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SUMMARY:IGM Colloquium: Controllable Fluid Film Bearings – Theory & Expe
 riments
DTSTART:20180306T121500
DTEND:20180306T131500
DTSTAMP:20260919T120307Z
UID:aea2f70e730cd2205efdc1ed39eacdb6c0aeb1417eef1a8f28652b63
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Ilmar Santos\, Technical University of Denmark\nIndustry
  4.0 embraces a set of technologies enabling smart products. Smart product
 s are characterized by the capability of performing computations\, storing
  data\, communicating and interacting with their environment. Fluid film b
 earing technology is nowadays witnessing an explosive expansion of active 
 magnetic bearing technology\, a typical so-called smart product. Some of t
 he limitations and drawbacks associated to fluid film bearing technology c
 ould be overcome by combining fluid film bearings with sensing\, control a
 nd signal processing techniques\, lending them “smartness”\, “multi-
 functionality” and “higher reliability”. In such a framework\, it is
  important to evaluate the state-of-the-art of controllable fluid film bea
 rings\, which fit perfectly within Industry 4.0 and have been investigated
  over the last two decades but have not yet found their space in industria
 l applications\, despite several promising theoretical and experimental ac
 hievements.\n \nWith the aim of monitoring\, predicting and controlling s
 liding bearings’ thermal\, static and dynamic characteristics several ty
 pes of sensing systems and electro-mechanical actuators—hydraulic\, pneu
 matic\, piezoelectric or magnetic\, among others—have been coupled to su
 ch bearings allowing for different regulation and control strategies of pr
 essure\, lubricant flow and bearing clearance. Depending on (i) the actuat
 or type\; (ii) the actuation principle\, i.e.\, hydraulic\, pneumatic\, pi
 ezoelectric or magnetic among others\; and (iii) how such an actuator is c
 oupled to the sliding bearings\, different regulation and control actions 
 of fluid film pressure and lubricant flow can be obtained. The most common
  actions are: (a) the control of the injection pressure to modify the flui
 d film pressure statically as well as dynamically\; (b) the adjustment of 
 the angle and direction of injection flow (mostly passive action)\; (c) th
 e control of the sliding bearing gap and its preload via moveable and comp
 liant sliding surfaces\; and (d) the control of the lubricant viscosity. A
 ll four parameters\, i.e.\, pressure\, flow (velocity profiles)\, gap and 
 viscosity\, are explicit parameters in the modified form of Reynolds’ eq
 uations for active lubrication. In this framework\, this work gives one ma
 in original contribution to the state-of-the-art of radial fluid film bear
 ings and controllable lubrication: a comprehensive overview about the diff
 erent types of controllable sliding bearings and principles. Some conclusi
 ve remarks about advantages and drawbacks of the different design solution
 s for controllable sliding bearings are given and the main challenges to b
 e overcome towards industrial applications are addressed.\n\nBio:\n\n	1989
  – 1993 – Reseacher at the Technical University of Munich\, Germany. (
 Dr.-Ing.\, 1993)\n	1993 – 1999 – Assistant/Associate Professor at Camp
 inas State University\, São Paulo\, Brazil. (livre-docente\, 1997)\n	1999
  – 2012 – Associate Professor at the Technical University of Denmark\,
  Denmark. (Dr.techn.\, 2010)\n	2012 up to now – Full Professor at the Te
 chnical Univeristy of Denmark\, Denmark\n\nArea of Interest: Rotordynamics
 \, Tribology\, Dynamics and Control of Multiphysical Systems (Mechatronics
 )\, Active Bearings.\n\n 
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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