Szukana fraza: [Abstract = "A structural approach to the disturbance decoupling problem of non\-linear systems is introduced. For this purpose, in analogy to linear systems theory, a structural description of non\-linear systems is defined. In associating a directed graph to such a system, two important system properties, the differential output rank and the structure at infinity, can be characterized in terms of input\-output paths. Based on this concept, the disturbance rejection problem can be easily solved. Moreover, necessary conditions valid for general \- non structured \- systems can be defined in a graph\-theoretic way. The advantages of this approach are demonstrated by illustrative examples."]

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