How to restart a simulation from a given state Often it is useful to be able to repeatedly restart a simulation from a given state. This is useful when we have a model that needs to simulate for a significant amount of time to reach a stable operating point...
Modelica supports a concept called conditional components which provides a convenient mechanism to include or remove effects from a model through the change of a single parameter. This means that the same models can be reused for different types of studies where different effects have to be considered. The...
When creating your own libraries you may want to reference data files that are used within your model. However when another user installs your library they might install it in a different location so any links referencing the data files have to be done in such a way that...
How to write messages to the simulation log Outputting data and messages to the simulation log is a useful way for the model to communicate results or operation with the user. There are a number of ways that this can be done. The assert function The assert function can...
Component orientated modelling provides a convienent method of clicking on components to bring up a dialog of parameters to control that components behaviour. As model size and component count increases however, it is often more desirable to collate information from several different places so that data can be controlled...
This is a glossary of terms used when talking about Dymola and Modelica. Class All of the following are defined as a Modelica Class: Record – used to define data structures Block – fixed causality normally used within control systems Types – can be used to extend built-in types....
Component and system models can be defined once and then reused for different types of analysis. This is achieved by simply changing the boundary conditions that we impose on the model. Symbolic manipulation automatically rearranges the model equations. The example below illustrates how a hybrid powertrain model can be...
The possibilities for model reuse extend beyond running time domain simulations. It is possible to reuse models so that they can derive component parameters or the required control inputs to meet the targets set for the overall system. The example model below is able to determine the torque converter...
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