## Temperature Controller Simulation

### Instructions

The parameters are described elsewhere, with
links to explanations and definitions in
the main document. Their values in the boxes can be edited in the usual way.
With the present values the set-point
temperature *T*_{s} will stay at $StartTset $units until $StartTime
s into the simulation when it will ramp linearly to $StopTset $units at $StopTime s.
Either On-Off or PID controllers can be
selected with the first menu which also has an option "PID Bode"
to display the frequency-domain response of the PID system. The second menu
changes the temperature units.

On the time-domain displays the red line is the set-point temperature,
*T*_{s}, the green
line is the oven temperature, *T*_{o}, and the blue line is the
heater power,
*W*.
On the frequency-domain displays the red curve is the open-loop gain of the
system, and the
black curve is its phase. The blue curve is the response of the oven temperature
*T*_{o}
to changes in heater power *W* and the green curve is the closed-loop
response of the oven temperature to changes in the set-point temperature
*T*_{s}.
There is a more technical discussion of aspects
of this simulation available.

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