How to initialize a Unit Delay block with a Bus signal from a Data Dictionary in the Model Workspace in R2021a?

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MathWorks Support Team 2021-9-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1459994-how-to-initialize-a-unit-delay-block-with-a-bus-signal-from-a-data-dictionary-in-the-model-workspace

回答： MathWorks Support Team 2021-9-24

采纳的回答： MathWorks Support Team

My model contains a Bus signal feeding a Unit Delay block which should be initialized:

So that Bus elements a and b have different initial conditions.

I saw that one can use the following workflows:

https://www.mathworks.com/help/simulink/ug/specifying-initial-conditions-for-bus-signals.html#bsff88y

But how can I create the MATLAB struct inside the Model Workspace which should get Bus type data from a Data Dictionary (DD). Besides this I also want to use variables/values from the Base Workspace in the MATLAB struct.

How can I do this?

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Answer 1

MathWorks Support Team 2021-9-24

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1459994-how-to-initialize-a-unit-delay-block-with-a-bus-signal-from-a-data-dictionary-in-the-model-workspace#answer_794209

The attached example contains the following information which solves the issue:

The following MATLAB code is used to create the struct:

initBUS = Simulink.Parameter;
myDictionaryObj = Simulink.data.dictionary.open('testDD.sldd');
initBUS.DataType = 'Bus: myBus';
initBUS.Value = Simulink.Bus.createMATLABStruct('myBus',[],1,myDictionaryObj); %initializes the struct using the 'scope' property to search for the type in a data dictionary
initBUS.Value.a = evalin('base','aVar'); %gets data from Base Workspace
initBUS.Value.b = evalin('base','bVar'); %gets data from Base Workspace
clear myDictionaryObj