... 10 2010 adaptive control machine bearings machine control magnetic bearings transient analysis turbomachinery vibration control Active magnetic bearings (AMBs) offer many advantages over conventional bearings because they provide contact free and lubrication free levitation...

... 26 03 2009 03 03 2010 machine control magnetic bearings rotors During normal operation, the rotor in a rotor/magnetic bearing system levitates without contact with stator structures. However, during a fault condition, the rotor orbit may be sufficiently large to induce rotor...

... machines machine bearings machine control magnetic bearings mechanical stability 12 08 2008 29 10 2008 29 09 2009 The AMB currents are proportional to the accelerations estimated from the displacement using the acceleration estimator described by Eq. 22 . 27 { i x...

... compressible flow density finite volume methods fracture machine bearings machine control rotors stratified flow turbomachinery vibration control viscosity 28 03 2008 06 05 2008 29 09 2009 β local air volume fraction β 0 reference air volume...

... rotors machine control vibration control magnetic bearings wavelet transforms transient response control system synthesis signal reconstruction machine bearings Rotor/magnetic bearing systems may experience disturbances giving rise to transient rotor vibration. Unbalance changes, flow...

.... 16 June 2003 01 Oct 2002 01 Mar 2003 15 04 2005 gas turbines transient analysis thermal stresses machine control angular velocity control Microturbines are now considered ready to conquer energy markets thanks to their flexibility and low maintenance, which should...

... control system analysis control system synthesis machine control standards The rotordynamic performance of API 617 standards provides two primary requirements. First, the standard stipulates system damping near the expected operating speed range. This takes the form of a combination of damping...

... bearings rotors machine control dynamic response feedback sensitivity magnetic hysteresis bushings electric sensing devices An initial unbalance condition of the rotor was established such that ∼ 24 Hz the largest orbit was at the nondriven end disk. Also the rotor could be run...

... actuation, the controller works well. 01 10 2003 01 03 2004 electromagnetic actuators shafts rotors blades vibration control vibration measurement observability controllability transducers eddy currents centralised control machine control turbines Blade faults...

.... Associate Editor: M. Mignolet. 01 Oct 2001 28 Oct 2002 15 08 2003 electric machines rotors vibration control machine control control system synthesis The large amplitude at critical speeds is one of the most serious concerns of high-speed rotating machines. It may cause...

... must be connected to such bearings, for instance squeeze-film dampers ( 1 ) and ( 2 ). rotors lubrication machine bearings machine control control systems design engineering eigenvalues and eigenfunctions frequency response modelling 08 May 2000 01 Nov 1999 01 Feb...