Upload an FMU File to Run a Simulation Model

The Functional Mock-up Interface (FMI) standard is an open and tool-independent standard for exchange of models between tools. FMI defines a C interface that is implemented by an executable called a Functional Mock-up Unit (FMU).

FMU is a standard for exporting and importing simulation models. There are two types:

  • Static FMU: doesn’t use state variables and it needs to have the last output calculated to calculate the new value
  • Dynamic FMU: stores the value of the last output calculated in a state variable

FMU files can be generated in many simulation tools, for example using Altair Activate, a block diagram environment for model-based development and multi-domain simulation.

To create a new FMU function:

  1. If not already uploaded, go to Object Storage to upload the FMU file to use in your Function. This can be done in any sub-folder, if desired. All FMU files in your Object Storage will be shown in the select drop-down menu.
  2. Click to add a New Function, name it and choose FMU as template:
    Figure 1.


  3. Choose your FMU file and click Save.
    Figure 2.


  4. To test the FMU function, use the API Inspector to invoke it, as follows:
    Figure 3.


    1. You can also try the following endpoints to retrieve the inputs and the outputs of your function: 
      /spaces/YourSpaceID/functions/YourFunctionName/invoke/inputs
/spaces/YourSpaceID/functions/YourFunctionName/invoke/outputs
      Figure 4.