122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
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/**********************************************************************
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FILENAME: uiuc_engine.cpp
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----------------------------------------------------------------------
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DESCRIPTION: determine the engine forces and moments
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----------------------------------------------------------------------
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STATUS: alpha version
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----------------------------------------------------------------------
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REFERENCES: based on portions of c172_engine.c, called from ls_model
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----------------------------------------------------------------------
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HISTORY: 01/30/2000 initial release
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----------------------------------------------------------------------
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AUTHOR(S): Bipin Sehgal <bsehgal@uiuc.edu>
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Jeff Scott <jscott@mail.com>
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Michael Selig <m-selig@uiuc.edu>
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----------------------------------------------------------------------
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VARIABLES:
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----------------------------------------------------------------------
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INPUTS: -engine model
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----------------------------------------------------------------------
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OUTPUTS: -F_X_engine
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-F_Z_engine
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-M_m_engine
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----------------------------------------------------------------------
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CALLED BY: uiuc_wrapper.cpp
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----------------------------------------------------------------------
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CALLS TO: none
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----------------------------------------------------------------------
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COPYRIGHT: (C) 2000 by Michael Selig
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU 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; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA or view http://www.gnu.org/copyleft/gpl.html.
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**********************************************************************/
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#include "uiuc_engine.h"
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void uiuc_engine()
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{
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stack command_list;
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string linetoken1;
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string linetoken2;
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/* [] mss questions: why do this here ... and then undo it later?
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... does Throttle[3] get modified? */
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Throttle[3] = Throttle_pct;
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command_list = engineParts -> getCommands();
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if (command_list.begin() == command_list.end())
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{
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cerr << "ERROR: Engine not specified. Aircraft cannot fly without the engine" << endl;
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exit(-1);
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}
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for (LIST command_line = command_list.begin(); command_line!=command_list.end(); ++command_line)
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{
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//cout << *command_line << endl;
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linetoken1 = engineParts -> getToken(*command_line, 1); // function parameters gettoken(string,tokenNo);
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linetoken2 = engineParts -> getToken(*command_line, 2); // 2 represents token No 2
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switch(engine_map[linetoken2])
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{
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case simpleSingle_flag:
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{
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//c172 engine lines ... looks like 0.83 is just a thrust reduction
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/* F_X_engine = Throttle[3]*350/0.83; */
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/* F_Z_engine = Throttle[3]*4.9/0.83; */
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/* M_m_engine = F_X_engine*0.734*cbar; */
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F_X_engine = Throttle[3]*simpleSingleMaxThrust;
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break;
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}
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case c172_flag:
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{
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F_X_engine = Throttle[3]*350/0.83;
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F_Z_engine = Throttle[3]*4.9/0.83;
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M_m_engine = F_X_engine*0.734*cbar;
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break;
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}
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};
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Throttle_pct = Throttle[3];
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return;
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}
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}
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// end uiuc_engine.cpp
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