src/FDM/JSBSim/models/flight_control/FGSummer.h

   1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2
   3  Header:       FGSummer.h
   4  Author:
   5  Date started:
   6
   7  ------------- Copyright (C)  -------------
   8
   9  This program is free software; you can redistribute it and/or modify it under
  10  the terms of the GNU Lesser General Public License as published by the Free Software
  11  Foundation; either version 2 of the License, or (at your option) any later
  12  version.
  13
  14  This program is distributed in the hope that it will be useful, but WITHOUT
  15  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  16  FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
  17  details.
  18
  19  You should have received a copy of the GNU Lesser General Public License along with
  20  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  21  Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23  Further information about the GNU Lesser General Public License can also be found on
  24  the world wide web at http://www.gnu.org.
  25
  26 HISTORY
  27 --------------------------------------------------------------------------------
  28
  29 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  30 SENTRY
  31 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  32
  33 #ifndef FGSUMMER_H
  34 #define FGSUMMER_H
  35
  36 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  37 INCLUDES
  38 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  39
  40 #include "FGFCSComponent.h"
  41
  42 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  43 DEFINITIONS
  44 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  45
  46 #define ID_SUMMER "$Id$"
  47
  48 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  49 FORWARD DECLARATIONS
  50 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  51
  52 namespace JSBSim {
  53
  54 class Element;
  55
  56 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  57 CLASS DOCUMENTATION
  58 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  59
  60 /** Models a flight control system summing component.
  61     The Summer component sums two or more inputs. These can be pilot control
  62     inputs or state variables, and a bias can also be added in using the BIAS
  63     keyword.  The form of the summer component specification is:
  64 @code
  65     <summer name="{string}">
  66       <input> {string} </input>
  67       <input> {string} </input>
  68       <bias> {number} </bias>
  69       <clipto>
  70          <min> {number} </min>
  71          <max> {number} </max>
  72       </clipto>
  73       <output> {string} </output>
  74     </summer>
  75 @endcode
  76
  77     Note that in the case of an input property the property name may be
  78     immediately preceded by a minus sign. Here's an example of a summer
  79     component specification:
  80
  81 @code
  82     <summer name="Roll A/P Error summer">
  83       <input> velocities/p-rad_sec </input>
  84       <input> -fcs/roll-ap-wing-leveler </input>
  85       <input> fcs/roll-ap-error-integrator </input>
  86       <clipto>
  87          <min> -1 </min>
  88          <max>  1 </max>
  89       </clipto>
  90     </summer>
  91 @endcode
  92
  93 <pre>
  94     Notes:
  95
  96     There can be only one BIAS statement per component.
  97
  98     There may be any number of inputs.
  99 </pre>
 100
 101     @author Jon S. Berndt
 102     @version $Id$
 103 */
 104
 105 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 106 CLASS DECLARATION
 107 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 108
 109 class FGSummer  : public FGFCSComponent
 110 {
 111 public:
 112   /** Constructor.
 113       @param fcs a pointer to the parent FGFCS object.
 114       @param element a pointer to the configuration file node. */
 115   FGSummer(FGFCS* fcs, Element* element);
 116   /// Destructor
 117   ~FGSummer();
 118
 119   /// The execution method for this FCS component.
 120   bool Run(void);
 121
 122 private:
 123   double Bias;
 124   void Debug(int from);
 125 };
 126 }
 127 #endif