1. yItungHa', qaH QaQ tIH HablI' dynamic ngaD yItungHa', qaH QaQ shafts, qaSlaH cha' pedestals, arranged HablI' QongDaq, Hoch pedestal upper lopno' mounted wepDaj 'ej rotary vIHtaHbogh axis 'ej ngaq bertlham yItungHa', qaH QaQ tIH ngaD wa'DIch vibration noch 'oH vibrations upper 'ay' ghot'e' vo' unbalance yItungHa', qaH QaQ tIH law' law' vISangchu'Qo'chugh detects 'ej DaH nobvam spindle qar Hev DaH nobvam comprising ngaD qaSlaH wa'DIch qechmeyDaj Huj tlhab ghotvetlhDaq motlh spindle axis, qu' 'oH net cha'DIch vibration noch baS 'ay' upper vibrations detects neH qaSlaH cha'DIch qechmeyDaj Huj tlhab ghotvetlhDaq mounts upper je, qaSlaH wa' pedestal, raD involved 'ej signals chaH links qaStaHvIS HaQchorHey mIw qu' 'oH net je' vibration signals wa'DIch cha'DIch vibration noch 'ej chov circuit jIHMej vibration poj vibration tor 'e' unbalance nIv yItungHa', qaH QaQ tIH neH evaluation computed wej 'el 'ay' upper excitations.

2. signals ngaD HablI' according to DoQ 1, qu' 'oH net arranged wejDIch vibration noch upper 'ay' qaSlaH wa' pedestal 'ay' upper vibrations detect neH spindle axis lurgh je configured chov circuit vo' vibration qIlmeH pIj wejDIch vibration noch axial raD excitation je axial raD excitation vo' 'ay' teq neH unbalance measurement evaluation signals vibration imbalance patlh SIm.

3. method dynamic ngaD yItungHa', qaH QaQ shafts ngaD HablI' according to DoQ 1, lo' qu' 'oH net unbalance measurement yItungHa', qaH QaQ shafts, qu' 'oH net much chev reference qet Hoch cha' pedestals ngaD HablI', much pagh pagh 'eS transverse raD 'ej excitation ghomchoH, qet reference wa'DIch comprising nung calibrate mIw qet cha'DIch reference transverse raD excitation magnitude vISov , 'ej wejDIch reference qet je ghomchoH excitation Sov magnitude, signals harmonically detect vibration signals reference qet poj ghajHa'ghach chaH parameters 'ej chaHvaD calculation calibrate matrix lo', je vibration chov ngevwI', qaStaHvIS subsequent unbalance measurement yItungHa', qaH QaQ tIH pong SIm lo' SIm matrix, calibrating qabwIj 'e' unbalance nIv yItungHa', qaH QaQ tIH wej 'el tor vibration excitations neH evaluation.

4. harmonically poj, ngevwI' calibration factor, 'ej pa' subsequent yItungHa', qaH QaQ tIH measurement unbalance method according to DoQ 3, qu' 'oH net neH calibrate mIw much latlh reference, qet axial raD excitation 'ej detected upper 'ay' qaSlaH wa' pedestal neH spindle axis lurgh vibrations pong vibration noch. , chev vo' vibration signals unbalance lo'laHghach calculation.
PHCW-1000-2000（工件）.jpg

description:

REFERENCE RELATE APPLICATIONS HUB'EGHTAHVIS

priority 35 'ach ghaytan feb. 12, 2013 teywI' u.s.c. §119 german Application ghobe' 10 2013 101 375.9 DoQ applicants.

YOTLH CHAB

yItungHa', qaH QaQ tIH HablI' dynamic ngaD yItungHa', qaH QaQ shafts, qaSlaH cha' pedestals, arranged HablI' QongDaq, Hoch pedestal wepDaj-mounted upper 'ay' rotary vIHtaHbogh axis 'ej ngaq bertlham yItungHa', qaH QaQ tIH ngaD wa'DIch vibration noch 'oH vibrations upper 'ay' ghot'e' vo' unbalance yItungHa', qaH QaQ tIH law' law' vISangchu'Qo'chugh detects 'ej DaH nobvam spindle qar mounting DaH nobvam comprising ngaD relates chab involve raD qaStaHvIS qaSlaH wa'DIch qechmeyDaj Huj tlhab ghotvetlhDaq motlh spindle axis. relates SaH chab novpu' nejtaH method dynamic ngaD yItungHa', qaH QaQ shafts.

