目前,我有类似的东西
\begin{tikzpicture}
\node [draw=black,
minimum width=3cm,
minimum height=1.2cm,
] (controller) {1};
\node [draw=black,
minimum width=3cm,
minimum height=1.2cm,
right=0.8cm of controller
] (sensor) {2};
\node [draw=black,
minimum width=3cm,
minimum height=1.2cm,
right=0.8cm of sensor
] (system) {3};
\draw[-stealth] (system.south) -- +(0,-0.39) -| node[pos=0.25,above]{x} (sensor.south);
\draw[-stealth] (controller.east) -- node[pos=0.5,above]{$u_{no}$} (sensor.west);
\draw[-stealth] (sensor.east) -- node[pos=0.5,above]{$u$} (system.west);
\draw[-stealth] (system.east) -- ++ (1.25,0)
node[midway](output){}node[midway,above]{$y_{out}$};
\draw[-stealth] (output.center) -- +(0,-1.5) -| node[pos=0.25,above]{} (controller.west);
\end{tikzpicture}
我应该如何更改才能使我的第一个块具有像这里一样的两个输入?如何添加另一个?如何将其定位好?如何更改此现有节点以使其不直接靠近块?
答案1
删除最后一行代码
\draw[-stealth] (output.center) -- +(0,-1.5) -| node[pos=0.25,above]{} (controller.west);
并添加以下两行
\draw[-stealth] (output.center) -- +(0,-1.5) -| node[pos=0.25,above]{} ($(controller.west)+(-2ex,-2ex)$) -- ($(controller.west)+(0ex,-2ex)$);
\draw[-stealth] ($(controller.west) + (-4ex,0ex)$) -- (controller.west) ;
\documentclass{scrreprt}
\usepackage{tikz}
\usetikzlibrary{positioning,fit,calc,backgrounds}
\begin{document}
\begin{tikzpicture}
\node [draw=black,
minimum width=3cm,
minimum height=1.2cm,
] (controller) {1};
\node [draw=black,
minimum width=3cm,
minimum height=1.2cm,
right=0.8cm of controller
] (sensor) {2};
\node [draw=black,
minimum width=3cm,
minimum height=1.2cm,
right=0.8cm of sensor
] (system) {3};
\draw[-stealth] (system.south) -- +(0,-0.39) -| node[pos=0.25,above]{x} (sensor.south);
\draw[-stealth] (controller.east) -- node[pos=0.5,above]{$u_{no}$} (sensor.west);
\draw[-stealth] (sensor.east) -- node[pos=0.5,above]{$u$} (system.west);
\draw[-stealth] (system.east) -- ++ (1.25,0)
node[midway](output){}node[midway,above]{$y_{out}$};
\draw[-stealth] (output.center) -- +(0,-1.5) -| node[pos=0.25,above]{} ($(controller.west)+(-2ex,-2ex)$) -- ($(controller.west)+(0ex,-2ex)$);
\draw[-stealth] ($(controller.west) + (-4ex,0ex)$) -- (controller.west) ;
\end{tikzpicture}
\end{document}