User manual MAPLESOFT MAPLESIM 4

[. . . ] MapleSim User's Guide Copyright © Maplesoft, a division of Waterloo Maple Inc. 2008-2010 MapleSim User's Guide Copyright Maplesoft, MapleSim, and Maple are all trademarks of Waterloo Maple Inc. No part of this book may be reproduced, stored in a retrieval system, or transcribed, in any form or by any means -- electronic, mechanical, photocopying, recording, or otherwise. Information in this document is subject to change without notice and does not represent a commitment on the part of the vendor. [. . . ] In the Port Components table, in the Position row, select s[b](t) from the drop-down menu and, in the Force row, select F[b](t) from the drop-down menu. The left port is now defined as a translational flange and associated with the position variable s[b](t) and force variable F[b](t). From the Port Type drop-down menu, select Translational Flange. 60 · 3 Creating Custom Modeling Components 8. In the Position row, select s[a](t) from the drop-down menu and, in the Force row, select F[a](t) from the drop-down menu. The right port is now defined as a translational flange and associated with the position variable s[a](t) and force variable F[a](t). This port is now defined as a signal input and associated with the stiffness variable c(t). This port is now defined as a signal input and associated with the damping variable d(t). Drag the port that you defined in step 14 and place it at the top right of the diagram. You can also drag the other port to position it. The ports will be displayed in this arrangement when you generate the custom component in MapleSim. Generating the Custom Component To generate the custom component, click the Generate MapleSim Component button at the bottom of the template. When it is generated, the custom component is displayed in the Definitions palette located in the Project tab in MapleSim. 3. 4 Working with Custom Components in MapleSim · 61 You can now add the NonLinearSpringDamper custom component to a model by dragging it into the model workspace. 3. 4 Working with Custom Components in MapleSim In MapleSim, you can work with a custom component in the same ways as you would work with a subsystem. You can perform the following tasks: Add Text and Illustrations to a Custom Component To customize the appearance of a custom component, you can change the default images that are displayed in the component icon. Select the custom component in the model workspace, click the icon view button ( ) in the navigation toolbar, and use the drawing and annotation tools to add text and illustrations. Save a Custom Component as Part of the Current Model To save a custom component as a part of the current model, add the component by dragging it into the model workspace and then save the model. The next time you open the file, the custom component will be displayed in the model workspace and Definitions palette. Add a Custom Component to a Custom Library If you want to use a custom component in a file other than the current model, add the component to a custom library. For more information, see Creating and Managing Custom Libraries (page 43). 62 · 3 Creating Custom Modeling Components 3. 5 Editing a Custom Component If you want to edit a custom component that you have generated, make your changes in the corresponding Maple worksheet and regenerate the component. In the MapleSim model workspace, double-click the custom component that you want to edit. In the Maple worksheet, edit the equations, properties, or port values. Your changes are generated in the custom component displayed in MapleSim. Save your changes in the . mw file and the . msim file to which you added the custom component. 4 Simulating and Visualizing a Model In this chapter: · How MapleSim Simulates a Model (page 63) · Simulating a Model (page 66) · Simulation Progress Messages (page 71) · Managing Simulation Results (page 71) · Customizing Plot Windows (page 72) · Visualizing a Multibody Model (page 78) · Best Practices: Simulating and Visualizing a Model (page 96) 4. 1 How MapleSim Simulates a Model Modelica Description The equations for many components in the MapleSim library are described using the Modelica physical modeling language. On the other hand, the equations for multibody components are generated by a special-purpose engine, which uses advanced mathematical techniques to ensure that the equations are as concise and efficient as possible. For more information about Modelica, visit http://www. modelica. org. Model Description Each component in your model contains a system of equations that describes its behavior; these systems of equations can consist of purely algebraic equations or differential equations. [. . . ] Click the probe in the model workspace. 6. 4 Tutorial 4: Modeling a Planar Slider-Crank Mechanism · 127 4. In the Inspector tab, select the Length quantity to measure the displacement. In the same way, add a probe that measures the Angle quantity to the white 1-D rotational flange at the top right of the component icon. When the simulation is complete, the following graphs are displayed. 9. [. . . ]