I am trying to implement this Block Diagram:
Forget about the math, I can do it. I just want to implement the diagram. I used the example here; it is nice, but whenever I remove the "measurement" block, the feedback path cannot be obtained unless directly (-180 deg). Also, I am still unable to get more than one box on top of each other.
MWE:
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}
\begin{document}
\tikzstyle{block} = [draw, fill=white, rectangle,
minimum height=3em, minimum width=6em]
\tikzstyle{sum} = [draw, fill=white, circle, node distance=1cm]
\tikzstyle{input} = [coordinate]
\tikzstyle{output} = [coordinate]
\tikzstyle{pinstyle} = [pin edge={to-,thin,black}]
\begin{tikzpicture}[auto, node distance=2cm,>=latex']
\node [input, name=input] {};
\node [sum, right of=input] (sum) {};
\node [block, right of=sum] (controller) {Controller};
\node [block, right of=controller, pin={[pinstyle]above:D},
node distance=3cm] (system) {System};
\draw [->] (controller) -- node[name=u] {$u$} (system);
\node [output, right of=system] (output) {};
\node [block, below of=u] (measurements) {Measurements};
\draw [draw,->] (input) -- node {$r$} (sum);
\draw [->] (sum) -- node {$e$} (controller);
\draw [->] (system) -- node [name=y] {$y$}(output);
\draw [->] (y) |- (measurements);
\draw [->] (measurements) -| node[pos=0.99] {$-$}
node [near end] {$y_m$} (sum);
\end{tikzpicture}
\end{document}
Best Answer
Would this be it?
To draw a block diagram,
(1) First define a style definition for each repeated blocks, input/output, summations, or pins; so that different property of each node is attributed. Use them properly in each node definition mentioned below.
(2) Use
node
command to place each node, it is convenient to allocate each node based on relative position (above, below, right, left =xx cm of < a node >) wherepositioning
tikzlibrary is instrumental. For each node it is convenient to assigned an<internal name>
for later reference, for example, when drawing lines.(3) Use
draw
to complete the line connections, assigning labels along the line vianode[<location>](<internal name>){<external name>}
syntax.Code