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Mod

eling

Overview

20-sim is a modeling and simulation program that

allows you to enter models graphically, similar to

drawing an engineering scheme. With these

models you can simulate the behavior of dynamic

systems, such as electric, mechanical, or

hydraulic systems, including computer control

loops.

www.20sim.com

Library

20-sim contains model libraries with domain-

oriented components, block diagram and bond

graph elements. You can compose your model bydragging library components into the 20-sim

Editor.

Benefits

With 20-sim you can improve your system with

respect to speed, vibrations, robustness etc.

Using code generation, you can export C-code to

run on hardware boards. Rapid Prototyping tools

like 20-sim 4C, allow you to start and stop the

code and measure the results.

Electric

Hydraulic

Thermal

Various voltage and current sources.

Inductors, resistors and capacitors.

Diodes, op-amps and rectifiers.

Motors and piezo actuators.

Orifices and laminar resistances.

Cylinders, accumulators and tanks.

Pumps, motors and valves.

Flow, power and pressure sensors.

Heatcapacity and heat flow.

Convection and radiation elements.

Heat generators.

Mechanical

Block Diagrams

BondGraph

Inertia's, springsand dampers.

Bearings, backlash and clutch models.

Belts, spindles, gears and differentials.

AC / DC motors.

Linear and non-linear blocks.

Sources& sinks.

Filters and controllers.

Transfer functions.

Storageelements.

Transformers and dissipators.

Sources& sinks.

Thepowerinmodeling20-sim

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Simu

lation

www.20sim.com

OpenLibrary

BondGraphs

Exportto Matlab

Simulationalgorithms

Discrete-time

TimeDomain Toolbox

All standard bond graph elements are available in

20-sim. Causality is automatically assigned.

Algebraic loops and derivative causalities are

removed using symbolic manipulation of the

model equations.

The 20-sim library models are open. You can

inspect the underlying equations and change

them. The equations are written in SIDOPS+.

This is a language which uses a standard

mathematical notation and is very easy to learn.

20-sim supports a wide variety of dynamic

systems, including linear, non-linear, discrete-

time, continuous-time and hybrid systems.

Every 20-sim model can be exported to Matlab /

Simulink as an m-file or S-function. 20-sim linear

system models can be exported as a transferfunction or state space model.

20-sim contains powerful simulation algorithms

for solving ordinary differential equations (ODE)

and differential algebraic equations (DAE). 20-

sim has a variety of numerical integration

methods: fixed and variable step size, one-step,

multi-step and multi-order methods.

20-sim supports continuous and discrete time

modeling. Discrete time loops are automatically

detected and assigned a separate sample rate.

The Time Domain Toolbox allows you to use six

powerful model analysis methods with a few

mouse clicks. Parameter sweeps, Optimization

and Curve Fitting will help to improve model

performance. Sensitivity Analysis, Monte Carlo

Analysis and Variation Analysis, will help you to

check the validity bounds of virtualprototypes.

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An

a

lysis

www.20sim.com

FrequencyDomain Toolbox

Control Toolbox

The 20-sim Frequency Domain Toolbox consists

of the Linear System Editor, FFT analysis tools

and model linearization functionality.

The Linear System Editor is a specialized tool for

the design of linear systems. The editor supports

continuous-time and discrete-time SISO

systems. The linear systems can be inspected

and edited in ABCD state space, transfer

function, zero-pole-gain and eigen frequency

representation. Any 20-sim model can be

linearized and shown in the linear system editor.

Fast Fourier Transforms can be applied to any

time-domain plot in 20-sim. Both simulation

results and measurement data can be handled

and displayed as bode plots.

The Control Toolbox consists of the controllerdesign editor, a filter editor and a neural network

editor. The controller design editor allows you to

design a feedback system with a linear plant,

controller and pre-filter. With the filter editor you

can create your own linear filters according to

your specifications

The 3D Mechanics Editor is an advanced editor

for creating 3D dynamic models. The 3D models

can easily be assembled by dragging and

dropping bodies, joints and other objects in a 3Dworkspace. The representation of objects (e.g.

s ha pe , c ol or o r s iz e) c an b e c ha ng ed

independently from their properties (e.g. mass,

inertia or orientation). Bodies are interconnected

by joints. Next to bodies and joints, forces and

sensorscan also be applied in the editor.

.

3D MechanicsToolbox

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