How to use nonvirtual bus as Stateflow Output-Signal?

Question

Leonard La Pietra 2022-1-26

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https://ww2.mathworks.cn/matlabcentral/answers/1636695-how-to-use-nonvirtual-bus-as-stateflow-output-signal

回答： ag 2023-12-1

Hello, for my Simulink-model of a flight-guidance controller for a quadrotor, I want to use a Stateflow Chart to decide whether the quadrotor is taking off, following a trajectory or hovering etc.

For this Stateflow, I want to use a nonvirtual bus-signal as output-signal. I created a Simulink Bus Object in base workspace and specified it and I used bus-creator to include the signals and set its output to nonvirtual, but when I connect the bus to the output of the Stateflow Chart and update my model, it get´s me this error:

"Unable to assign structure value to non-structure output 'ControlCommands' of chart 'Guidance_Model/Chart'."

"ControlCommands" is the output of the Stateflow Chart.

Hopefully somebody can explain to me, what I´m missing here, thanks!

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Answer 1

ag 2023-12-1

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Hi Leonard,

I understand that you are having trouble using the output from a bus, as input to the Stateflow chart.

To do so, you can access bus singals by defining a Stateflow structure as described in the below steps,

Define the structure data type and create a Simulink bus object in the base workspace
Add a data object to the chart
Set the Scope property for the structure.

For more details on how to define and use Stateflow structures please refer to the following documentation, https://www.mathworks.com/help/stateflow/ug/about-stateflow-structures.html#mw_f5c437a0-9cd0-4980-a865-e7415eb14b0c:~:text=and%20lower_saturation_limit.-,Define%20Stateflow%20Structures,-To%20define%20the

Hope this helps!

Best Regards,

Aryan Gupta