SUMO - Simulation of Urban MObility
MSCFModel_Wiedemann.h
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00001 /****************************************************************************/
00008 // The psycho-physical model of Wiedemann
00009 /****************************************************************************/
00010 // SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
00011 // Copyright (C) 2001-2012 DLR (http://www.dlr.de/) and contributors
00012 /****************************************************************************/
00013 //
00014 //   This file is part of SUMO.
00015 //   SUMO is free software: you can redistribute it and/or modify
00016 //   it under the terms of the GNU General Public License as published by
00017 //   the Free Software Foundation, either version 3 of the License, or
00018 //   (at your option) any later version.
00019 //
00020 /****************************************************************************/
00021 #ifndef MSCFModel_Wiedemann_H
00022 #define MSCFModel_Wiedemann_H
00023 
00024 // ===========================================================================
00025 // included modules
00026 // ===========================================================================
00027 #ifdef _MSC_VER
00028 #include <windows_config.h>
00029 #else
00030 #include <config.h>
00031 #endif
00032 
00033 #include <microsim/MSCFModel.h>
00034 #include <microsim/MSLane.h>
00035 #include <microsim/MSVehicle.h>
00036 #include <microsim/MSVehicleType.h>
00037 #include <utils/xml/SUMOXMLDefinitions.h>
00038 
00039 
00040 // ===========================================================================
00041 // class definitions
00042 // ===========================================================================
00047 class MSCFModel_Wiedemann : public MSCFModel {
00048 public:
00049 
00060     MSCFModel_Wiedemann(const MSVehicleType* vtype,
00061                         SUMOReal accel, SUMOReal decel,
00062                         SUMOReal security, SUMOReal estimation);
00063 
00064 
00066     ~MSCFModel_Wiedemann();
00067 
00068 
00071 
00077     SUMOReal moveHelper(MSVehicle* const veh, SUMOReal vPos) const;
00078 
00079 
00088     SUMOReal followSpeed(const MSVehicle* const veh, SUMOReal speed, SUMOReal gap2pred, SUMOReal predSpeed, SUMOReal predMaxDecel) const;
00089 
00090 
00098     SUMOReal stopSpeed(const MSVehicle* const veh, SUMOReal gap) const;
00099 
00100 
00110     SUMOReal interactionGap(const MSVehicle* const , SUMOReal vL) const;
00111 
00112 
00117     int getModelID() const {
00118         return SUMO_TAG_CF_WIEDEMANN;
00119     }
00120 
00121 
00126     MSCFModel* duplicate(const MSVehicleType* vtype) const;
00127 
00128 
00129     VehicleVariables* createVehicleVariables() const {
00130         return new VehicleVariables();
00131     }
00133 
00134 
00135 private:
00136     class VehicleVariables : public MSCFModel::VehicleVariables {
00137     public:
00138         VehicleVariables() : accelSign(1) {}
00140         SUMOReal accelSign;
00141     };
00142 
00143 
00144 private:
00145     /* @brief the main enty point for the speed computation
00146      * @param[in] gap The netto gap (front bumper of ego to back bumper of leader)
00147      */
00148     SUMOReal _v(const MSVehicle* veh, SUMOReal predSpeed, SUMOReal gap) const;
00149 
00152     SUMOReal fullspeed(SUMOReal v, SUMOReal vpref, SUMOReal dx, SUMOReal bx) const; // also 'WUNSCH'
00153     SUMOReal following(SUMOReal sign) const; // also 'FOLGEN'
00154     SUMOReal approaching(SUMOReal dv, SUMOReal dx, SUMOReal bx) const;  // also 'BREMSBX'
00155     SUMOReal emergency(SUMOReal dv, SUMOReal dx) const; // also 'BREMSAX'
00157 
00158 private:
00161 
00163     const SUMOReal mySecurity;
00164 
00166     const SUMOReal myEstimation;
00167 
00169     const SUMOReal myAX;
00170 
00172     const SUMOReal myCX;
00173 
00175     const SUMOReal myMinAccel;
00176 
00178     static const SUMOReal D_MAX;
00180 
00182     // standing obstacles (see MSCFModel_Krauss::_vsafe)
00183     SUMOReal krauss_vsafe(SUMOReal gap, SUMOReal predSpeed) const;
00184 };
00185 
00186 #endif  /* MSCFModel_Wiedemann_H */
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