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SIMULATION
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Variable Structure in DEVS Component-Based Modeling and Simulation

Xiaolin Hu

Computer Science Department, Georgia State University, Atlanta, GA 30303, xhu{at}cs.gsu.edu

Xiaolin Hu

Arizona Center for Integrative Modeling and Simulation, Electrical and Computer Engineering Department, University of Arizona, Tucson, AZ 85721

Bernard P. Zeigler

Arizona Center for Integrative Modeling and Simulation, Electrical and Computer Engineering Department, University of Arizona, Tucson, AZ 85721

Saurabh Mittal

Arizona Center for Integrative Modeling and Simulation, Electrical and Computer Engineering Department, University of Arizona, Tucson, AZ 85721

Variable structure refers to the ability of a system to dynamically change its structure according to different situations. It provides component-based modeling and simulation environments with powerful modeling capability and the flexibility to design and analyze complex systems. In this article, the authors discuss variable structure—specifically, the structure change and interface change capability—in DEVS-based modeling and simulation environments. The operations of structure change and interface change are discussed, and their respective operation boundaries are defined. Three examples are given to illustrate the role of variable structure and how it can be used to model and design adaptive complex systems. Principles for the implementation of variable structure are also presented and illustrated in the DEVSJAVA modeling and simulation environment.

Key Words: Variable structure • component-based modeling and simulation • DEVS • adaptive complex systems

SIMULATION, Vol. 81, No. 2, 91-102 (2005)
DOI: 10.1177/0037549705052227
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