Creating and exporting an FMU

The FMI specifications define two types of FMU:

• FMU for Model Exchange — a standardized container for compiled software that evaluates a system-simulation model's differential equations. It is meant to be interfaced with an FMI-for-Model-Exchange-compliant simulator that provides at least the numerical solver needed to perform the transient simulation.
• Slave FMU for Co-simulation — a standardized container for a simulator (system-simulation model + math libraries + numerical solver). It is meant to be interfaced with a master FMI-for-Co-simulation simulator that provides at least the co-simulation stepping scheme needed to operate the slave.

Simcenter Amesim can create both FMU types using a single tool: the FMU export assistant.

Sub-topics in this chapter

• Getting started: exporting a simple model with no input or output
• The Export Tool in detail
• Interface block creation
• Open-loop simulations for basic model checks
• The FMU Export Assistant
• Directional derivatives
• Numerical solver settings relevant to co-simulation
• Generating FMU documentation
• Installation-free FMUs (standard case)
• Runtime licenses (FMU execution, standard case)
• License-free and/or standalone FMU (option)
• Simcenter Executable Digital Twin (option)
• Multiple FMUs and multiple instances of the same FMU
• Tool Coupling scenario with result file
• Initialization
• Co-simulation settings in the master simulator
• FMU Export via scripting