Block Diagrams

Block diagrams allow you to graphically represent the mathematical relationships between signals in a system. They are especially suited to model control systems. In 20-sim a large library of block diagram elements is available. The elements are displayed in the Editor by icons. You can create block diagram models by dragging the elements to the Graphical Editor and making the proper connections between the elements.

Library

20-sim has a large library of block diagram elements such as linear, non-linear, discrete and source elements. In 20-sim you can create custom made block diagram elements and add them to the existing libraries or combine them in newly defined libraries.

From the Library Browser (left) you can drag and drop elements into the Graphical Editor (right).

Signals

The foundation of block diagram elements is the use of input and output signals. 20-sim allows you to create user defined block diagram elements with an arbitrary number of input and output signals. Signal sizes can be 1 (default) or larger.

Algebraic Loops and Differential Causality

Algebraic loops and differential causalities are traced automatically. If possible, 20-sim will rewrite the equations symbolically to remove algebraic loops and differential causalities.

Custom Made Models

In 20-sim you can create your own block diagram elements and save them in your own model library.Models can have and arbitrary number of ports, input and output signals. A specialized drawing editor can be used to give the models any kind of representation.