This information is part of the Modelica Standard Library maintained by the Modelica Association.
This block calculates the empirical variance of its input signal. It is based on the formula (but implemented in a more reliable numerical way):
y = mean( (u - mean(u))^2 )
The parameter t_eps is used to guard against division by zero (the variance computation starts at <simulation start time> + t_eps and before that time instant y = 0).
The variance of a signal is also equal to its mean power.
Type: Time (s)
Description: Variance calculation starts at startTime + t_eps
Calculates the empirical standard deviation of its input signal