“…de Mello, 1991). This kind of model describes the dynamic connections by the transfer functions (Neuman, 1997), (Neuman, Šulc and Jarolímek 1999), (Neuman, Šulc and Dlouhý, 2000) between the inputs and outputs -and various identification methods are used to get the parameters of these functions (Keviczky et al, 1979). Its simplicity is an advantage, and it provides good mathematical bases for control design.…”