How to access internal variables of Simscape blocks from Simulink using sensors

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MathWorks Support Team el 15 de Dic. de 2022

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https://es.mathworks.com/matlabcentral/answers/1882587-how-to-access-internal-variables-of-simscape-blocks-from-simulink-using-sensors

Editada: MathWorks Support Team el 31 de Mzo. de 2024 a las 20:58

Respuesta aceptada: MathWorks Support Team

I am using the example model 'sscfluids_residential_ground_source_heat_pump.slx' from the MathWorks 'Residential Ground Source Heat Pump' example:

https://www.mathworks.com/help/hydro/ug/residential-ground-source-heat-pump.html

This model plots various variables, one of these being the 'power' variable from the 'Controlled Mass Flow Rate Source (2P) ' block named 'Compressor':

https://www.mathworks.com/help/simscape/ref/flowratesource2p.html

The script for plotting this variable can be found in the second link in the list, 'Plot compressor power & heat transfers in system'. The power variable is obtained in the MATLAB script as follows:

pwrCompressor = simlog.Compressor.power.series.values('kW');

I was wondering how I can access the power of the compressor directly through the Simulink model, without the need for a MATLAB script.

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Answer 1

MathWorks Support Team el 31 de Mzo. de 2024 a las 0:00

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https://es.mathworks.com/matlabcentral/answers/1882587-how-to-access-internal-variables-of-simscape-blocks-from-simulink-using-sensors#answer_1133362

Editada: MathWorks Support Team el 29 de Mzo. de 2024

Many internal variables of Simscape blocks can be accessed through MATLAB code, but there is no direct way to access these variables from Simulink since they are not one of the block's ports. The 'power' variable in the 'Controlled Mass Flow Rate Source (2P)' is one such example. However, we can obtain the variable in Simulink with the help of sensor blocks, as explained below:

To get the value in Simulink instead of MATLAB, we will need to add a few more blocks to calculate the 'power' variable that is generated in the block.

The two types of blocks that will be added are: