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Structure Model and System Decomposition 63
4.5 Conclusion
In this chapter, the existing model formulation for a subsystem, including the state evolution
models, the interacting models (input interacting model and state interaction model), etc., was
introduced first. In addition to the mathematical models, the structure models, important sup-
plementary of mathematical models, are also introduced here to analyze the logical relationship
between each subsystem and to help modeling the mathematical model. The function of the
structure model in system decomposition, the adjacent matrices, input–output accessibility,
and the structure controllability are introduced to investigate the characteristics of the system.
Finally, the classic RGA method is briefly introduced, which provides a quantitative approach
to the analysis of the interactions between the controls and the output.
