20sim is a modern modeling and simulation program that runs under Microsoft Windows.
With 20sim you can simulate the behavior of dynamic systems, such as electrical, mechanical and hydraulicsystems or any combination of these.
20sim 4C is a prototyping environment that enables you to connect 20sim models to physical systems. The models can be executed as realtime Ccode onhardware like PC’s or ARM9 based processor boards. Excellent ARM9 demonstrators are the TS7300 Demonstration Kit and the Torsion Bar prototype machine.
Features of 20sim:
20sim
Library
3DMechanics Toolbox
Animation Toolbox
Control Toolbox
Frequency Domain Toolbox
Mechatronics Toolbox
Code Generation Toolbox
Time Domain Toolbox
What’s new in 20sim?
General Features
TheParameter Editor and Variables chooser show the model icons in the model tree.
Any model or plot can be exported to bitmap (png file).
You can enter library paths for library models, ccodegeneration, export to matlab and template files.
A brandnew Document Editor can be used to generate output files (html) for Word Processors and Presentation software.
A Find box has been addedto the button bar.
Simulation buttons have been added to Secondary plot windows.
Library
Signal:
The model derivative has been added.
The model second derivative has been added.
The squarewave generator model has been changed. The internal frequencyevent has been relaxed from 1e15 to 1e14 to prevent the integration method from stopping when running stiff models.
Hydraulics:
Ahydraulic inertia has been added.
The four three way directional valve models now have four spool centers (open, closed, tandem and floating).
The four three way proportional valve models nowhave four spool centers (open, closed, tandem and floating).
The pressure relief valve and pressure reducing valve models have updated icons.
A counter balance valve has been added.
A pilotoperated check valve has been added.
New hydraulic example models have been added:
Cylinder Slip 1.emx
Cylinder Slip 2.emx
Cylinder Cavitation 1.emx
Cylinder Cavitation 2.emx
You can addyour own libraries (Windows folders) to be displayed in the library browser.
New models have been added to the library.
The function linsolve now has optional methods (lu, qr, cholesky,gmres)
Various models have been combined into one model (having multiple implementations)
Frequency Domain Toolbox
In the Linear System Editor you can reduce the order of a system by pole zerocancelation.
In the FFT analysis you can indicate the peaks in an FFT plot.
3D Animation Toolbox
A brandnew Movie Creator will help you to create movies from 3D Animations with few mouseclicks.
The 3D Animation window is equipped with a toolbar.
3D Mechanics Toolbox
3D Mechanics models can be opened from the 20sim Editor.
Acceleration Sensors have been added to thelibrary.
You can add a spring and damping to a joint and define endstops.
Solved Bugs
Initial Equations with global variables are now correctly solved.
Ports of models that are generated withthe 3D Mechanics Editor now have the right domain (now: translation or rotation, was: power).
In windows Vista, bitmaps are correctly shown in a 3D Animation.
Imploding and Exploding modelsthat have an implementation now works fine.
Incorrect initialization of matrices in initial equations solved.
Showing peaks in FFT plots improved.
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