MATLAB: How to access the bus signals created with bus creater inside the matlab function block and pass bus as output from matlab function block

access bus in matlab fuctionbusmatlab function

Suppose I have created the bus of 5 signals with the help of bus creater block given the bus as input to matlab function block. I want to access individual signal from bus inside the matlab function block to do some manipulation with the signals and again pass the manipulated signal collectively as bus from matlab function block as a output.

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See the attached model. MATLAB Function block takes a bus object input and outputs a bus object output. The ingoing signals are multiplied by 2 and outputted. Please see inside of MATLAB Function and File->Model Properties->Model Properties->Callbacks->PreLoadFcn for what I did exactly. The basic thing I did is to form a Simulink.Bus element and construct its elements by Simulink.BusElement. You will see these in PreLoadFcn. Then, inside the MATLAB Function, the key is to form a struct and assign to the output of the function. Also, if you go to Model Explorer->bus_creator_matlab_func->busInOut, you will see that it is necessary to define output y's DataType as Bus. Hope this helps.

Related Solutions

MATLAB: Is the output of the Bus Selector block with the ‘Muxed Output’ option checked a bus or a mux signal (R14SP2)

The intended use of the 'Muxed Output' option is to create buses. This option is mislabeled. With that in mind, signals leaving this block should only feed bus capable blocks.

This option can cause difficulty due to the fact that when an outgoing signal is the same datatype it can be treated as a mux signal. For instance, as an input to a Gain block.

You should treat the output of a Bus Selector block with the mislabeled 'muxed output' option checked as a bus.

If you want a muxed signal, use a Bus Selector block to select the desired signals, which must have the same datatype and be scalars or vectors and connect those signals to a Mux block.

Please refer to the Related Solution for more information.

The option lets you prune one bus to produce another smaller bus.

MATLAB: Rename BUS

Hi,

if you create a sample BUS with the bus editor you can export the BUS in the Model Explorer (Ctrl + H) of your Simulink Model (Base Workspace). It will generate an .m-file where you can set the bus names and run on model startup:

% -------------------------------------------------------------------

%  MATLAB file generated by Simulink.saveVars 
% -------------------------------------------------------------------
FA = Simulink.Bus;
FA.Description = '';
FA.DataScope = 'Auto';
FA.HeaderFile = '';
saveVarsTmp{1} = Simulink.BusElement;
saveVarsTmp{1}.Name = 'cog';
saveVarsTmp{1}.DataType = 'double';
saveVarsTmp{1}.Complexity = 'real';
saveVarsTmp{1}.Dimensions = 1;
saveVarsTmp{1}.DimensionsMode = 'Fixed';
saveVarsTmp{1}.SamplingMode = 'Sample based';
saveVarsTmp{1}.SampleTime = -1;
saveVarsTmp{1}(2, 1) = Simulink.BusElement;
saveVarsTmp{1}(2, 1).Name = 'mass';
saveVarsTmp{1}(2, 1).DataType = 'double';
saveVarsTmp{1}(2, 1).Complexity = 'real';
saveVarsTmp{1}(2, 1).Dimensions = 1;
saveVarsTmp{1}(2, 1).DimensionsMode = 'Fixed';
saveVarsTmp{1}(2, 1).SamplingMode = 'Sample based';
saveVarsTmp{1}(2, 1).SampleTime = -1;
FA.Elements = saveVarsTmp{1};
clear saveVarsTmp;

Regards, Andreas

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Related Solutions

MATLAB: Is the output of the Bus Selector block with the ‘Muxed Output’ option checked a bus or a mux signal (R14SP2)

MATLAB: Rename BUS

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