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1Challenge thefuture
AE4020 Literature Study
Health & Performance Monitoring Using
Active Magnetic Bearing Systems
Abhinav Raj 4182758 Supervisors: Dr Arvin! " Rao #$% Delft& Sreenivas Raghaven!ran #Shell '($&
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2Challenge thefuture
Contents1 A)* S+ste, ( Relevan-e
2 A!vantages of using A)*s
. 'rin-iple of operation
4 /bje-tive
5 Re,ote ,onitoring using A)*s0 ault Classi-ation
7 S+ste, ,o!eling approa-hes
8 Cases to test
3 A!!itional Resear-h
1 Deliverables
11$i,eline
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1. AMB System & Relevance
ntegration of
6 'oer le-troni-s
6 Control S+ste,s 9 ogi-
6 Rotor D+na,i-s
6 le-tro,agneti- $e-hnolog+
6 Co,puting $e-hnolog+
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2. Advantages Of AMBs
Appli-ation
;o ear< noiseless< no lubri-ation< large range of
operational te,peratures< eli,ination of path for -ir-ulating
-urrents
Control
A-tive -ontrol of i,balan-e ( vibration< -an var+ sti=ness
an! !a,ping as re>uire!< ,onitor s+ste, perfor,an-e
'erfor,an-e /perate in -riti-al environ,ents< no lubri-ation relate!
proble,s< eli,inates several -o,ponents fro, s+ste,uations
6 )atab 9 Si,ulin@ Approa-hes
'ure )atab
Ans+s M )atab
)atlab M Si,ulin@
'ure Si,ulin@
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24Challenge thefuture
System Modeling Rotor
6 )atri-es fro, ) softares versus fro, papers
)ore a--urate rotor ,o!el< ,ore D/< larger ,atri? siEe #12
? 12&< sloer -o,putation
) ,o!el ,atri? re!u-tion as -o,pare! to si,ple asse,bl+
Cross -oupling beteen A)* s+ste, an! rotor ,ight not be
-apture!
ali!ation -on-erns
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25Challenge thefuture
System Modeling Rotor
6Be=-ott Rotor vs Real SiEe!
6 nD/
6 )ass ,atri?
6 Sti=ness ,atri?
6 Da,ping ,atri?
6 "+ros-opi- ,atri? Nhen in )otion
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System Modeling AMB
6 Depth of ,o!eling
6 Coils ;u,ber of turns< resistan-e< in!u-tan-e
6 Crossse-tional area of the ele-tro,agnet in the gap
6 Current supplie!
6 A)* or-e relation per ele-tro,agnet vs per pair vsper s+ste,
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System Modeling Control Logic
6 CentraliEe! vs De-entraliEe! Control
6 oltage -ontrolle! vs Current Controlle!
6 Si,ple vs Co,ple?
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System Modeling Control Logic
6 'D
'D -ontrol logi- is si,ple an! ,ost i!el+ applie!
t is better to o,it the integral part sin-e it !estabiliEes-ontrol logi- in -ases of su!!en pea@s or !rops
Nh+ then is 'D preferre! over a si,ple 'D -ontrol for a
A)* supporte! rotor ,o!elO
Disa!v oer fre>uen-+ ( higher nonlinear region
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System Modeling Control Logic
6 ee!ba-@ ineariEation
6 *a-@stepping approa-h
6 ;eural ;etor@ Control
6 uEE+ ogi- Control
6 terative earning Control
6 Auto,ati- earning Control
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.Challenge thefuture
System Modeling Control Logic
6 nnit+ Close! oop Shaping
6 nnit+ /pen oop Shaping
6 P 'ara,eteriEation
6 )u S+nthesis
6 ADR
6 Sli!ing ,o!e -ontrol
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.1Challenge thefuture
System Modeling Control Logic
6 'roble,s asso-iate! ith an a!van-e! -ontrol logi-
a ne line
$oo ,u-h -ontrol
DiK-ult to -apture faults
A!aptive nature ,ight s,other the possibilit+ of
@noing faults in the ,a-hine
$o !ete-t faults or have a s+ste, that @eeps running
even hen there are faults
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System Modeling Rotordynamics
6 *o!e 'lots re>uen-+ response of the s+ste,
=e-t of -hanging !a,ping on the s+ste,
6 ,pulse Response
6$ransfer un-tion ?tra-ting transfer fun-tion fro, the state spa-e
,atri-es of the s+ste,
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System Modeling Rotordynamics
6 'oles
6 Qeros
6 ;atural re>uen-+
6 Resonant re>uen-+ Criti-al Spee!s
Stru-tural Resonan-e
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System Modeling Rotordynamics
6 Da,ping Ratio
6 DC "ain
6 ;+>uist 'lot
6 igen alues< igen e-tors
6 Ca,pbell Diagra,
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5. Series Of Steps
1 Resear-h various a+s to !evelop a robust ,o!el that-an provi!e a goo! representation of the !+na,i-s of
the s+ste, fro, rotor !+na,i-s point of vie
2 Resear-h on the various failure ,o!e anal+sis for arotor on A)* s+ste,
. "et a goo! overvie of the s+ste, fro, anoperational point of vie to un!erstan! hat
para,eters are -ru-ial in or!er to assess the health of
the s+ste,
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5. Series Of Steps (Contd.)
