Multiphysics engineering with Modelica

Material for the Modelica course offered at CentraleSupélec, campus of Rennes.

Remark: this material heavily links to Michael Tiller’s online book “Modelica by Example” [Tiller-2014] as a way more detailed reference on Modelica. This material is more focused on providing model examples. Main divergences from M. Tiller:

• a different presentation of physical ports (flows & potentials): I believe these concepts all emerges from or along the definition of connect

• a more practical focus on using OpenModelica, while Tiller is completely tool-agnostic which can be difficult for beginner. See e.g. Installing OpenModelica, Getting started with OpenModelica (FR) and OpenModelica inner workings.

The Modelica course also includes a short introduction to Bond graphs, for which slides are available at https://cel.hal.science/hal-03602684.

Course outline

• 1. Context & Objectives
  • 1.1. Context
  • 1.2. Course objectives
• 2. Introduction to Modelica
  • 2.1. Activity
  • 2.2. Ressources
• 3. Describing equations in Modelica
  • 3.1. ODE: Vehicle suspension
  • 3.2. What’s next
• 4. Describing discrete behaviors
  • 4.1. Time event: a buck converter
  • 4.2. State event: diode rectifier
• 5. Physical components in Modelica
  • 5.1. Connecting physical components
  • 5.2. Vehicle suspension with components
  • 5.3. Acausal connection
• 6. Organizing models
  • 6.1. Inheritance: extending models with subclassing
  • 6.2. Packages: structuring a set of models
• 7. Custom components
  • 7.1. Thermistor
  • 7.2. Electro active damper
• 8. More advanced topics
  • 8.1. OpenModelica inner workings
  • 8.2. Version Control with Git
  • 8.3. Modelica frontiers

Modeling Project

• Modeling project
  • Objectives and evaluation criteria
    • Projet exemple: CarProject
    • Evaluation grid
  • Choice of system to model
    • 1. Usine marémotrice
    • 2. Fusibles
    • 3. Drone quadrirotor
    • 4. Inverseur de sources automatique
  • Project presentation

Appendices

• Software environment setup
  • Installing OpenModelica
  • Launching OpenModelica
  • Setting up OpenModelica
  • Git and Gitlab
• Getting started with OpenModelica (FR)
  • Objectives of the videos
  • Prise en main OpenModelica 1 : vue textuelle & simulation
  • Prise en main OpenModelica 2 : paramètres de simulation & paramètres de modèle
  • Prise en main OpenModelica 3 : vue diagramme & vue icône
• References & Ressources
  • Modelica, the language
  • Modelica environments
  • Git
• Glossary