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           45 : MSCFModel_KraussPS::MSCFModel_KraussPS(const MSVehicleType* vtype) :
      36           45 :     MSCFModel_Krauss(vtype) {
      37           45 : }
      38              : 
      39              : 
      40           90 : MSCFModel_KraussPS::~MSCFModel_KraussPS() {}
      41              : 
      42              : 
      43              : double
      44     45637047 : MSCFModel_KraussPS::maxNextSpeed(double speed, const MSVehicle* const veh) const {
      45     45637047 :     const double aMax = MAX2(0., getMaxAccel() - GRAVITY * sin(DEG2RAD(veh->getSlope())));
      46              :     // assuming drag force is proportional to the square of speed
      47     45637047 :     const double vMax = MAX2(
      48     45637047 :                             sqrt(aMax / getMaxAccel()) * myType->getMaxSpeed(),
      49              :                             // prevent emergency braking when inclination changes suddenly (momentum)
      50     45637047 :                             speed - ACCEL2SPEED(getMaxDecel()));
      51     45637047 :     return MAX2(
      52              :                // prevent stalling at low speed
      53              :                getMaxAccel() / 2,
      54     45637047 :                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              : /****************************************************************************/