Main Content

Import FMUs

Use theFMUblock to import Functional Mockup Units (FMUs) into Simulink®.

The FMU block automatically selects the FMU mode based on the existing FMU you want to import:

  • Co-Simulation— Integrate FMUs that implement an FMI Co-Simulation interface. These FMUs can contain local solvers used for tool coupling.

  • Model Exchange— Integrate FMUs that implement an FMI model exchange interface. These FMUs do not contain local solvers. Instead, these FMUs inherit solvers from Simulink.

This block supports FMI versions 1.0 and 2.0. For FMI version 2.0, if your FMU contains both Co-Simulation and Model Exchange elements, the block detects this state and prompts you to select the operation mode for the block.

You can use your FMU block as you do other Simulink blocks. The FMU block supports normal, rapid accelerator, and accelerator modes. Rapid accelerator mode is unsupported for FMU blocks with FMU logging.

This topic assumes that you provide a.fmufile.

FMU XML File Directives

The default parameter values derive from the corresponding parameterstartvalue defined in the FMUModelDescription.xmlfile. A block parameter value overwrites the initial value of the corresponding parameter defined in the FMU binary implementation.

Simulink interprets these FMU tags accordingly.

FMU Tag 金宝app

ScalarVariablehas attributes set as follows:

  • causality="none"orcausality="internal"

  • variability="parameter"

  • startvalue is defined

InterpretsScalarVariableelement as block parameter

Real

Interprets block parameter as edit field

Integer

Interprets block parameter as edit field

Boolean

Interprets block parameter as check box

Enumeration

Interprets block parameter as drop-down list

String

Interprets as UTF-8 encoded string

The FMU block supports the following encoding formats for the model description XML file:

  • ISO-8859–1

  • UTF-8

  • UTF-16

Additional Support and Limitations

Capability FMI Version 2.0 Support FMI Version 1.0 Support

节省SimState基工作区

Fast restart

Simulation Stepper

Solver Jacobian

Linearize models

Declare parameter as tunable and tune it during simulation

For Each subsystem blocks

Parameters of type string

Rapid accelerator mode

Software-in-the-loop (SIL) and processor-in-the-loop (PIL) modes

Code generation

Supports code generation targetslrealtime.tlcin Co-Simulation mode. Does not supportFMUblocks for Model Exchange mode. For more information, seeApply Functional Mockup Units by Using Simulink Real-Time(Simulink Real-Time).

FMU export

Protected model export

(generated SLXP file does not support rapid accelerator or deployed simulation in the top-level model)

(generated SLXP file does not support rapid accelerator or deployed simulation in the top-level model)

Model coverage

Simulink Design Verifier™

Model reference in accelerator mode

Simulink supports stepping back and forth, tuning parameters in between, and saving states for the FMU Import block as long as the FMU itself supports these features. FMU flags that it supports these features by settingcanGetAndSetFMUstateandcanSerializeFMUstatefields in its model description XML totrue.

FMU Import Examples

Example Description

Importing a Co-Simulation FMU into Simulink

This model shows how to use the FMU block to load an FMU file that supports Co-Simulation mode.

Importing a Model Exchange FMU into Simulink

This model shows how to use theFMUblock to load an FMU file that supports Model Exchange mode.

Simplify Interface for Structured Data with FMU Import Block

This model shows how to use bus signals and structure parameters in an FMU block that supports Model Exchange mode.

See Also

Related Topics

External Websites

Simulink Documentation

金宝app

Model-Based Design for Embedded Control Systems

Model-Based Design for Embedded Control Systems

Download white paper