PATMEY LULO'TA' CHAB

vISov yItungHa', qaH QaQ tIH ngaD HablI', Hotlhlu'bogh ghap maH alia jan 28 02 367 b2 'ej u.s. pat. ghobe' 6,694,812 b2. qaStaHvIS yItungHa', qaH QaQ tIH HablI' ngaD, Hev yItungHa', qaH QaQ shafts ngaD DeSDu' either 'er'In pong rotary spindle pedestal. qeng spindle neH bearing housing Qutlh pedestal by means of wepDaj. arranged wepDaj, baS generally por springs, qaStaHvIS mIw upper 'ay' as a result of Don displacement spindle axis vibrate enabling 'ej responding neH transverse raD lIng imbalance yItungHa', qaH QaQ tIH 'ej Daqvo' upper 'ay' vegh pemvaD spindle je. pagh wanHa' ghomchoH Daqvo' yItungHa', qaH QaQ tIH pemvaD qel configured yItungHa', qaH QaQ tIH HablI' ngaD pedestals je jan Vas plane, 'aD ghaH wa' vibration noch arranged pedestal upper 'ay' vibrations detect neH qechmeyDaj Huj tlhab ghotvetlhDaq motlh spindle axis pedestal Hoch unbalance. qaSchoH tob configuration qaStaHvIS qeq.

pa' crankshaft HablI' Sov vo' jan 15 73 670 b2 ngaD, qeng bearing bracket pedestal cha' vibration-detecting raD transducers pIm 'aD lurgh qaStaHvIS bearing plane jIQot ghaj. split cha' raD transducers signals pong circuits according to cartesian vibration 'ay', mu'mey 'oS circular 'ej polar pagh anti-circular 'ay' chov.

imbalance pat Hay'DI' qeng rotor qaStaHvIS cha' bearings by means of 'emDaq SIQ lugh narghpa' jp 57_165_731_a. wa'DIch vibration noch bearing 'emDaq vibrations detecting DaH nobvam 'ej logh therefrom, cha'DIch vibration noch 'aD neH rap lurgh je wa' wa'DIch 'ej vibrations 'ay' arranged DeSDu' bearing 'emDaq bertlham coupling detecting Hoch bearing.

SUMMARY CHAB

ghaH nIS yItungHa', qaH QaQ shafts DeSDu' relatively jen speeds in the vicinity of motlh qet speed ghur 'aD, 'e' legh veb speeds laH qawlu' qIH poQ unbalance measurement accuracy yonba' 'ach 'aghta' 'oH. vaj object SaH chab yItungHa', qaH QaQ tIH Segh initially referred qar measurements je legh veb ngaD speeds close to motlh qet speed yItungHa', qaH QaQ tIH enables baS HablI' ngaD DuHIvDI'. latlh object SaH chab Dub method Segh initially referred DuHIvDI'.

with regard to yItungHa', qaH QaQ tIH HablI' ngaD, rIn object referred pong features DoQ 1qaStaHvIS recited. lut'e' advantageous embodiment ngaD HablI' qaStaHvIS DoQ 2. with regard to method, rIn object referred pong method features recited neH DoQ 3'ej rIn qaStaHvIS development method je features neH DoQ 4recited.

qaStaHvIS yItungHa', qaH QaQ tIH chab HablI' ngaD, cha'DIch vibration noch baS 'ay' upper vibrations detects neH qaSlaH cha'DIch qechmeyDaj Huj tlhab ghotvetlhDaq mounts upper je, qaSlaH wa' pedestal, vibration signals wa'DIch vibration noch cha'DIch je' chov circuit baS vibration signals links je poj je Qo' HaQchorHey mIw 'e' vibration excitations upper 'ay' tor chaH unbalance nIv yItungHa', qaH QaQ tIH computed evaluation pa' 'el.