4 Che-@ for hat !ata is available fro, an A)* s+ste, an!
ho the re>uire! para,eters -an be !erive! fro, the,
Current fo-us here involves e?tra-ting real ti,e thrust
,easure,ents an! vibration values using rotor properties
para,eters -an be e?tra-te! b+ !eveloping a relation ,ap
beteen available an! !esign !ata or thrust bearing< a .a+ relation beteen thrust for-e< -ontrol
-urrent an! gap nee!s to be establishe!
or vibration !ata< a relation ill have to be built beteen -urrent
an! position $he interest here is not the vibration seen ith the
in-rease! -ontrol -urrent but the vibration a,plitu!es of the rotor
hen si,pl+ levitate! but not -ontrolle! $he in-reasing vibrationtren! -an provi!e a goo! i!ea of fouling or rotor !a,age
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5. Series Of Steps (Contd.)
5 *uil! a -ause an! e=e-t ,atri? here the failures are
,at-he! against the para,eter values $his ,atri? illrepresent ho -ertain para,eter values going out ofboun! on the upper or loer li,it -an in!i-ate thein-ipient faults in the s+ste,
0 *uil! a rotor!+na,i- ,o!el to e?plain the or@ing of an
A)* s+ste, along ith -ru-ial plots of orbits< Ca,pbell!iagra, et- $his ,o!el ill be use! to open up the bla-@bo? operation of the A)* s+ste,
7 $est the ,atri? vali!it+ using -ase !ata fro, sites an! the,o!el
8 A!!ing a!!itional !iagnosti- -apabilit+ b+ using an
algorith, to -he-@ for sensor faults $his ill be vali! onl+for slo failures or faults in the sensors
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Case Studies
6 Coil Saturation D+na,i-s
6 Stable Rotor!+na,i-s
6 %nstable Rotor!+na,i-s Continuous Disturban-e
6 %nstable Rotor!+na,i-s Disturban-e /utsi!e i,its
6 Rotor evitation
6 =e-t of in-rease! unbalan-e ariation in Current
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Other Research Thrust Force
6 )'F's*oo@1?ls?
6 )'$R%S$ CAC%A$/;S2Designan!anal+sisof
thrusta-tive,agneti-bearingp!f
6 Challenges Available !ata
ali!ation
A--ura-+
http://imp/KPIs/Book1.xlsxhttp://imp/THRUST%20CALCULATIONS/02.Design_and_analysis_of_thrust_active_magnetic_bearing.pdfhttp://imp/THRUST%20CALCULATIONS/02.Design_and_analysis_of_thrust_active_magnetic_bearing.pdfhttp://imp/THRUST%20CALCULATIONS/02.Design_and_analysis_of_thrust_active_magnetic_bearing.pdfhttp://imp/THRUST%20CALCULATIONS/02.Design_and_analysis_of_thrust_active_magnetic_bearing.pdfhttp://imp/KPIs/Book1.xlsx -
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Other Research User Note
6 Fe+ aspe-ts of spe-if+ing an A)*
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41Ch ll h
Timeline
6 )o!eling ( ali!ation De-e,ber n! )o!el of Rotor< A)* ith a!van-e! -ontroller
ali!ation ith e?isting results
Repla-e a!van-e! -ontroller ith 'D9'D if -ontrol is too
high
6$esting -ases ( result interpretation irst half of
Banuar+
6 Report< -onsultation an! !efense Se-on! half ofBanuar+