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使用 Tikz 包绘制框图

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使用 Tikz 包绘制框图

请问如何在 Latex 中绘制下图？我从一本日记中复制了该图。我目前正在使用 Tikz 包。谢谢你的帮助。

更新：

我的代码如下所示。

\begin{tikzpicture}
 
% Zero order block 
\node[draw,
    minimum width=2cm,
    minimum height=1.2cm,
] (ZOH) at (0,0){$Hold (H)$};

% High altitude balloon block
\node [draw, 
    minimum width=2cm, 
    minimum height=1.2cm, 
    above right= 0.5cm and 1cm of ZOH
]  (plant) {Plant (G) $\dot{x} = f(x(t), u(t), w(t))$};

% Sampler
\node [draw, 
    minimum width=2cm, 
    minimum height=1.2cm, 
    below right= 0.5cm and 1cm of plant
]  (sampler) {Sampler $[k]$};

% Extremum seeking controller
\node [draw, 
    minimum width=2cm, 
    minimum height=1.2cm, 
    below right= 0.5cm and 1cm of ZOH] 
     (ESC) {Controller (K) ;
          $\hat{u}_j = K(\hat{x}_j)$ };

% Arrows with text label
\draw[-stealth] (ZOH.north) |- (plant.west)
    node[near end,above]{$u(t)$};

\draw[-stealth] (plant.east) -| (sampler.north)
    node[near start,above]{$x(t)$}; 

\draw[-stealth] (sampler.south) |- (ESC.east)
    node[near end,below]{$J[k]$};   

\draw[-stealth] (ESC.west) -| (ZOH.south)
    node[near start,below]{$\hat{u}_j$};        

\end{tikzpicture}

在此处输入图片描述

答案1

希望这可以帮助：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{positioning,arrows.meta}

\begin{document}

\begin{tikzpicture}[>=stealth]
 
% Zero order block 
\node[draw=black!50,ultra thick,
minimum width=2.2cm,
minimum height=1cm,fill=cyan!30] (ZOH) at (0,0){Hold $(H)$};

% High altitude balloon block
\node [draw=black!50, 
    minimum width=2cm, 
    minimum height=1.5cm, 
    above right= 0.5cm and 1cm of ZOH,
    align=center, ultra thick,fill=cyan!30
]  (plant) {Plant (G)\\$\dot{x}(t) = f(x(t), u(t), w(t))$};

% Sampler
\node [draw=black!50, 
    minimum width=2cm, 
    minimum height=1.2cm, 
    below right= 0.5cm and 1cm of plant, ultra thick,fill=cyan!30,
    align=center
]  (sampler) {Sampler $(S)$\\sampling instants, $\{r_j\}$};

% Extremum seeking controller
\node [draw=black!50, 
    minimum width=3cm, 
    minimum height=1.5cm, ultra thick, fill=cyan!30,
    below right= 0.5cm and 1.6cm of ZOH,
    align=center] 
     (ESC) {Controller (K)\\
    $\hat{u}_j = K(\hat{x}_j)$ };

% Arrows with text label
\draw[->,ultra thick] (ZOH.north) |- (1.9,1.7);
\draw (-0.5,1.7) node {$u(t)$};

\draw[->,ultra thick] (plant.east) -| (sampler.north)
    node[near start,above]{$x(t)$}; 

\draw[->,ultra thick] (sampler.south) |- (ESC.east)
    node[near end,below right]{$\hat{x}_j=x(r_j)$};   

\draw[->,ultra thick] (ESC.west) -| (ZOH.south)
    node[near end,left]{$\hat{u}_j$};   
\draw[->, ultra thick] (0,2.2) node[anchor=east] {$w(t)$} -- (1.9,2.2);

\end{tikzpicture}

\end{document}

图像

节点文本中的换行符的关键是使用align=center。然后我只是改变了线条和箭头的粗细，移动了一些节点，改变了颜色，然后当然，在左上角附近添加了额外的箭头。

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