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...Dynamics of rotating machinery analysis identication and control athesis submitted to the university pisa for degree doctor philosophy by emiliano rustighi supervisors prof c carmignani ssa p forte corso di dottorato ricerca in ingegneria meccanica ii ciclo department mechanical nuclear production engineering italy february title abstract performance requirements that modern machines must satisfy have introduced a trend toward higher speeds more stringent vibration levels basic tools full reduction vibrations are analy sis rotor systems design proper elements use devices supports which important characterized with culty modulating functions method was applied identify parameters hydrodynamic bearings they were identied both numerically experimentally encouraging results moreover magneto rheological squeeze lm damper is presented anddiscussed numerical simulation an experimental campaign carried out since damping characteristics can be varied continuously controlling magnetic eld it pos...