Citation
Christopher Brooks, Adam Cataldo, Edward A. Lee, Jie Liu, Xiaojun Liu, Stephen Neuendorffer, Haiyang Zheng. "HyVisual: A Hybrid System Visual Modeler". Technical report, EECS Dept., UC Berkeley, July, 2005.

Abstract
The Hybrid System Visual Modeler (HyVisual) is a block-diagram editor and simulator for continuous-time dynamical systems and hybrid systems. Hybrid systems mix continuous-time dynamics, discrete events, and discrete mode changes. This visual modeler supports construction of hierarchical hybrid systems. It uses a block-diagram representation of ordinary differential equations (ODEs) to define continuous dynamics, and allows mixing of continuous-time signals with events that are discrete in time. It uses a bubble-and-arc diagram representation of finite state machines to define discrete behavior driven by mode transitions. In this document, we describe how to graphically construct models and how to interpret the resulting models. HyVisual provides a sophisticated numerical solver that simulates the continuous-time dynamics, and effective use of the system requires at least a rudimentary understanding of the properties of the solver. This document provides a tutorial that will enable the reader to construct elaborate models and to have confidence in the results of a simulation of those models. We begin by explaining how to describe continuous-time models of classical dynamical systems, and then progress to the construction of mixed signal and hybrid systems. The intended audience for this document is an engineer with at least a rudimentary understanding of the theory of continuous-time dynamical systems (ordinary differential equations and Laplace transform representations), who wishes to build models of such systems, and who wishes to learn about hybrid systems and build models of hybrid systems. HyVisual is built on top of Ptolemy II, a framework supporting the construction of such domain-specific tools. See Ptolemy II for more information.

Electronic downloads

• http://ptolemy.eecs.berkeley.edu/publications/papers/05/hyvisual/

• HTML

  Christopher Brooks, Adam Cataldo, Edward A. Lee, Jie Liu,
  Xiaojun Liu, Stephen Neuendorffer, Haiyang Zheng. <a
  href="http://chess.eecs.berkeley.edu/pubs/66.html"
  ><i>HyVisual:  A Hybrid System Visual
  Modeler</i></a>, Technical report,  EECS Dept.,
  UC Berkeley, July, 2005.

• Plain text

  Christopher Brooks, Adam Cataldo, Edward A. Lee, Jie Liu,
  Xiaojun Liu, Stephen Neuendorffer, Haiyang Zheng.
  "HyVisual:  A Hybrid System Visual Modeler".
  Technical report,  EECS Dept., UC Berkeley, July, 2005.

• BibTeX

  @techreport{BrooksCataldoLeeLiuLiuNeuendorfferZheng05_HyVisualHybridSystemVisualModeler,
      author = {Christopher Brooks and Adam Cataldo and Edward A.
                Lee and Jie Liu and Xiaojun Liu and Stephen
                Neuendorffer and Haiyang Zheng},
      title = {HyVisual:  A Hybrid System Visual Modeler},
      institution = {EECS Dept., UC Berkeley},
      month = {July},
      year = {2005},
      abstract = {The Hybrid System Visual Modeler (HyVisual) is a
                block-diagram editor and simulator for
                continuous-time dynamical systems and hybrid
                systems. Hybrid systems mix continuous-time
                dynamics, discrete events, and discrete mode
                changes. This visual modeler supports construction
                of hierarchical hybrid systems. It uses a
                block-diagram representation of ordinary
                differential equations (ODEs) to define continuous
                dynamics, and allows mixing of continuous-time
                signals with events that are discrete in time. It
                uses a bubble-and-arc diagram representation of
                finite state machines to define discrete behavior
                driven by mode transitions. In this document, we
                describe how to graphically construct models and
                how to interpret the resulting models. HyVisual
                provides a sophisticated numerical solver that
                simulates the continuous-time dynamics, and
                effective use of the system requires at least a
                rudimentary understanding of the properties of the
                solver. This document provides a tutorial that
                will enable the reader to construct elaborate
                models and to have confidence in the results of a
                simulation of those models. We begin by explaining
                how to describe continuous-time models of
                classical dynamical systems, and then progress to
                the construction of mixed signal and hybrid
                systems. The intended audience for this document
                is an engineer with at least a rudimentary
                understanding of the theory of continuous-time
                dynamical systems (ordinary differential equations
                and Laplace transform representations), who wishes
                to build models of such systems, and who wishes to
                learn about hybrid systems and build models of
                hybrid systems. HyVisual is built on top of
                Ptolemy II, a framework supporting the
                construction of such domain-specific tools. See
                Ptolemy II for more information. },
      URL = {http://chess.eecs.berkeley.edu/pubs/66.html}
  }
  

Posted by Mary Stewart on 5 May 2006.
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