.Buildings.Obsolete.Controls.OBC.CDL.Logical.TrueHold .Buildings.Obsolete.Controls.OBC.CDL.Logical.TrueHoldBlock that holds a true input signal for at least a
defined time period.
At initialization, the output y is equal to the
input u. If the input u becomes
true, or is true during intialization, a
timer starts and the Boolean output y stays
true for the time period provided by the parameter
duration. When this time is elapsed, the input is
checked again. If it is true, then the timer is
restarted and the output remains true for another
duration seconds. If the input u is
false after holdTime seconds, then the
ouput is switched to false, until the input becomes
true again.
The figure below shows the state chart of the implementation. Note that the transition are done in zero time.
The figure below shows an example with a hold time of 3600 seconds and a pulse width period 9000 seconds that starts at t=200 seconds.
The figure below shows an example with a hold time of 60 seconds and a pulse width period 3600 seconds that starts at t=0 seconds.
The next two figures show the same experiment, except that the
input u has been negated. The figure below has again a
hold time of 3600 seconds and a pulse width period
9000 seconds that starts at t=200 seconds.
The figure below has again a hold time of 60 seconds and a pulse width period 3600 seconds that starts at t=0 seconds.
Obsolete package.TrueHoldWithReset to
TrueHold.Modelica.Units.SI.