Advanced Tutorial Exercises

Otter

Description

Advanced Modelica TutorialExercisesHilding Elmqvist, DynasimMartin Otter, DLRRefine MultiBody/EngineMake Engine example model a reusable component1. Manage parameters2. Allow changing number of cylinders3. Test rig with replaceable engineAdvanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003 2Use Cylinder from Library MultiBodyAdvanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003 3Package structuringFirst create package Then create models, etc within the packageAdvanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003 4Task 1. Handling of parameters• Now – multiple selectDependent on experimentCommon to all cylindersSpecific for each cylinderOK as defaultAdvanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003 5Parameter record• Introduce parameter record for common parameters– Record gives possible reuse of data in different engine configurations– Propagate record elements to individual parameters– Introduce tabs and groupsAdvanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003 6To build record in the GUICreate record Change of setting neededcylinderParameters and insert parameters.Drag and dropAdvanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003 7Copy and paste alternativeDelete this lineContext menu (after paste)Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003 8Create MyCylinderCreate modelMyCylinder and insert a ...

Informations

• Publié par: Ommo
• Nombre de lectures: 71
• Langue: English

Extrait

Advanced Modelica Tutorial Exercises

Hilding Elmqvist, Dynasim Martin Otter, DLR

Refine MultiBody/Engine

Make Engine example model a reusable component 1. Manage parameters 2. Allow changing number of cylinders 3. Test rig with replaceable engine

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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Use Cylinder from Library MultiBody

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Package structuring

First create package

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Then create models, etc within the package

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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Task 1. Handling of parameters

 Now  multiple select

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003  

Parameter record

Dependent on experiment

Common to all cylinders

Specific for each cylinder OK as default

 Introduce parameter record for common parameters  Record gives possible reuse of data in different engine configurations  Propagate record elements to individual parameters  Introduce tabs and groups

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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To build record in the GUI c C y r li e n a d te e   r r P e a c r o a r m d eters and Change of setting needed insert parameters.

Drag and drop

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Copy and paste alternative

Context menu (after paste)

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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Delete this line

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Create MyCylinder Create model MyCylinder and insert a cylinder from the MultiBody library and a parameter record.

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Propagate parameters Propagate each parameter in the record to the corresponding  parameter of the MultiBody cylinder. Point to the input field and click the right mouse button and create Component  reference.

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3 4, 2003 -

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Add remaining parameters Add remaining 3 parameters.

Test MyCylinder by creating a component in Unnamed and double clicking it.

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Hierarchical dialogs

Introduce tabs and groups

Resulting dialog with tabs and groups

Improve dialog by introducing tabs and groups.

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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Propagate connectors

Propagate connectors by drawing connections. At end point, click right mouse button and select Create connector

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Resulting Modelica code

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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Introduce World object and Revolute joint

Make MyEngine

 Axis of rotation for Revolute joint is x-axis  Set initial angular velocity to 1 deg/s  Simulate for 0.1 second

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Declare parameter set

Declare a parameter set by extending the parameter record.

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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Make parameter set

Give values to the parameter set by using the Parameter command of the extended class. Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Use parameter set

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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Instead of using the hierarchical parameter dialog, use the Select Record command to create a record constructor referring to the predefined parameter set.

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Resulting Modelica Code

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Task 2. Array of cylinders

 Make array of cylinders  Propagate parameter record to each cylinder  Introduce arrays of individual angles  Use for loop to connect them

Duplicate MyEngine. Call it MyEngineN. It will contain n cylinders.

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

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MyCylinder parameter dialog MyEngineN parameters:

For MyEngineN introduce a parameter record, n and the angle vectors. Introduce an array of cylinders [n] and propagate the parameters. Use the each keyword to the cylinder parameters since all the cylinders have the same set.

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Cylinder array connections

Advanced Modelica Tutorial - Exercises, Modelica'2003, Nov. 3-4, 2003

Use Modelica Text mode to generate a for statement and make the connections.

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