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## Copyright (C) 1997, 2000, 2004, 2005, 2006, 2007 Kai P. Mueller
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## This program is free software; you can redistribute it and/or modify it
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## under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 3 of the License, or (at
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## your option) any later version.
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## This program is distributed in the hope that it will be useful, but
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## WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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## General Public License for more details.
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## You should have received a copy of the GNU General Public License
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## along with this program; see the file COPYING. If not, see
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## <http://www.gnu.org/licenses/>.
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## @deftypefn {Function File} {@var{sys} =} jet707 ()
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## Creates a linearized state-space model of a Boeing 707-321 aircraft
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## ($M = 0.26$, $G_{a0} = -3^{\circ}$, ${\alpha}_0 = 4^{\circ}$, ${\kappa}= 50^{\circ}$).
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## (@var{M} = 0.26, @var{Ga0} = -3 deg, @var{alpha0} = 4 deg, @var{kappa} = 50 deg).
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## System inputs: (1) thrust and (2) elevator angle.
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## System outputs: (1) airspeed and (2) pitch angle.
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## @strong{Reference}: R. Brockhaus: @cite{Flugregelung} (Flight
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## Control), Springer, 1994.
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## Author: Kai P. Mueller <mueller@ifr.ing.tu-bs.de>
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## Created: September 28, 1997
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function outsys = jet707 ()
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a = [-0.46E-01, 0.10681415316, 0.0, -0.17121680433;
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-0.1675901504661613, -0.515, 1.0, 0.6420630320636088E-02;
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0.1543104215347786, -0.547945, -0.906, -0.1521689385990753E-02;
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b = [0.1602300107479095, 0.2111848453E-02;
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0.8196877780963616E-02, -0.3025E-01;
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0.9173594317692437E-01, -0.75283075;
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c = [1.0, 0.0, 0.0, 0.0;
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inam = {"thrust"; "rudder"};
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onam = {"speed"; "pitch"};
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snam = {"x1"; "x2"; "x3"; "x4"};
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outsys = ss (a, b, c, d, 0.0, 4, 0, snam, inam, onam);