The Modelica language and Dymola are typically used to simulate complex systems. These system models are constructed from many smaller component and subsystem models, in a hierarchical structure with multiple levels. So searching code to find where variables or parameters are defined in a complex model can appear difficult,...
Tag Archive for: parameter
Sign Conventions, for variables with a positive and negative direction, are common place in the engineering world. VeSyMA is no different, with many commonly used variables adhering to a sign convention. Most of the time, VeSyMA follows the ISO (International Organisation for Standardisation) standard for a variable or quantity...
In Dymola 2019 FD01, it has been made easier than ever to carry out a parameter sweep study. There is indeed an integrated capability in the software and its interface has been improved in this latest release. Let’s have a look at an example. Let’s run the example DoublePendulum...
Making flexible models: utilising the replaceable model declaration One of the easiest ways of handling the propagation of a plethora of parameters from model variants designed to be replaceable (sharing a base class) is the replaceable model declaration. As my colleague demonstrates in a previous blog post, such a...
This blog post is a continuation from a previous post on the Modelica Language. This blog post focuses on the syntax used in equations and algorithms and the difference between the two. Calculations Equation Sections Models and blocks primarily use an equation section to define the calculations of the...
This blog post is a continuation from a previous post on the Modelica Language. This blog post goes into a little more detail regarding variable definition and syntax in equations and algorithms. The Class Restriction of a class can restrict the ability to use certain elements and methods, also described...
Background – Why does steering feel matter? Creating a realistic feel to the steering of a vehicle model is very important for DiL simulations, due to the role torque feedback through the steering wheel plays in how the driver interprets the dynamic response of the vehicle. A vehicle with...
As Modelica is an object oriented language, most models in Dymola are composed of several subsystems, spread over several levels. Navigating down the hierarchy of a model from the top level in order to find the one parameter we are looking for can seem like looking for a needle in a...
Once you’ve got comfortable with creating models using components in the Diagram layer you will probably need to create your own models. This requires understanding and implementation of the Modelica language. This, like any other coding language, must be written in the correct order, with the correct punctuation. This...
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