Abstract Modeling Demonstration

Abstract : Report developed under BAA contract for CI-98-4-Ol. This effort demonstrated the feasibility of using model abstraction methods to develop high level representations of complex designs. Abstract models are used to reduce complexity, and thus simulation time, while maintaining the essence of the model. This effort demonstrated the effectiveness of abstract modeling by developing abstract models of high-fidelity JMASS-compliant models. Several model abstraction techniques were examined throughout the course of this effort. Sensitivity analyses were used and modified to identify key simulation parameters within the context of the simulation application. Various abstraction techniques were used to develop the abstract model. The differences in accuracy between the abstract models was noted with respect to the original model set. The difference were illustrated through the use of the JMASS Simview Visualization tool. These differences in model accuracy were examined with respect to simulation time to illustrate the types of tradeoffs that system modelers and analysts face when sacrificing fidelity for timely simulations. A demonstration was developed that illustrated the development of the abstract models, the simulation of these abstractions, a graphical comparison of the accuracy of the models, and an analysis of the tradeoffs between accuracy with respect to simulation time.