movement Saturjaj 'ay' tor vIHtaHbogh axis extending neH lurgh transverse spindle axis 'ej transverse Sev instead Dab qaStaHvIS realization vibrations Hay'DI' qawlu' vIH spindle axis purely Don muH pedestal upper 'ay', in the presence of relatively jen ngaD speeds 'ej in spite of exclusive excitation pe'vIl transverse unbalance je wepDaj ngaq Dev rotation, axis motlh luH chab SaH wepDaj ngaq lurgh Dev. nup DeSDu' jen speeds je ghaH speed ghur, chaq tor resonance lIng DeSDu' jIHMej qawlu' respond exclusively raD radial 'ach highly Hap ghomchoH excitation pedestal upper 'ay' luH dynamic stiffness wepDaj upper 'ay', tor ghotvetlhDaq counteracts baS stiffness, Qutlh. owing to configuration ngaD HablI' chab, by means of cha'DIch vibration noch detected neH cha'DIch qechmeyDaj Huj tlhab ghotvetlhDaq tor ghotvetlhDaq much 'ej chev vo' imbalance-induced vibration 'ay' qaStaHvIS chov calculation lopno' upper vibrations. qaStaHvIS DochHa'meH webqu'meH nov reduce 'aD accuracies luH veb ngaD speeds.

according to chab latlh proposal, chaq arranged wejDIch vibration noch upper lopno' pedestal lopno' upper vibrations detect neH spindle axis lurgh, ghaH chov circuit configured axial raD excitation qIlmeH pIj vo' vibration signals wejDIch vibration noch je axial 'ay' teq neH unbalance measurement evaluation excitation vo' vibration signals raD imbalance patlh SIm.

'e' rotationally frequent axial raD jIHMej chaq 'ay' interference luH neH vibration signals detected vibration noch unable adversely unbalance measurement accuracy Sov wIHutlh 'utmo' Dujvam ghaj embodiment ngaD HablI'. chaq qaStaHvIS rotationally frequent raD axial unbalance measurement yItungHa', qaH QaQ shafts HeghDI' pagh axial compensation neH slide member axially displaceable homokinetic pemvaD joq chenmoH ghaj roD.

calibrate mIw unbalance measurement yItungHa', qaH QaQ shafts nung DaH nobvam chab method, qaStaHvIS chev jIHMej qet reference much Hoch cha' pedestals ngaD HablI', wa'DIch reference pagh pagh 'eS transverse raD 'ej ghomchoH excitation, cha'DIch reference je transverse raD excitation Sov magnitude, qet qet much comprising je wejDIch reference qet ghomchoH excitation magnitude vISov , signals harmonically detect vibration signals reference qet poj ghajHa'ghach chaH parameters 'ej chaHvaD calculation calibrate matrix lo', je vibration chov ngevwI', qaStaHvIS subsequent unbalance measurement yItungHa', qaH QaQ tIH pong SIm lo' SIm matrix, calibrating qabwIj 'e' unbalance nIv yItungHa', qaH QaQ tIH wej 'el tor vibration excitations neH evaluation.

qaStaHvIS qaStaHvIS embodiment method, chaq chenmoH provision neH calibrate mIw latlh reference, qet axial raD excitation upper je, pedestal vibrations detect neH spindle axis lurgh by means of vibration noch, chaHvaD poj harmonically, chaHvaD ngevwI' je calibration factor je, subsequent unbalance measurement yItungHa', qaH QaQ tIH , chaH chev vo' vibration signals unbalance lo'laHghach calculation.

QAS DESCRIPTION 'ETLHDAJ LEL CHAY'

QIj SaH chab neH latlh detail qaStaHvIS tlha' lom nolwI'pu' with reference to embodiments illustrated neH lutlhej 'etlhDaj lel chay', qu' 'oH net:

FIG. 1 schematic representation prior SoH'a' yItungHa', qaH QaQ tIH HablI' ngaD; je

FIG. 2 schematic representation pedestal yItungHa', qaH QaQ tIH chab HablI' ngaD.

