Line data    Source code

       1             : /****************************************************************************/
       2             : // Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.dev/sumo
       3             : // Copyright (C) 2001-2024 German Aerospace Center (DLR) and others.
       4             : // This program and the accompanying materials are made available under the
       5             : // terms of the Eclipse Public License 2.0 which is available at
       6             : // https://www.eclipse.org/legal/epl-2.0/
       7             : // This Source Code may also be made available under the following Secondary
       8             : // Licenses when the conditions for such availability set forth in the Eclipse
       9             : // Public License 2.0 are satisfied: GNU General Public License, version 2
      10             : // or later which is available at
      11             : // https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
      12             : // SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
      13             : /****************************************************************************/
      14             : /// @file    MSCFModel_KraussPS.cpp
      15             : /// @author  Tobias Mayer
      16             : /// @author  Daniel Krajzewicz
      17             : /// @author  Jakob Erdmann
      18             : /// @author  Michael Behrisch
      19             : /// @author  Laura Bieker
      20             : /// @date    Mon, 04 Aug 2009
      21             : ///
      22             : // Krauss car-following model, changing accel and speed by slope
      23             : /****************************************************************************/
      24             : #include <config.h>
      25             : 
      26             : #include <utils/geom/GeomHelper.h>
      27             : #include <microsim/MSVehicle.h>
      28             : #include <microsim/MSLane.h>
      29             : #include "MSCFModel_KraussPS.h"
      30             : 
      31             : 
      32             : // ===========================================================================
      33             : // method definitions
      34             : // ===========================================================================
      35          49 : MSCFModel_KraussPS::MSCFModel_KraussPS(const MSVehicleType* vtype) :
      36          49 :     MSCFModel_Krauss(vtype) {
      37          49 : }
      38             : 
      39             : 
      40          98 : MSCFModel_KraussPS::~MSCFModel_KraussPS() {}
      41             : 
      42             : 
      43             : double
      44    45740009 : MSCFModel_KraussPS::maxNextSpeed(double speed, const MSVehicle* const veh) const {
      45    45740009 :     const double aMax = MAX2(0., getMaxAccel() - GRAVITY * sin(DEG2RAD(veh->getSlope())));
      46             :     // assuming drag force is proportional to the square of speed
      47    45740009 :     const double vMax = MAX2(
      48    45740009 :                             sqrt(aMax / getMaxAccel()) * myType->getMaxSpeed(),
      49             :                             // prevent emergency braking when inclination changes suddenly (momentum)
      50    45740009 :                             speed - ACCEL2SPEED(getMaxDecel()));
      51    45740009 :     return MAX2(
      52             :                // prevent stalling at low speed
      53             :                getMaxAccel() / 2,
      54    45740009 :                MIN2(speed + ACCEL2SPEED(aMax), vMax));
      55             : }
      56             : 
      57             : 
      58             : MSCFModel*
      59           0 : MSCFModel_KraussPS::duplicate(const MSVehicleType* vtype) const {
      60           0 :     return new MSCFModel_KraussPS(vtype);
      61             : }
      62             : 
      63             : 
      64             : /****************************************************************************/