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1   package org.opentrafficsim.road.gtu.perception.mental.channel;
2   
3   import org.opentrafficsim.base.parameters.ParameterException;
4   import org.opentrafficsim.base.parameters.ParameterTypeDouble;
5   import org.opentrafficsim.base.parameters.ParameterTypes;
6   import org.opentrafficsim.base.parameters.Parameters;
7   import org.opentrafficsim.road.gtu.perception.mental.AdaptationSpeed;
8   import org.opentrafficsim.road.gtu.perception.mental.FactorAdaptation;
9   
10  /**
11   * Reduces the desired speed as behavioral adaptation. The equation is v0 = v0_base * min(1, 1/(1+Beta_v0*(TS-1))).
12   * <p>
13   * Copyright (c) 2024-2026 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
14   * BSD-style license. See <a href="https://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
15   * </p>
16   * @author Wouter Schakel
17   */
18  public class AdaptationSpeedChannel extends FactorAdaptation
19  {
20  
21      /** Parameter for desired speed scaling. */
22      public static final ParameterTypeDouble BETA_V0 = AdaptationSpeed.BETA_V0;
23  
24      /** Base value for the desired speed. */
25      private Double fSpeed0;
26  
27      /** Base value for the desired speed relative to GTU type speed limit. */
28      private Double fSpeedGtu0;
29  
30      /**
31       * Constructor.
32       */
33      public AdaptationSpeedChannel()
34      {
35          //
36      }
37  
38      /** {@inheritDoc} */
39      @Override
40      public void adapt(final Parameters parameters) throws ParameterException
41      {
42          if (this.fSpeed0 == null)
43          {
44              this.fSpeed0 = parameters.getParameter(ParameterTypes.FSPEED);
45              this.fSpeedGtu0 = parameters.getParameter(ParameterTypes.FSPEED_GTU);
46          }
47          double factor = getFactor(parameters, BETA_V0);
48          parameters.setClaimedParameter(ParameterTypes.FSPEED, this.fSpeed0 / factor, this);
49          parameters.setClaimedParameter(ParameterTypes.FSPEED_GTU, this.fSpeedGtu0 / factor, this);
50      }
51  
52  }