Research Papers

Integrating Models and Simulations of Continuous Dynamics Into SysML

[+] Author and Article Information
Thomas Johnson, Aleksandr Kerzhner, Christiaan J. J. Paredis, Roger Burkhart

e-mail: chris.paredis@me.gatech.edu Model-Based Systems Engineering Center, The G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332tjohnson6@gatech.edu Deere & Company World Headquarters, Moline, IL 61265 e-mail: BurkhartRogerM@johndeere.comtjohnson6@gatech.edu

J. Comput. Inf. Sci. Eng 12(1), 011002 (Dec 21, 2011) (11 pages) doi:10.1115/1.4005452 History: Received August 03, 2011; Revised October 26, 2011; Published December 21, 2011; Online December 21, 2011

In this paper, we combine modeling constructs from systems modeling language (SysML) and Modelica to improve the support for model-based systems engineering (MBSE). The Object Management Group has recently developed the systems modeling language (OMG SysML™ ). This visual modeling language provides a comprehensive set of diagrams and constructs for modeling many common aspects of systems engineering problems, such as system requirements, structures, functions, and behaviors. Complementing these SysML constructs, the modelica language has emerged as a standard for modeling the continuous dynamics of systems in terms of hybrid discrete-event and differential algebraic equation systems. In this paper, the synergy between SysML and Modelica is explored at three different levels: the definition of continuous dynamics models in SysML, the use of triple graph grammar based transformations to map between these SysML constructs and the corresponding Modelica models, and the integration of simulation experiments with other SysML constructs to support MBSE. Throughout the paper, an example of a car suspension is used to demonstrate these contributions.

Copyright © 2012 by American Society of Mechanical Engineers
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Figure 1

The SysML car suspension model

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Figure 2

BDD of the MSD continuous dynamic system behavior model

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Figure 3

Parametric diagram of the MSD model

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Figure 4

Triple Graph Grammar Formalism [31]

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Figure 5

Simplified Modelica metamodel represented in MOF

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Figure 6

Functionality of SysML-Modelica plugin

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Figure 7

Model library profile for capturing “black box” models

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Figure 8

Example use of stereotypes on blocks to define a reference to a model library as well as a reference to a model within that library

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Figure 9

Definition of mass–spring–damper example using external library models

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Figure 10

Capturing relationships between external library models

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Figure 11

Code generated from MSD model

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Figure 12

BDD of the SuspensionSimulation block

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Figure 13

Parametric diagram of the ModelContext

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Figure 14

Parametric diagram of SuspensionSimulation

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Figure 15

BDD of the SuspensionAnalysis block

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Figure 16

Parametric diagram of SuspensionAnalysis




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