How to speed up the simulation?
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I developed a model using SimEvents. It contains several constant blocks and Embedded Matlab functions that collect parameter values from Matlab workspace. Parameters vary with time.
During the simulation, some calculations based on the output has to be done and depending on results, it chooses rather to continue or stop the simulation.
I managed it using Assertion block to pause the simulation. After that, parameters values are being changed from Matlab and updated using:
set_param(bdroot,'SimulationCommand','update')
And continued using:
set_param(bdroot,'SimulationCommand','continue')
The model works just fine in this way. But the problem is because it is such a big time consumer. Since it represents a part of an optimization algorithm it has to be run numerous number of times, so running time is unacceptable. I understand that updating parameters takes the most of the time, but that was the only way i knew.
Is there some other way how to manage this thing working? How could I speed up running time of the simulation?
It should be noted that pausing times are defined before running the simulation. Constant blocks are scalars and values for Embedded Matlab functions are matrices (constant size).
The second issue is can I run the model without having it opened? I assume, in that case i should use something different than bdroot. Any ideas?
I would highly appreciate any suggestions.
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Kaustubha Govind
il 25 Lug 2011
Regarding the second question, you only need to load your model using load_system - this will load it into memory, but not open it.
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Fangjun Jiang
il 24 Lug 2011
Can you also implement the matrices through Constant block? While a simulation is running, you can double click the Constant block, the simulation will pause, you can then change the value of the constant block. Once you click Okay, the simulation will resume using the new value. Of course, you can do this through setting the 'SimulationCommand' like you did. All I am trying to say is that you may not need to run set_param(bdroot,'SimulationCommand','update') which will save you time.
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Kaustubha Govind
il 27 Lug 2011
You can use get_param('sys', 'SimulationStatus') to query the status of your simulation. See http://www.mathworks.com/help/toolbox/simulink/ug/f11-61851.html for more information. You could use a while loop to wait until the status becomes 'paused'.
Kushagra
il 16 Set 2013
For speeding up simulation, you can use accelerator and rapid accelerator mode. For details, refer to below webinar: https://www.mathworks.in/company/events/webinars/webinarconf.html?id=54186&language=en&confirmation_page&wfsid=4859788
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