Structural properties of large-scale systems possessing similar structures

This paper discusses a class of large-scale interconnected systems composed of several subsystems with similar structure and an external system. Under some assumptions on the interconnections, it is shown that some important qualitative properties such as connectability, structural controllability, structural observability and the occurrence of structurally fixed modes for such a large-scale system can be determined by the corresponding properties for the partly decoupled system or modified subsystem corresponding to the system.

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