Simulink Dataset - Saving and Loading back into Simulink

Question

Horace Lai 2013-4-30

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Hello,

I have a bus in my model that contains many levels of nested buses. I want to log this signal and load this bus's signals in another Simulink model.

I have logged a signal in Simulink by right-clicking it > Signal Properties > Log signal data. This allows me to log the bus signal easily without extracting everything out of it. The ToWorkspace block did not work.

However, now I do not know how to load this new Simulink Dataset variable, named sigsOut by default, in my other Simulink model. It is nowhere near the format needed for the FromWorkspace block. Is there an easy way?

Horace

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Answer 1

Kaustubha Govind 2013-4-30

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It seems like you should be able to import that data back into another model using the Root Inport blocks. Also see Import Structures of timeseries Objects for Buses (apparently the Dataset format actually uses MATLAB timeseries objects).

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Answer 2

Horace Lai 2013-5-2

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I found an example in Simulink that addresses this

http://www.mathworks.se/help/simulink/ug/importing-signal-logging-data.html

However, in order for this to work, the bus signal that is logged must be non-virtual, which means that I will have to create a bus object with the same structure.

My virtual bus is huge, is there a way to do this easily?

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Kaustubha Govind 2013-5-3

Oops, you're right. How about you follow the instructions under 'Making a bus object' on this blog post using Simulink.Bus.createObject? Does that help you generate a bus object?

Horace Lai 2013-5-6

That worked! Thanks. But now I have another issue. I will put it on another post

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Answer 3

Horace Lai 2013-5-6

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I have been able to use the method with logging a bus signal and then loading it back in a model referenced model. However, in the model I am working with, the signal I want to log is a virtual bus, and the model that I want to load it back in is not a model referenced model.

So even though I am able to convert the bus into a non-virtual bus and log it, it would be too much work to redo the model that I want to load it so that it expects a non-virtual bus signal.

Does anyone have any ideas on getting around this? From what I understand of Simulink I do not see a way to convert a non-virtual bus into a virtual bus.