eng Science and Education Publishing Journal of Mechanical Design and Vibration 2014-05-25 2 1 25 30 10.12691/jmdv-2-1-3 JMDV2014213 article M. Rajasekhar mr_sekhar21@yahoo.co.in 1 Dr. J. Srinivas 2 Department of Mechanical Engineering, Gitam Institute of Technology, Gitam University, Visakhapatnam, India Department of Mechanical Engineering, National Institute of Technology Rourkela, Rourkela, Orissa, India This paper presents active amplitude control methodology of a turbocharger rotor using the electromagnetic actuator design. Vibrations in such high-speed engine rotors are inevitable especially while crossing the critical operating speeds. From durability considerations, the rolling element and journal bearings are now-a-days replaced by compliant gas bearings. In present work, the rotor is discretized as a finite element model comprising three Timoshenko beam elements with consideration of gyroscopic effects. Unbalance and gravity are considered as the external forces. Dynamics response of the rotor is obtained by solving resultant dynamic equations using implicit time-integration scheme. An in-house program developed first computes critical operating states and with the help of existing theory of electromagnetic actuators, the vibration amplitudes of system are minimized by providing calculated additional external forces. Control led vibration amplitudes at a disk node is illustrated. http://pubs.sciepub.com/jmdv/2/1/3/jmdv-2-1-3.pdf turbocharger rotor finite element modelling electromagnetic actuator active vibration control air foil bearing