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在节点上方和下方添加文本

tag-icon • tag-icon tikz-pgf labels tikz-node
在节点上方和下方添加文本

我有下图

\documentclass[border=0.9cm]{standalone}
 
% More defined colors
\usepackage[dvipsnames]{xcolor}
 \usepackage{amsmath}
% Required package
\usepackage{tikz}
\usetikzlibrary{positioning}
\definecolor{gr}{RGB}{221, 220, 221}
 
\begin{document}
 
\begin{tikzpicture}
\node [draw=gr,
    fill=gr,
    rounded corners,
    minimum width=3cm,
    minimum height=1.2cm,
]  (controller) {$equations$};
 
\node [draw=gr,
    fill=gr, 
    rounded corners,
    minimum width=2cm, 
    minimum height=1.2cm, 
    below right= 1cm and -4cm of controller
]  (sensor) {\begin{tabular}{c} Dynamical \\ system \end{tabular}};
        
\draw[-stealth] (controller.east) -- +(0.6,0) |- node[pos=0.755, above]{$\text{control input}$} (sensor.east);
\draw[-stealth] (sensor.west) -- +(-1.8,0) |- node[pos=0.5,left]{$x(k)$} (controller.west);
    
\end{tikzpicture}
 
\end{document}

我如何添加类似这里的文字（用红色标记）

在此处输入图片描述

答案1

尝试

\draw[-stealth] (controller.east) -- +(0.6,0) |- node[pos=0.755, above]{control input} node[pos=0.755, below]{another text here}  (sensor.east);
\draw[-stealth] (sensor.west) -- node[above]{Text also here} +(-1.8,0) |- node[pos=0.5,left]{$x(k)$} (controller.west);

您可以node连续执行多个命令。

顺便说一句，您可以$\text{some words}$用替换some words。

在此处输入图片描述

\documentclass{standalone}
\usepackage[dvipsnames]{xcolor}
\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{positioning}
\definecolor{gr}{RGB}{221, 220, 221}
\begin{document}
\begin{tikzpicture}
\node [draw=gr,
    fill=gr,
    rounded corners,
    minimum width=3cm,
    minimum height=1.2cm,
]  (controller) {$equations$};
 
\node [draw=gr,
    fill=gr, 
    rounded corners,
    minimum width=2cm, 
    minimum height=1.2cm, 
    below right= 1cm and -4cm of controller,
    align=center
]  (sensor) {Dynamical \\ system};
        
\draw[-stealth]
  (controller.east)
  -- +(0.6,0) node[pos=0.5,above]{X}
  |- node[pos=0.755, above]{control input}
     node[pos=0.755, below]{another text}
  (sensor.east);
\draw[-stealth]
  (sensor.west)
  -- node[above]{also here} +(-1.8,0)
  |- node[pos=0.5,left]{$x(k)$}
  (controller.west);  
\end{tikzpicture}
\end{document}

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