Modeling and Optimization with Modelica and Optimica Using the JModelica.org Open Source Platform

Abstract

This paper reports a new Modelica-based open source project entitled JModelica.org, targeted towards dynamic optimization. The objective of the project is to bridge the gap between the need for high-level description languages and the details of numerical optimization algorithms. JModelica.org is also intended as an extensible platform where algorithm developers, particularly in the academic community, may integrate new and innovative methods. In doing so, researchers gain access to a wealth of industrially relevant optimization problems based on existing Modelica models, while at the same time facilitating industrial use of state of the art algorithms. In this contribution, an overview of the platform is presented and the main features of JModelica.org are highlighted.

Model‐Based Tool Integration and Ontology‐Driven Traceability in Model‐Based Development Environments

“…Models and optimization algorithms are combined into an integrated model. Specifically, the systems to be controlled are formulated in Modelica, and the corresponding optimization problems are expressed in Optimica [9]. This allows for efficient optimization of heterogeneous physical systems as simulation models are reused for optimization.…”

Model predictive control for demand flexibility: Real-world operation of a commercial building with photovoltaic and battery systems

“…The goal is to balance model specificity with computational efficiency for use with optimization solvers. MPCPy utilizes JModelica.org [75] to generate and solve a control optimization problem based on the user-provided Modelica model, objective and constraint information and input data (e.g., weather or electricity prices). JModelica.org uses CasADi [76] to compute function derivatives and the optimization algorithm IPOPT [77] to solve the resulting nonlinear problem.…”

Optimal Robot Control Using Modelica and Optimica

“…JModelica.org is a novel Modelica-based open source project targeted at dynamic optimization [4]. JModelica.org features compilers supporting code generation of Modelica models to C, a C API for evaluating model equations and their derivatives and optimization algorithms.…”

“…This work was done using a predecessor of the JModelica.org platform, see [11] and [4]. The predecessor version uses AMPL as intermediate representation format and supports an early version of Optimica.…”