2:ny
nic = [nic im(:,i) re(:,i)]
end;
write_matrix(nic, '$1_nifr');
EOF
# Test for errors and print if any
err_length=$(wc -c <mtt_error)
if [ $err_length != "0" ]
then
echo MTT has failed with the following errors '...'
cat mtt_error
exit 1
else
exit 0
fi