The OpenModelica Integrated Modeling, Simulation, and Optimization Environment

Abstract

OpenModelica is currently the most complete opensource Modelica-and FMI-based modeling, simulation, optimization, and model-based development environment. Moreover, the OpenModelica environment provides a number of facilities such as debugging; optimization; visualization and 3D animation; web-based model editing and simulation; scripting from Modelica, Python, Julia, and Matlab; efficient simulation and co-simulation of FMI-based models; compilation for embedded systems; Modelica-UML integration; requirement verification; and generation of parallel code for multi-ore architectures. The environment is based on Modelica and uses an extended version of Modelica for its implementation. This overview paper intends to give an up-to-date brief description of the capabilities of the system, and the main vision behind its development.

Cardiovascular Function and Ballistocardiogram: A Relationship Interpreted via Mathematical Modeling

“…The values adopted in this work are summarized in Table 1. The mathematical model has been implemented in OpenModelica [36], an open-source Modelica-based modeling and simulation environment intended for industrial and academic studies of complex dynamic systems. Model results have been obtained using a differential algebraic system solver, DASSL [37], with a tolerance of 10 −6 and a time step of 0.001 s. We simulated 8 cardiac cycles, each lasting 0.8 s, for a total simulation time of 6.4 s, in order to obtain a periodic solution.…”

On Standardized Model Integration : Automated Validation in Aircraft System Simulation

“…The modeling tools, supporting model export according to the FMI standard, in focus within the frame of this thesis are Dymola [39], OpenModelica [40] and Matlab/Simulink [41] for physics-based modeling, and Matlab/Simulink for the development of controlling S/W. Currently, Dymola and OpenModelica have native support for the export and import of Functional Mock-up Units (FMUs).…”

Hybrid Simulation Safety: Limbos and Zero Crossings

“…However, in this case, the order matters. As it turns out, the simulator (OpenModelica v1.11 [8]) executes the constructs in linear order, which is the reason for the different simulation traces for Fig 3(d) and Fig 3(e). We have an accidental deterministic behavior, where the original model was nondeterministic, but where the simulation result is deterministic.…”