How do I extract a state space model from a Simulink subsystem?

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PaulS
PaulS 2015-4-30
编辑： Sainath Varikuti 2015-5-1
Hi,
in order to determine parameters for my control design I need to extract a state space model from a Simulink model. Using the linmod command on a Simulink model works fine but I want to implement the model as a subsystem into another model. sys=linmod('model/subs') is not working and sys=linearize('model/subs') returns the error "SubSystem block does not have a parameter named 'SimulationStatus'".
Any suggestions?
thanks in advance
Paul

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回答（1 个）

Sainath Varikuti
Sainath Varikuti 2015-5-1
编辑：Sainath Varikuti 2015-5-1
'linmod' works for Root level models only and not for the subsystems. The input and output points for the linearization are those corresponding to Inports and Outports blocks at the root level of the model. One workaround would be to extract the model in the subsystem to a top-level model and then perform linearization using 'linmod'.
Alternatively you can use 'linearize' function in the Simulink Control Design Toolbox to linearize model subsystems.

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