\begin{center}
\begin{texdraw}
%\setunitscale 0.3

\drawdim in \linewd 0.015 \setunitscale 0.8
\arrowheadtype t:F
\arrowheadsize l:0.16 w:0.08

%begin arrow
\move(0.53 -1.55)
\avec(4.10 -1.55)
%end arrow
%begin arrow
\move(2.06 -1.55)
\avec(2.06 -0.02)
%end arrow
%begin arrow
\move(2.06 -1.55)
\avec(3.59 -0.53)
%end arrow
%begin arrow
\move(2.06 -1.55)
\avec(0.53 -0.53)
%end arrow
%begin arrow
\move(3.59 -0.53)
\avec(0.53 -0.53)
%end arrow

%begin line
\lpatt(0.03 0.05)
\move(3.59 -0.53)
\lvec(3.59 -1.55)
\lpatt()
%end line

%begin line
\lpatt(0.03 0.05)
\move(0.53 -0.53)
\lvec(0.53 -1.55)
\lpatt()
%end line
%begin arrow
\move(2.06 -1.55)
\avec(2.06 -0.53)
%end arrow
%begin textrectangle
\textref h:C v:C
\htext (1.83 -0.15){$U_{\perp}$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (0.96 -0.30){$y_{\mathrm{r}}-y$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (0.92 -1.02){$y_{\mathrm{r}}$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (2.27 -0.70){$v$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (3.23 -1.01){$y$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (3.19 -1.77){$(y\bigm|u)$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (4.07 -1.39){$u$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (0.96 -1.77){$-(y\bigm|u)$}
%end textrectangle
%begin arrow
\move(2.06 -1.55)
\avec(3.59 -1.55)
%end arrow
%begin arrow
\move(2.06 -1.55)
\avec(0.53 -1.55)
%end arrow
%begin textrectangle
\textref h:C v:C
\htext (2.09 -1.77){$\boldsymbol{0}$}
%end textrectangle
\end{texdraw}
\end{center}