Seth on Simulink

June 13th, 2008

In early April, our physical modeling team released a new add-on for Simulink, SimElectronics. SimElectronics extends Simscape by adding tools for modeling electronics and electromechanical systems.

What is Simscape?

Simscape is a platform for physical modeling. Instead of connecting together blocks that define the equations of your system, Simscape and its add-on tools enable modeling and simulation of multidomain physical systems, such as those with mechanical, hydraulic, and electrical components. The connections between physical modeling elements are not signals, the connections don’t represent data flow. They represent physical connections between things like bodies and joints, or resistors and transistors.

What’s new with SimElectronics?

SimElectronics adds components for modeling electronics and electromechanical systems.

• Includes semiconductors, actuators, sensors, and IC elements
• Includes the ability to simulate in PWM or Averaged mode to balance the level of fidelity vs simulation speed
• Import SPICE net lists containing Transistors, JFET, diode, sources, and passive SPICE components

I think it helps to look at the web demos to understand what you might do with SimElectronics. These demos have great SVG published models that you can explore. Start with this plant model of a DC motor connected to a worm gear as part of a linear actuator. This plant model might be your first step in developing a controller for such a system.

(click for a WebView of the model)

Next, you might add an H-Bridge, a current controller, and a speed controller for the linear actuator. Take a look at this plant model with a controller.

(click for a WebView of the model)

This model would show that you have good controllers, but notice the controllers consist of transfer function pre-filters and PI controllers with Simulink integrator blocks. These controllers can now be modeled using SimElectronics components. The final step in the series would be a validation model with the op-amps, resistors and capacitors that would implement the controller you designed.

(click for a WebView of the model)

This model uses a 10 kHz PWM waveform to achieve a high fidelity simulation. Download a trial of SimElectronics if you think this type of workflow would be useful to you.

Video of SimElectronics in action

Steve Miller has made a video demo of Modeling an Electromechanical System. I recommend watching this to get the SimElectronics experience.

Now it’s your turn

Are you using the physical modeling tools? Have you tried SimElectronics? Post a comment here and tell us about it.

19:23 UTC | Posted in Modeling, What's new? | Permalink |

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6 Responses to “Announcing SimElectronics!”

1. mohsen replied on July 18th, 2008 at 08:17 UTC :
   

   dear sir, tnx for ur very good helping,
   I wanna exactly now from which release this new toolbox(simelectrinics) is add on and how I can install it on previous versions
   thank u in advance

2. Seth replied on July 19th, 2008 at 09:10 UTC :
   

   @mohsen - SimElectronics was released as part of R2008a+, and is only compatible with that release.

3. Bilal Majeed replied on August 25th, 2008 at 23:57 UTC :
   

   Dear Sir,
   Thanks for your release.That was realy helpfull. Sir i have a little problem in connecting my simulink block to my GUI. In actual my requirement is to get data from my simulink in real time and plot it in real time on my GUI AXES. like on scope of simulink block. Please help me out.
   Thanks in advance

   Regards,
   Bilal

4. ljp replied on September 29th, 2008 at 11:27 UTC :
   

   very good

5. fccu replied on January 12th, 2009 at 09:21 UTC :
   

   Great post! Thanks for sharing!! :D

6. arun kumar replied on November 6th, 2009 at 14:19 UTC :
   

   dear seth
   i have been involved in developing and simulating asynchronous systems for my VLSI lab.
   in asynchronous systems i have to redefine the basic gates and,or,xor etc.

   so i had build my own customized basic blocks which i did using the existing blocks.

   everytime i need to change the size say 2 bit gate to 3 bit gate i have to go to the block replicate the existing logic.

   Is there a way build a system which takes the bit size as input and then generates the required block … just like we vary the size of ordinary and gate.

   basically i want to build a asynchronous library of my own. Where do i start ?

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