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Structural Singularities and Ideal Mechanical Systems

Written by: David Briant – Project Engineer Creating multibody models can be quite complicated; getting the geometry correct, linking components with correct joint types and getting mass and inertias correct, all have big effects on the motion of mechanical systems and the correlation of simulated models against real systems. This can be made easier, in some read more

Posted on Monday, July 17th, 2017

How to easily split models and create submodels in Dymola

Written by: Romain Gillot – Project Engineer An interesting functionality in Dymola is the capability to split and duplicate parts of a model. This can be done by selecting some components (at least 2) on the diagram layer of the model and right-clicking. The following window pops up with an option to split the model: read more

Posted on Friday, July 7th, 2017

The merits of using the Vehicle Interfaces template library

Written by: Theodor Ensbury – Project Engineer To fully harness the object orientated nature of Modelica based simulation in reducing resource wastage on model variant development and maintenance, it is sensible to utilise an efficient template structure of some description. The Vehicle Interfaces library from the Modelica Association provides the most efficient way of fully utilising the read more

Posted on Thursday, June 29th, 2017

How to build an embedded graphical interface in Dymola

Written by: Maura Gallarotti – Project Engineer Dymola allows to create embedded graphical user interfaces thanks to the icon annotations. This blog post describes how to visualise in the diagram layer the transient processes with plots, tables and dynamic colouring. Figure 1: Cooling circuit transient animation. Figure 1 shows the GIF of a cooling circuit of an read more

Posted on Monday, June 19th, 2017

Handling of Modelica Model’s Parameter Values in Dymola

Written by: Raees B. K. Parambu – project Engineer Abstract This article is designed to guide the user in handling or organising the parameter values of the top-level experimental models in their models. This blog post may be useful for those newcomers who wish to get an insight into different ways of storing and propagating parameter read more

Posted on Thursday, June 8th, 2017

VeSyMA – Engines Library

Written by: Alessandro Picarelli – Chief Engineer The VeSyMA – Engines library provides the necessary components for creating semi-empirical and predictive engine models. These models can then be used in standalone experiments (e.g. engine-on-dynamometer) or within vehicle model architectures. Modelling philosophy The library allows both MVEMs (Mean Value Engine Models) and CAREMs (Crank Angle Resolved read more

Posted on Friday, May 26th, 2017

VeSyMA – Suspensions Library

Written by: David Briant – Project Engineer A recent addition to the Dassault Systemes Dymola portfolio is the Suspensions library, developed by Claytex, built on the platform of the VeSyMA Library. This library focuses on the development of suspension systems primarily for the investigation of vehicle handling, including road, driver and stability control models. The VeSyMA library read more

Posted on Friday, May 19th, 2017

Idle speed control using Model-based sliding mode control

Written by: Xiaoran Han – Project Engineer Introduction Following the previous blog post, ‘Linearised Mean Value Engine Model-based Idle Control‘, which describes how to derive a linearised model of crank angle resolved engine for idle speed controller design, this article describes the design of a sliding mode controller based on the linearised model and shows simulation read more

Posted on Friday, May 12th, 2017

Stability Analysis in Dymola – Part 3

Written by: Sas Harrison – Systems Engineer Introduction This article will explain the nature of a root-locus diagram and explain how to create one using the DYMOLA software. For students & researchers, we hope the article will open up possibilities to use DYMOLA as the modular, acausal & smart, explicit-analysis software of choice, for control(ler) design & read more

Posted on Friday, May 5th, 2017

FMI Blockset for Excel

Written by: Vesel Haxha – Senior Developer The FMI Blockset for Excel allows FMUs to be simulated from within Microsoft Excel. It is a Claytex in-house built tool and provides Add-ins for Microsoft Excel written in .Net. The FMI Blockset for Excel is compliant with the FMI 2.0 Co-simulation interface and it consists of: FMI Blockset shown in read more

Posted on Sunday, April 23rd, 2017

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