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fmi-beginners-tutorial-2023

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FMI tutorial at the 15th International Modelica Conference 2023

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# FMI Beginner's tutorial

This repository contains the agenda and materials for the [FMI Beginner's tutorial](https://www.conftool.com/modelica2023/index.php?page=browseSessions&form_session=5) presented at the [15th International Modelica Conference 2023](https://2023.international.conference.modelica.org/). A recording is available [on YouTube](https://www.youtube.com/watch?v=RlAafdCKCHU).

## Part 1: Introduction to the FMI (40 min)

by [Christian Bertsch](https://github.com/chrbertsch)

[Presentation](part1/Introduction-to-FMI.pdf) covering

- the motivation and history of FMI
- general technical concepts
- tool support
- an outlook on FMI 3.0

## Part 2: Working with FMUs (45 min)

by [Torsten Sommer](https://github.com/t-sommer)

### Prerequisites

- [Python with fmpy[complete]](https://github.com/CATIA-Systems/FMPy#installation)
- [Dymola](https://www.3ds.com/products-services/catia/products/dymola/) (optional)
- [Simulink with Coder](https://mathworks.com/products/simulink-coder.html) and [FMI Kit](https://github.com/CATIA-Systems/FMIKit-Simulink) (optional)

### Schedule

Live demo + Jupyter notebook

- FMU export (from Dymola)
  - open `MODELICA_Demo.Drive` in Dymola and export it as a source code FMU

- FMU export (from Simulink with FMIKit)
  - download and install FMI Kit for Simulink
  - open `Controller.slx` with grtfmi.tlc as a source code FMU

- Validation on Website

- work with FMUs in FMPy
  - set up FMPy (with [mambaforge](https://github.com/conda-forge/miniforge/releases))
  - open GUI, create file association, create desktop shortcut
  - view the model info
  - view the documentation
  - simulate the Drive FMU and plot the result
  - create an input CSV file
  - set the stop time, parameters, output interval (loadInertia1.J = 10)
  - validate the Drive FMU 
  - compile platform binary for the Drive FMU
  - log debug info and FMI calls + short discussion of FMI calling sequence
  - generate a Python notebook from the FMU and run it

- simulate an FMU with fmusim
  - download the Reference FMUs
  - simulate the Drive model with fmusim using the input file and set a parameter
  - plot the result CSV with Excel

## Break (30 min)

## Part 3: Connecting Multiple FMUs (45 min)

by [Maurizio Palmieri](https://github.com/mapalmieri) and [Cláudio Gomes](https://github.com/clagms)

### Prerequisites

1. Optional requisites for following along in the live demo:
   1. Java (recommended version 11)
   2. Install the into-cps application. A full guide can be found in this video: https://youtu.be/HkWh-PubYQo
   3. Have a Google account that you can use for Google Colab.

### Schedule

1. Live demo using the into-cps application (use the [slides](./part3/into-cps_demo.pptx) to follow along):
   1. Setup
      1. Pre-requisites: show that java is installed.
      2. Download intocps application
      3. Download coe from download manager.
      4. Launch COE from UI to show that it works.
   2. Configure a multimodel
      1. Create new project (created project can be found in [part3/example_intocps_app](part3/example_intocps_app))
      2. Locate FMUs to be used.
      3. Move them to new project folder.
      4. Create multi model
   3. Configure a co-simulation
      1. Create cosim configuration.
      2. Explain the different options.
      3. Run it.
      4. Open the results folder
   4. Exploring alternative co-simulation configurations.
      1. Create new cosim config, with an increasing step size, and show instability creeping in.
   5. Summary

2. Using Google Colab, run the Jupyter notebook found in [part3/tutorial_multiple_FMUs](./part3/tutorial_multiple_FMUs/interaction_with_multiple_fmus.ipynb)
   1. Run a co-simulation from the command line
      1. Run a co-simulation with a single FMU
      2. Run a co-simulation with multiple FMUs
   2. Measure Accuracy of the Co-simulation Wrt to Baseline
      1. Co-simulation Scenario with Baseline
      2. Impact of Step Size on the Accuracy

## Part 4: Closing Session (10 min)

by [Cinzia Bernardeschi](https://github.com/cbernardeschi) and [Cláudio Gomes](https://github.com/clagms)

Slides can be downloaded [here](./part4/FMI-overall.pdf).

### Schedule
1. Overview of some FMI Applications
2. Role of FMI in Digital twins.

## Q&A (10 min)

# Photos of the Event

![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0180-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0181-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0182-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0183-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0184-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0185-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0187-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0190-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0191-1920px.jpg) 
![Photo](https://raw.githubusercontent.com/modelica/fmi-beginners-tutorial-2023/main/photos/231009-modelica23-0192-1920px.jpg)

# Copyright and License

Code and documentation copyright (C) 2023 the Modelica Association Project FMI.
Code released under the [2-Clause BSD License](https://opensource.org/licenses/BSD-2-Clause).
Docs released under [Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/).

fmi-beginners-tutorial-2023

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