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jet707.m
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1999-04-29
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# Copyright (C) 1997 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, 675 Mass Ave, Cambridge, MA 02139, USA.
function outsys = jet707()
# function outsys = jet707()
# Creates linearized state space model of a Boeing 707-321 aircraft
# at v=80m/s. (M = 0.26, Ga0 = -3 deg, alpha0 = 4 deg, kappa = 50 deg)
# System inputs: (1) thrust and (2) elevator angle
# System outputs: (1) airspeed and (2) pitch angle
# Ref: R. Brockhaus: Flugregelung (Flight Control), Springer, 1994
#
# see also: ord2
# Written by Kai P. Mueller September 28, 1997
# Updates
if (nargin != 0)
usage("outsys = jet707()")
endif
if (nargin > 1)
usage("outsys = jet707()")
endif
a = [ -0.46E-01, 0.10681415316, 0.0, -0.17121680433;
-0.1675901504661613, -0.515, 1.0, 0.6420630320636088E-02;
0.1543104215347786, -0.547945, -0.906, -0.1521689385990753E-02;
0.0, 0.0, 1.0, 0.0 ];
b = [ 0.1602300107479095, 0.2111848453E-02;
0.8196877780963616E-02, -0.3025E-01;
0.9173594317692437E-01, -0.75283075;
0.0, 0.0 ];
c = [ 1.0, 0.0, 0.0, 0.0;
0.0, 0.0, 0.0, 1.0 ];
d=zeros(2,2);
inam = ["thrust"; "rudder"];
onam = ["speed"; "pitch"];
snam = ["x1"; "x2"; "x3"; "x4"];
outsys = ss2sys(a, b, c, d, 0.0, 4, 0, snam, inam, onam);
endfunction