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

\drawdim in \linewd 0.015 \setunitscale 0.7
\arrowheadtype t:F
\arrowheadsize l:0.16 w:0.08

%begin arrow
\move(0.03 -2.57)
\avec(5.53 -2.57)
%end arrow
%begin arrow
\move(2.77 -2.57)
\avec(2.77 -0.02)
%end arrow

%begin line
\lpatt(0.03 0.05)
\move(0.22 -2.57)
\lvec(4.30 -0.53)
\lpatt()
%end line
%begin arrow
\move(2.77 -2.57)
\avec(4.81 -1.55)
%end arrow
%begin arrow
\move(2.77 -2.57)
\avec(0.73 -1.55)
%end arrow
%begin arrow
\move(2.78 -2.56)
\avec(3.19 -0.34)
%end arrow

%begin line
\lpatt(0.03 0.05)
\move(0.74 -1.56)
\lvec(3.19 -0.37)
\lpatt()
%end line
%begin textrectangle
\textref h:C v:C
\htext (2.48 -0.15){$e_2$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (1.49 -0.58){$U_{\perp}$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (5.30 -2.77){$e_1$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (2.81 -2.77){$\boldsymbol{0}$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (0.42 -2.77){$y_{\mathrm{r}}$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (0.69 -1.75){$a_{\mathrm{r}}$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (3.50 -0.38){$a$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (4.59 -0.55){$y$}
%end textrectangle
%begin textrectangle
\textref h:C v:C
\htext (4.84 -1.41){$u$}
%end textrectangle

\drawdim in \linewd 0.035
\arrowheadtype t:W
\arrowheadsize l:0.16 w:0.08

%begin arrow
\move(2.77 -2.57)
\avec(4.30 -0.53)
%end arrow
%begin arrow
\move(2.77 -2.57)
\avec(0.22 -2.57)
%end arrow

\drawdim in \linewd 0.045
\arrowheadtype t:W
\arrowheadsize l:0.2 w:0.1

%begin arrow
\move(2.77 -2.57)
\avec(1.75 -0.53)
%end arrow

\end{texdraw}
\end{center}