FMI Simulation concepts

danger

The FMI simulation service is currently being tested.

Simulation schema

The schema is used to create simulation blueprints to store and create several simulation instances.

The schema can be create for a single FMU or several FMUs. The schema for a single FMU is:

{
   "id":"schema1",
   "name":"Schema 1",
   "description":"Sample schema",
   "relatedTwins":[
      "Twin1"
   ],
   "fmus":[
        {
            "id": "Controller",
            "inputs": [
                {"id": "u_s"},
                {"id": "u_m"}
            ],
            "outputs": [
                {"id": "y"}
            ]
        }
    ]
}

Schema for several FMUs

The following schema is designed to be used with multiple FMUs:

{
   "id":"schema1",
   "name":"Schema 1",
   "description":"Sample schema",
   "relatedTwins":[
      "Twin1"
   ],
   "fmus":[
        {
            "id": "Controller",
            "inputs": [
                {"id": "u_s"},
                {"id": "u_m"}
            ],
            "outputs": [
                {"id": "y"}
            ]
        },
        {
            "id": "Drivetrain",
            "inputs": [
                {"id": "tau"}
            ],
            "outputs": [
                {"id": "w"}
            ]
        }
    ],
   "schema":[
        {
            "from": {"var": "w_ref"},
            "to": {"id": "controller", "var": "u_s"}
        },
        {
            "from": {"id": "drivetrain", "var": "w"},
            "to": {"id": "controller", "var": "u_m"}
        },
        {
            "from": {"id": "controller", "var": "y"},
            "to": {"id": "drivetrain", "var": "tau"}
        },
        {
            "from": {"id": "drivetrain", "var": "w"},
            "to": {"var": "w"}
        }
    ]
}

This will work properly, although hovering overApparentGreetPropsmay be a little intimidating. You can reduce this boilerplate with theComponentProps utility detailed below.

Simulation running schema

Once you have a schema stored in the system, you can create a simulation instance using that schema:

{
   "id":"Simulation1",
   "name":"Simulation1",
   "schemaId": "schema1",
   "targetConnection":{
      "BROKER_TYPE" : "mqtt",
        "BROKER_IP" : "",
        "BROKER_PORT" : "",
        "BROKER_TOPIC" : "",
        "BROKER_USERNAME" : "",
        "BROKER_PASSWORD" : ""
   },
   "configuration":{
      "SIMULATION_START_TIME":1,
      "SIMULATION_END_TIME":7,
      "SIMULATION_STEP_SIZE":1,
      "SIMULATION_DELAY_WARNING": 1,
      "SIMULATION_LAST_VALUE": true,
      "SIMULATION_TYPESCHEDULE": "one-time"
   },
   "inputs":[],
   "outputs": []
}

This schema is not different for one or several FMUs execution. It only contains information about execution.