DETAIL DESCRIPTION 'ETLHDAJ LEL CHAY'

basic construction Sov ngaD HablI' 10 Hech ngaD yItungHa', qaH QaQ shafts cha' FIG. 1. HablI' QongDaq 12 baS 13, pedestals cha' DaH nobvam ngaD HablI' 10 arranged 14 opposite chuq. respective waw' 15, 16 mounted longitudinal displacement neH linear DevwI' extending neH longitudinal lurgh HablI' QongDaq 12 'ej movable SabtaHbogh pedestals 13, bIr mIw wIje'laHbe'chugh vaj 14 yItungHa', qaH QaQ tIH Hev 'ab chuq adapt ghaj pedestals. waw' 15, upper 'ay' 17, 18, qeng 16 respectively, ngaq vay'e' by means of wepDaj 19, 20. Hoch 'ay' upper 17, respective spindle 21, 22 mounted rotation neH housings SIQ ma' 18 . spindles 21, coaxially arranged 'op DeSDu' qab megh'an jan 23, bIr mIw wIje'laHbe'chugh vaj 24 accurately centrally fastening 'er'In, example bertlham flange, yItungHa', qaH QaQ tIH W. Sam clamping bIr mIw wIje'laHbe'chugh vaj 22 cha' 'ay' upper 17, 18 qaSlaH wa' upper 'ay', qaStaHvIS 'etlhDaj lel chay' yItungHa', qaH QaQ nguSDI' 25 spindle 22 HIjmeH adapted DaH nobvam upper 'ay' 18, 'eb 'ej So'meH thereby ghotvetlhDaq mount yItungHa', qaH QaQ tIH w qaStaHvIS jIr. latlh spindle 21 vInaD rotatable together with mount 'er'In yItungHa', qaH QaQ tIH w, 'ach chaq quvmoH 'e' qawqu' DuHIvDI' 'oH je yItungHa', qaH QaQ nguSDI'. Hoch 'ay' upper 17, respective vibration noch 26, 27 vibrations respective lopno' upper 17, bIr mIw wIje'laHbe'chugh vaj 18 qaStaHvIS wa' lurgh, detects pa' chong lurgh embodiment 'ej electrical signals va chov 'ej compute jan chenmoH chaH Daqvo' DaH nobvam novpu' nejtaH 18 . rotary movement spindles 21, 22, 'aD quvmoH 'e' qawqu' rar 'oH chov 'ej compute jan je DuHIvDI' noch tajvaj--rotation electric 28 .

during 'aD qet yItungHa', qaH QaQ tIH bIr mIw wIje'laHbe'chugh vaj 18 pedestals 13, 14yItungHa', qaH QaQ legh speed Ω. yItungHa', qaH QaQ tIH w Sey vibrations upper 'ay' 17, unbalances w. detected vibrations 'ej speed je yItungHa', qaH QaQ tIH 10 qIlmeH pIj qaStaHvIS cha' planes measurement unbalance enable phases 'ej magnitudes. measurement planes yItungHa', qaH QaQ tIH planes axis rotation motlh 'ej juS vegh botlh pemvaD SeH pong unbalance induced raD Daqvo' SoH pa' Hoch q raD transverse yItungHa', qaH QaQ tIH flanges mounted spindles. likewise detected yItungHa', qaH QaQ tIH flanges coupling 'ay' 'ej unbalances measurement planes neH. conventionally configured 'ej arranged qabwIj 'e' as a result of excitation oscillate upper 'ay' 15, bIr mIw wIje'laHbe'chugh vaj 16 pedestals 13, 14 pe'vIl transverse qaStaHvIS mIw axles spindles 21, bIr mIw wIje'laHbe'chugh vaj 22 Don movements, muH thereby leH lurgh motlh measurement planes luH wepDaj 19, bIr mIw wIje'laHbe'chugh vaj 20 pedestals 13, bIr mIw wIje'laHbe'chugh vaj 14 yItungHa', qaH QaQ tIH HablI' ngaD. vaj pedestals 13, respond 14 exclusively transverse raD luH yItungHa', qaH QaQ tIH unbalance 'ej Daqvo' pemvaD ghot'e' thereby chav. jIHbe'mo', unbalance jan unbalance plane 'aD 'oS yItungHa', qaH QaQ tIH HablI' ngaD conventionally pedestal Hoch.

