JModelica.org is a commercial software platform based on the

Modelica Modelica is an object-oriented, declarative, multi-domain modeling language for component-oriented modeling of complex systems, e.g., systems containing mechanical, electrical, electronic, hydraulic, thermal, control, electric power or process-o ...

modeling language for modeling, simulating, optimizing and analyzing complex dynamic systems. The platform is maintained and developed by Modelon AB in collaboration with academic and industrial institutions, notably

Lund University , motto = Ad utrumque , mottoeng = Prepared for both , established = , type = Public research university , budget = SEK 9 billion Functional Mock-up Interface The Functional Mock-up Interface (or FMI) defines a standardized interface to be used in computer simulations to develop complex cyber-physical systems. The vision of FMI is to support this approach: if the real product is to be assembled from a ...

standard. * A Python package for simulation of dynamic models, Assimulo. Assimulo provides interfaces to several state of the art integrators and is used as a simulation engine in JModelica.org. * Algorithms for solving large scale dynamic optimization problems implementing local

collocation method In mathematics, a collocation method is a method for the numerical solution of ordinary differential equations, partial differential equations and integral equations. The idea is to choose a finite-dimensional space of candidate solutions (usually ...

s on finite elements and pseudospectral

s. * A Python package for user interaction. All parts of the platform are accessed from Python, including compiling and loading models, simulating and optimizing. JModelica.org supports the Modelica modeling language for modeling of physical systems. Modelica provides high-level descriptions of hybrid dynamic systems, which are used as a basis for different kinds of computations in JModelica.org including simulation, sensitivity analysis and optimization. Dynamic optimization problems, including optimal control,

trajectory optimization Trajectory optimization is the process of designing a trajectory that minimizes (or maximizes) some measure of performance while satisfying a set of constraints. Generally speaking, trajectory optimization is a technique for computing an open-loop ...

, parameter optimization and model calibration can be formulated and solved using JModelica.org. The Optimica extension enables high-level formulation of dynamic optimization problems based on Modelica models. The mintOC project provides a number of benchmark problems encoded in Optimica. The platform promotes open interfaces for integration with numerical packages. The Sundials ODE/DAE integrator suite, the NLP solver

IPOPT IPOPT, short for "Interior Point OPTimizer, pronounced I-P-Opt", is a software library for large scale nonlinear optimization of continuous systems. It is written in Fortran and C and is released under the EPL (formerly CPL). IPOPT implement ...

and the AD package CasADi are examples of packages that are integrated into the JModelica.org platform. JModelica.org is compliant with the

Functional Mock-up Interface The Functional Mock-up Interface (or FMI) defines a standardized interface to be used in computer simulations to develop complex cyber-physical systems. The vision of FMI is to support this approach: if the real product is to be assembled from a ...

(FMI) standard and Functional Mock-up Units (FMUs), generated by JModelica.org or by another FMI-compliant tool, can be simulated in the Python environment. An independent comparison between JModelica.org and the optimization systems ACADO Toolkit, IPOPT, and CppAD, is provided in the report Open-Source Software for Nonlinear Constrained Optimization of Dynamic Systems. The Eclipse plug-in for editing of Modelica source code has been discontinued. On December 18, 2019, Modelon decided to move the JModelica.org source code from open to closed source. The last open-source release is available for download on request. Assimulo, PyFMI and FMI Library are now on GitHub.

References

{{Reflist, 2 Simulation software Simulation programming languages Mathematical optimization software Free simulation software Declarative programming languages Object-oriented programming Free software programmed in Python

See also

References