Dymola and the Pneumatics Library (formerly PneuLib) allow you to optimize and verify the design of your pneumatic drive system from the early design phases through control design and implementation. Contrary to special-purpose tools for the same type of simulations, the Pneumatics Library has an open, object-oriented architecture so that all models can be inspected as source code in Modelica and customised to fit the individual user's needs. Dymola and the Pneumatics Library are especially designed for multi-domain system modelling, e.g. pneumatics, mechanics and electronics.
Users can connect components freely as they desire, so it is easy to realize non-standard configurations.The library models are based on extensive literature research, several years of experience and validation in advanced research applications and industrial projects.
The Pneumatics Library is distributed by Dassault Systèmes.
Examples
Competing products for pneumatic simulation are mostly oriented towards solving sizing problems and are often distributed by pneumatic component manufacturers. The Pneumatics Library gives completely different capabilities when it comes to multi-domain problems and control design. Modelon has used the Pneumatics Library in combination with the Modelica Standard library for a model of a jack-hammer that combines 3D-mechanics with animation, pneumatics and a simple combustion model as the energy source. The model is highly non-linear, with a tight coupling between the mechanical and pneumatic dynamics.
Modelica is designed to model all physical systems. That means that multi-domain systems can be modeled with one language and one simulator, the cumbersome coupling of several tools is not necessary. This is an example of the coupling of analogue electronics and pneumatics. The paper describes all the details.
Technical Information
The library Pneumatics Library contains the most important components,in order to model pneumatic circuits. Coupling elements exist to connect pneumatic components with blocks of the blocks library and elements of the Modelica.Mechanics library.
This library supports the following types of models:
Modelling of 1-dimensional rotational and translational pneumatic systems.
As a state variable the gas mass in a lumped volume is used.
Each component of the main library has a lumped volume connected at each port. The components can therefore be connected in any sequence.
Connection Rules for Elements
All elements of the main Pneumatics library can be connected together in an almost arbitrary way. As almost every component of the main library has a lumped volume at each port a model can be build by just connecting the appropriate library components. The user does not have to add lumped volumes at each node to model the pressure dynamics. Dymola will reduce the index of the resulting DAE and solve it.
Experienced users can use the additional Basic libraries that can be found in the main library. Those components have not included lumped volumes at the ports and therefore the user has to add the required volumes or can use numerical solution of algebraic equations.
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