The Howdy Glossary

Modelica is an object-oriented, equation-based language used for modeling complex physical systems across multiple domains such as mechanical, electrical, hydraulic, and thermal components. Developed in the late 1990s by the nonprofit Modelica Association with contributions from companies like Dassault Systèmes, it enables engineers and scientists to create detailed and accurate simulations using differential equations, algebraic equations, and discrete-time logic. The open-source Modelica Standard Library provides a wide range of pre-made components that facilitate the modeling process.

Modelica offers several unique features that distinguish it from other simulation tools. It supports object-oriented modeling for modular and scalable system design and uses an equation-based approach to describe multi-domain systems. This flexibility allows for combining different types of equations to accurately represent component behavior in interconnected systems. Additionally, the extensive Modelica Standard Library streamlines model development by offering a comprehensive set of pre-made components that promote interoperability and efficiency.

Despite competition from other tools like MATLAB/Simulink, VHDL-AMS, Ptolemy II, and LabVIEW, Modelica stands out due to its versatile combination of object-oriented principles, equation-based modeling capabilities, and multi-domain support. Its open-source nature ensures continuous development through an active global community. These strengths make Modelica a robust tool for engineers and scientists who need to design, analyze, optimize complex engineering systems across various fields such as control systems, mechatronics, energy systems, automotive engineering, and aerospace engineering.