History
Dymola was initially designed in 1978 by Hilding Elmqvist, for hisApplication domains
Dymola has multi-engineering capabilities which mean that models can consist of components from many engineering domains. Using the Modelica language, sub-systems are represented by interconnected components; at the lowest level dynamic behavior is described by mathematical equations or algorithms. Connections between components form additional equations. Dymola processes the complete system of equations in order to generate efficient simulation code. Domain-specific knowledge is represented by Modelica libraries, containing components for mechanical, electrical, control, thermal, pneumatic, hydraulic, power train, thermodynamics, vehicle dynamics, air conditioning, etc. For commercial libraries Dymola supports information hiding and encryption. Typical application areas which are facilitated by Modelica libraries include:Automotive
The automotive applications fall into three main categories. The engine and drive train are modeled using the Engines and Powertrain libraries. The flexibility of the open Modelica language is particularly suitable for modeling hybrid or alternative drive trains using the Battery, Brushless DC Drives and Electrified Powertrains libraries. Modal bodies or flexible shafts are available through the Flexible Bodies library. Engine and battery cooling is supported by the Cooling library, which can be combined with the HVAC library. The Human Comfort library adds models of occupant comfort for complete vehicle thermal modeling. Controller components are available in the Modelica Standard Library. The hierarchically structured, open-source, Modelica models offer unprecedented flexibility for multiple vehicle configurations while reusing common components.Aerospace and Defense
A multitude of libraries offer the capacity to model the complex thermo-fluid systems of aircraft, ranging from fuel systems to environmental control. The Human Comfort library provides additional models of occupant comfort for cabin thermal modeling. The Flight Dynamics library enables the rapid modeling, simulation and analysis of the flight dynamic characteristics of a wide range of aircraft and UAVs. Actuators for flight control and other subsystems use the Brushless DC Drives and Electrified Powertrains libraries. Flexible beams and modal bodies from Finite Element models are managed by the Flexible Bodies library.Energy, Process and Utilities
Ever more stringent requirements on environmental impact drive the trend towards more detailed modeling of physics and control systems. The Heat, Ventilation and Air Conditioning (HVAC) library allows you to minimize building HVAC operating costs by selecting the correct system control strategy and avoid costly HVAC system design errors early in the building design process. The Human Comfort Library provides an integrated approach to simulate the thermal comfort within an occupied building or vehicle. Thermo-fluid system are typically modeled with the ThermalSystem library. The Industrial Process Simulation library is focused on paper and pulp industries.Industrial Equipment
All kinds of industrial equipment can be modeled using the mechanical libraries of the Modelica Standard Library, including 3D multi-body systems. Other options are flexible beams and modal bodies originating from a Finite Element model. Actuators and control systems are modeled with Battery, Brushless DC Drives and Electrified Powertrains libraries. The thermal properties of industrial machinery are easily modeled with the Cooling library.Third-party libraries
In addition to the libraries available in the Dymola product portfolio, several libraries have been developed by third parties, such as, ClayteTools and interoperability
Model design tools
The ''Model Calibration'' option is based on a process where measured data from a real device is used to tune parameters such that the simulation results are in good agreement with the measured data. The ''Design Optimization'' option is used to tune parameters of a device or its controller to improve system dynamics for multiple criteria and multiple cases. The ''Model Management'' includes support for encryption of models, version control from Dymola and utilities for checking, testing and comparing models. Also included is support for common version management tools, such as Concurrent Versions System, CVS, SVN,Code and model export
For most steps during system development (dimensioning, detailed design, implementation), it is important to have access to a C code image of the model to run hardware in the loop, rapid prototyping simulations or to build simulators for validation or training purposes. Several options are available to achieve those activities. Dymola supports import and export according to the Functional Mockup Interface (FMI). With appropriate options the exported code can be generated for export without any run-time license, or as source code. The exported Functional Mockup Units can then be used on several simulation platforms.Cloud support
In addition to the standalone application on Windows and Linux, the Dymola simulation technology is also available on the cloud, offering a streamlined user interface with customizable dashboarding and pre-defined experiment setup.See also
* AMESim *References
External links
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