BuildSysPro.IBPSA.Utilities.Math.Functions.smoothExponential

# .BuildSysPro.IBPSA.Utilities.Math.Functions.smoothExponential

Once continuously differentiable approximation to exp(-|x|) in interval |x| < delta

## Information

Function to provide a once continuously differentiable approximation to exp(- |x| ) in the interval |x| < δ for some positive δ

#### Interface

>     function smoothExponential
>       extends Modelica.Icons.Function;
>       input Real x "Input argument";
>       input Real delta "Transition point where approximation occurs";
>       output Real y "Output argument";
>     end smoothExponential;

## Revisions

- October 30, 2008, by Michael Wetter:
  First implementation.

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