.Buildings.Occupants.BaseClasses.weibullVariableGeneration

Information

This function generates a random variable, from a Weibull distribution with the inputs of lambda and k. The random variable might be the duration of a specific event, for instance the time to keep the HVAC on.

The inputs lambda and k defines the probability density function. lambda is similar to the mean value of exponential distribution, and k defines the shape. A value of k = 1 means the Weibull distribution reduces to an exponential distribution. Genrally speaking, higher lambda and higher k indicate a higher chance to generate a higher output.

Interface

function weibullVariableGeneration
  extends Modelica.Icons.Function;
  input Real lambda "Parameter defining the Weibull distribution scale factor";
  input Real k "Parameter defining the Weibull distribution shape factor";
  input Integer stateIn[Modelica.Math.Random.Generators.Xorshift1024star.nState] "State of the random number generator";
  output Real y "Random variable generated from Weibull Distribution";
  output Integer stateOut[Modelica.Math.Random.Generators.Xorshift1024star.nState] "New state of the random number generator";
end weibullVariableGeneration;

Revisions

• December 6, 2024, by Michael Wetter:
  Refactored implementation of random number calculations, transfering the local state of the random number generator from one call to the next.
  This is for #4069.
• October 3, 2023, by Michael Wetter:
  Initialized localSeed.
  This is for #3549.
• July 20, 2018, by Zhe Wang:
  First implementation.