tob neH qeq 'ej satisfactory ghot'e' DeSDu' 'eS speeds lIng Sov je conventional configuration yItungHa', qaH QaQ tIH HablI' ngaD. toward tIH-elastic behavior, qaStaHvIS nIS yItungHa', qaH QaQ shafts DeSDu' relatively jen speeds in the vicinity of pIq motlh qet speed ngaD ghot'e' jIHaDchoHQo' 'ach chaq yItungHa', qaH QaQ shafts. ghaH yItungHa', qaH QaQ tIH watlh Don vibrations, vabDot HeghDI' exclusively pe'vIl transverse, SeymoH qawlu' muH pedestal upper 'ay', qet DeSDu' veb speeds, position yoqvaD pedestal upper 'ay' nitlhDaj lo'taHvIS boQwI'vaD tu'moH neH FIG. 2 qaStaHvIS dash tlhegh cf. vibrations 'ay' ghotvetlhDaq, tor ngaS instead. qawlu' responds pedestal raD transverse exclusively, 'ach je ghomchoH SIH. vaj 'ay' luH pe'vIl (rotationally frequent) transverse {lugh arrow rIn (q)}(t) 'ej 'ay' luH (rotationally frequent) wanHa' ghomchoH {lugh arrow rIn (m)}(t). Sev signal 'oH 'u'₁(rut) vibration noch chev SabtaHbogh cha' Hegh'e' 'oHbe' qIt lo'lu'DI' Vas vibration noch per pedestal. loQ ram wanI' qaSmoHlu'bogh, qal determination unbalance pong ghomchoH yIvang pedestal upper 'ay'. laH webqu'meH nov measurement tlhe' Qagh pong noch vISangchu'Qo'chugh lo' cha' mIw chay' chab SaH.

according to chab SaH equipped upper je, yItungHa', qaH QaQ tIH HablI' ngaD pedestals cha' tlhIH wa'DIch cha'DIch vibration noch je. pedestal 13 yItungHa', qaH QaQ tIH HablI' 10 DaH nobvam upper 'ay' 17 according to chab cha' vibration noch 26, 29ngaD cha' FIG. 2. logh cha' vibration noch 26, bIr mIw wIje'laHbe'chugh vaj 29 pedestal 13 vo' Hoch latlh pong tev chuq, as a result of baS pIm signals 'oH 'u'_1,1(rut) 'oH 'u'_1,2(rut) qIpmoHDI' chaH superimposed vibrations Don 'ej tor. harmonically poj measurement signals vibration noch, conventionally lo' ngaD cham

$pointer representation u (t) = \vec{u} \cdot e^{ ω t} = (\begin{matrix} u_{re} \\ u_{im} \end{matrix}) \cdot e^{ ω t} .$

excitation pedestal, SaS 'ej 'ay' chong

$\vec{U} = (\begin{matrix} U_{h} \\ U_{v} \end{matrix}), \vec{M} = (\begin{matrix} M_{h} \\ M_{v} \end{matrix}), \vec{Q} = (\begin{matrix} Q_{h} \\ Q_{v} \end{matrix})$

lIH neH Quv pat tI' rotor.

excitation raD je, excitation ghomchoH, tlha' linear correlation vaj 'uch teH

$(\begin{matrix} Q_{h} \\ Q_{v} \\ M_{h} \\ M_{v} \end{matrix}) = (\begin{matrix} a & b & c & d \\ - b & a & - d & c \\ e & f & g & h \\ - f & e & - h & g \end{matrix}) \cdot (\begin{matrix} u_{1, re} \\ u_{1, im} \\ u_{2, re} \\ u_{2, im} \end{matrix}),$

