%info@http:://golem.fjfi.cvut.cz/wiki/root/GW4reports

\def\GWslide{\slide{PID}{
\GWigwc{1}{Theory/TokamakTechnology/RealTimeManagament/PID/fig/fig.pdf}{wiki:PID}\href{https://en.wikipedia.org/wiki/PID_controller}{\beamergotobutton{PID@Wiki}}
\begin{itemize}
\item $r(t)$: desired setpoint.
\item $y(t)$: measured process variable.
\item $e(t)$: error value.
\item $u(t)$: control variable.
\end{itemize} 
}}