In the Dymola compilation process the Modelica model is translated and a dymosim executable file is created. This blog post looks at how this dymosim executable can be called directly from the Windows cmd or from the Linux terminal. This information is in the Full Dymola User Manual Section...
Archive for category: Concepts and methods
One of the benefits of VeSyMA, and simulation in general, is the ability to answer “what if” questions using predictive models in experiments such as drive cycles. Sensitivity testing is a common and effective method of study. One parameter of a model is varied, with all others kept static,...
Whilst Dymola is good at solving nonlinear equations in models automatically, this post has a look at how to create a function that solves a nonlinear equation. A useful tool when required, as well as a way to get further insight into how nonlinear equations are solved. Why solve...
Modelica and Dymola provide library developers with methods to hide content from their users; some of which were discussed in this previous post Dymola Library Concealment – How to, and why? – Claytex. As developers we may use these concealment methods to protect our intellectual property, or we may...
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...
Calculate partial derivatives of a Modelica model in Dymola.
Modelica scripts (.mos) are very useful. Alongside similarities to the Windows “batch” script of interactive commands, they can be used to store any interactive event. Some common uses of scripts can be to store useful sequences of commands, as is the case of plot scripts, or to set Advanced...
We wrote about the installation of Dymola on Linux earlier on in 2021. This blog post looks at giving a quick guide to installation of Dymola on Windows. The Dymola installer is the same regardless of whether you have a Dymola licence or not. It is the licence that...
When creating models it can be difficult to work out the best route to getting the best result most efficiently and with the best usability. Modelica and all the Claytex Libraries use a system of inheritance as described in the 8th Dymola Basics post. This means that extending from...
This post looks at a simple way to check that derivatives of a function are correct and in the process explores some of the different plotting features of Dymola. When should derivatives be checked? Most of the time it is best to let Dymola calculate derivatives (see automatically-getting-derivatives-of-a-function-in-dymola). However...
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