Active lubrication applied to radial gas journal bearings. Part 1: Modeling

Stefano Morosi, Ilmar Santos

Research output: Contribution to journalJournal articleResearchpeer-review


Active bearings represent a mechatronic answer to the growing industrial need to high performance turbomachinery. The present contribution aims at demonstrate the feasibility of applying active lubrication to gas journal bearings. The principle of operation is to generate active forces by regulating radial injection of lubricant through the means of piezoelectric actuators mounted on the back of the bearing sleeves. A feedback law is used to couple the dynamic of a simplified rotor-bearing system with the pneumatic and dynamic characteristics of a piezoelectric actuated valve system. Selected examples show the considerable performance advantages of such new kind of bearing.
Original languageEnglish
JournalTribology International
Issue number12
Pages (from-to)1949-1958
Publication statusPublished - 2011


  • Active lubrication
  • Fluid filmbearings
  • Active vibrationcontrol
  • Mechatronic system

Fingerprint Dive into the research topics of 'Active lubrication applied to radial gas journal bearings. Part 1: Modeling'. Together they form a unique fingerprint.

Cite this