MATLAB: How to access simulation information with the command SIM in Simulink 7.3 (R2009a)

informationsimsimulink

I would like to start my simulation with the command SIM in the MATLAB command window. Now I would like to obtain information during runtime like the actual simulation time. Is this possible when using the SIM command?

Best Answer

The ability to obtain information about the current simulation when using SIM is not available in Simulink 7.3 (R2009a).

This is because the SIM command blocks the MATLAB command window and other commands cannot be executed until the SIM command has completed execution. The advantage is that you can use this for MATLAB-script automation of data processing.

To work around this issue you can use the SET_PARAM command to start/stop your simulation:

set_param(<modelname>,'SimulationCommand','start')

More information can be found at:

 <http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/slref/f23-7515.html>

This does not block the MATLAB command window and you can retrieve all the needed information of the current simulation.

MATLAB-file automation: Here you need to check the state of the simulation because the command line is not blocked.

Related Solutions

MATLAB: Am I unable to access the “RuntimeObject” parameter of the Mux and Demux blocks during runtime in Simulink 6.2 (R14SP2)

This change has been incorporated into the documentation in Release 14 Service Pack 3 (R14SP3). For previous releases, read below for any additional information:

This is an error in the documentation for Simulink 6.2 (R14SP2) in the "Accessing Block Data During Simulation" section. Every block except virtual blocks or blocks that are virtualized (reduced) during the compile process has a RuntimeObject parameter.

To find a list of virtual blocks, please take a look at the documentation accesible by running the following command in your MATLAB 7.0.4(R14SP2) command window:

web([docroot,'/toolbox/simulink/ug/working_with_blocks2.html'])

MATLAB: How to control a simulation running on a machine remotely from another machine in MATLAB 7.7 (R2009a)

This can be achieved using a MATLAB Automation server from a client application such as Microsoft Visual Basic.

For example the following sequence of steps shows how to run, pause and stop a Simulink application on a target machine which has MATLAB installed, from a client machine (such as a monitor machine) through a Visual Basic application:

1. On the machine that has MATLAB installed (say, the target machine), make these setup changes:

a. Start the DCOM Configuration utility by selecting "Start->Control Panels->Administrative

Tools->Component Services".

b. Select "Component Services->Computers->My Computer->DCOM Config".

c. Right-click the appropriate "Matlab.Application" line and select "Properties". For MATLAB 7.0 (R14) to MATLAB 7.3 (R2006b), select "Matlab.Application (Version 7.0)". In your case, if you are using MATLAB 7.8 (R2009a), choose the application with version 7.3

d. Click the "Identity" tab and select "Interactive User". Click "OK".

2. Now open a VB editor. For example, you can open the VB editor that is available with excel by opening excel and typing (Alt + F11).

Within the editor, use the CREATEOBJECT command to create an instance of MATLAB in the target machine using the code snippet below:

Sub test()
Dim MatLab As Object
Dim Result As String
Set MatLab = CreateObject("Matlab.Application", <ipaddress of target machine>")
MatLab.Execute ("open_system('vdp')")
Result = MatLab.Execute("set_param('vdp', 'SimulationCommand', 'start')")
MatLab.Execute ("set_param('vdp', 'SimulationCommand', 'stop')")
End Sub

Here, "ipaddress of target machine" is the ipaddress of the machine where MATLAB is to be remotely opened. To obtain this address, type IPCONFIG in the DOS prompt of the target machine.

The above code sample opens MATLAB on a remote machine, opens the model VDP, and starts and stops it. Note that you have to use the MatLab.Execute command to execute MATLAB commands

For more information about running simulations programatically, visit the link below:

 <http://www.mathworks.com/help/releases/R2009a/toolbox/simulink/index.html?/help/releases/R2009a/toolbox/simulink/ug/f11-61832.html>

You can perform most of the GUI operations of Simulink(such as tuning parameters, etc) from the command line using the SET_PARAM command. More information can be obtained in the MATLAB Help documentation at the link below:

 <http://www.mathworks.com/help/releases/R2009a/toolbox/simulink/index.html?/help//releases/R2009a/toolbox/simulink/slref/set_param.html>

To add blocks and create libraries use the commands ADD_BLOCK, and ADD_LINE. For more information about these commands, follow the links below:

 <http://www.mathworks.com/help/releases/R2009a/toolbox/simulink/index.html?/help/releases/R2009a/toolbox/simulink/slref/add_block.html>
 <http://www.mathworks.com/help/releases/R2009a/toolbox/simulink/index.html?/help/releases/R2009a/toolbox/simulink/slref/add_line.html>

Best Answer

Related Solutions

MATLAB: Am I unable to access the “RuntimeObject” parameter of the Mux and Demux blocks during runtime in Simulink 6.2 (R14SP2)

MATLAB: How to control a simulation running on a machine remotely from another machine in MATLAB 7.7 (R2009a)

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