fastRestart

R2026b

(Not recommended) Simulate Simulink model in fast restart mode using simulation scenario

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fastRestart is not recommended. Enable fast restart using the setup function instead. For more information, see Compatibility Considerations.

Syntax

Simulator_out = fastRestart(Simulator,EnablefastRestart)

Description

Simulator_out = fastRestart(Simulator,EnablefastRestart) configures a Simulink® model and simulation scenario specified in sdo.SimulationTest object, Simulator, for simulation in fast restart mode. Fast restart configures the model to compile once when first simulated. Subsequent model simulations reuse the compiled data, speeding up subsequent simulation runs.

Input Arguments

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Simulation scenario for Simulink model, specified as an sdo.SimulationTest object. A simulation scenario specifies input signals, model parameter and initial state values, and signals to log for a model.

If you want to linearize the model, for example if you have frequency-domain design requirements, specify the linearization logging information in the SystemLoggingfInfo property of Simulator.

Configuration of model and simulation scenario for fast restart, specified as one of the following values:

  • 'on' — Initializes a Simulink model to simulate in the fast restart mode using simulation scenario specified in Simulator object. Fast restart configures the model to compile once when first simulated. Subsequent model simulations reuse the compiled data, speeding up subsequent simulation runs.

    Once you have initialized a model in fast restart, you can change only tunable properties of the model.

  • 'off' — Turns off the fast restart mode. Use this option to change nontunable properties of your model.

Output Arguments

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Simulation scenario configured for fast restart, returned as a sdo.SimulationTest object.

Examples

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This example shows how to simulate a model using fast restart mode.

Open the model.

open_system('sdoHydraulicCylinder')

Create a simulation scenario for the model.

simulator = sdo.SimulationTest('sdoHydraulicCylinder');

Configure the model and simulator for fast restart.

simulator = fastRestart(simulator,'on');

Simulate the model.

simulator = sim(simulator);

The first simulation in fast restart mode requires the model to compile. Subsequent simulations execute in fast restart mode and reuse the compiled data.

Adjust tunable model parameters.

Ac = sdo.getParameterFromModel('sdoHydraulicCylinder','Ac');
Ac.Value = 0.5;
simulator.Parameters = Ac;

Simulate the model again.

simulator = sim(simulator);

The model simulates in fast restart mode.

Turn off fast restart mode.

simulator = fastRestart(simulator,'off');

Tips

  • To optimize, evaluate, or estimate a Simulink model, first create a simulator configured for fast restart (Simulator_out). Then use Simulator_out as an input to your cost function. If you create a simulator in the cost function, you cannot use fast restart mode.

  • When you enable fast restart, you can change only tunable properties of the model.

  • To linearize the model, specify the linearization logging information in the SystemLoggingfInfo property of Simulator before configuring the model for fast restart.

Version History

Introduced in R2015b

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See Also

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