Generate linear models in base workspace when triggered
When triggered, this block calls
dlinmod to create a linear model for
the system at the current operating point. No trimming is performed.
The linear model is stored in the base workspace as a structure, along
with information about the operating point at which the snapshot was
taken. Multiple snapshots are appended to form an array of structures.
The block sets the following model parameters to the indicated values:
BufferReuse = 'off'
RTWInlineParameters = 'on'
BlockReductionOpt = 'off'
The name of the structure used to save the snapshots is the
name of the model appended by
structure has the following fields:
The A matrix of the linearization
The B matrix of the linearization
The C matrix of the linearization
The D matrix of the linearization
Names of the model's states
Names of the model's output ports
Names of the model's input ports
A structure that specifies the operating point of the
linearization. The structure specifies the value of the model's states
The sample time of the linearization for a discrete linearization
Use the Timed-Based Linearization block to generate linear models at predetermined times.
You can use state and simulation time logging to extract the
model states at operating points. For example, suppose that you want
to get the states of the vdp example model when the signal
the Trigger-Based Linearization block on a rising edge.
Open the model and drag an instance of this block from the Model-Wide Utilities library and drop the instance into the model.
Connect the block's trigger port to
the signal labeled
Open the model's Model Configuration Parameters dialog box.
Select the Data Import/Export pane.
Check States and Time on the Save to Workspace control panel
Select OK to confirm the selections and close the dialog box.
Simulate the model.
At the end of the simulation, the following variables appear
in the MATLAB® workspace:
Get the index to the first operating point time by entering the following at the MATLAB command line:
ind1 = find(vdp_Trigger_Based_Linearization(1).OperPoint.t==tout);
Get the state vector at this operating point.
x1 = xout(ind1,:);
The trigger port accepts signals of any numeric data type that Simulink® supports.
For more information, see Data Types Supported by Simulink in the Simulink documentation.
Type of event on the trigger input signal that triggers generation of a linear model. See the Trigger type parameter of the Trigger block for an explanation of the various trigger types that you can select.
Specify a sample time to create a discrete-time linearization of the model (see Discrete-Time System Linearization).
Specified in the Sample time parameter