nuqDaq tlhab chorgh neH qaStaHvIS parameters 4 × 4 calibration matrix muHIvtaHbogh symmetries. laH qIlmeH pIj roD empirically pong 'angbogh Da tlhap neH reference mach excitation {lugh arrow rIn (q)}⁰≈0, {lugh arrow rIn (m)}⁰≈0 ghIq wa'DIch 'ej cha'DIch excitation, Sov magnitude, example {lugh arrow rIn (q)}^jIHqet, example yInISQo' q^kal, {lugh arrow rIn (m)}^jIH≈0, {lugh arrow rIn (q)}^ghu'vam≈0 = , {lugh arrow rIn (m)}^ghu'vamm^kal, = je noch signals poj harmonically 'ej {lugh arrow rIn ('oH 'u')}₁⁰, {lugh arrow rIn ('oH 'u')}₁^jIH, {lugh arrow rIn ('oH 'u')}₁^ghu'vam, {lugh arrow rIn ('oH 'u')}₂⁰, {lugh arrow rIn ('oH 'u')}₂^jIH, {lugh arrow rIn ('oH 'u')}₁^CHA'pol.

suitably, chaq lIng excitation pong waH unbalance elements lan spindle. je ghoS qel Hoch pedestal separately.

parameters tlhab chorgh... Suq h ghaH equations transposition pong linear equation pat chenmoH solving

$\underline{\underline{A}} \cdot (\begin{matrix} a \\ b \\ c \\ d \\ e \\ f \\ g \\ h \end{matrix}) = (\begin{matrix} Q_{h}^{I} - Q_{h}^{0} \\ Q_{v}^{I} - Q_{v}^{0} \\ M_{h}^{I} - M_{h}^{0} \\ M_{v}^{I} - M_{v}^{0} \\ Q_{h}^{II} - Q_{h}^{0} \\ Q_{v}^{II} - Q_{v}^{0} \\ M_{h}^{II} - M_{h}^{0} \\ M_{v}^{II} - M_{v}^{0} \end{matrix})$

wuv harmonically poj measurement signals differences matrix coefficients

({lugh arrow rIn ('oH 'u')}₁^jIH− {lugh arrow rIn ('oH 'u')}₁⁰), ({lugh arrow rIn ('oH 'u')}₁^ghu'vam− {lugh arrow rIn ('oH 'u')}₁⁰), ({lugh arrow rIn ('oH 'u')}₂^jIH− {lugh arrow rIn ('oH 'u')}₂⁰), ({lugh arrow rIn ('oH 'u')}₂^ghu'vam− {lugh arrow rIn ('oH 'u')}₂⁰).

wa'logh Sov calibration matrix, 'oH DuH transverse raD 'eb 'ej So'meH ghomchoH excitation Hoch measurements subsequent chev:

$(\begin{matrix} Q_{h} \\ Q_{v} \end{matrix}) = (\begin{matrix} a & b & c & d \\ - b & a & - d & c \end{matrix}) \cdot (\begin{matrix} u_{1, re} \\ u_{1, im} \\ u_{2, re} \\ u_{2, im} \end{matrix}),$

'ej respectively.

$(\begin{matrix} M_{h} \\ M_{v} \end{matrix}) = (\begin{matrix} e & f & g & h \\ - f & e & - h & g \end{matrix}) \cdot (\begin{matrix} u_{1, re} \\ u_{1, im} \\ u_{2, re} \\ u_{2, im} \end{matrix}) .$

vaj apply tlhoQ subsequent naQ ngaD HablI' cha' pedestals.

wa'DIch 'ej cha'DIch pedestal excitations raD transverse

$(\begin{matrix} Q_{1, h} \\ Q_{1, v} \end{matrix}), (\begin{matrix} Q_{2, h} \\ Q_{2, v} \end{matrix})$

laH vaj je' conventional unbalance computation. unbalance calibration vaj Daq tlhap pong Sov unbalance elements lan neH measurement planes yItungHa', qaH QaQ tIH actual. qaStaHvIS DochHa'meH qIt measurement Qagh luH pong 'angbogh Da ghomchoH tlhoS wabmeyvetlh by means of noch cha'DIch eliminate.

ghomchoH excitations wa'DIch 'ej cha'DIch pedestal

$(\begin{matrix} M_{1, h} \\ M_{1, v} \end{matrix}), (\begin{matrix} M_{2, h} \\ M_{2, v} \end{matrix})$

normally buSHa'. bopummeH Dochvam'e' yIteqneS jay', vutmeH waH jotlhmeH exceeded vuS lo'laHghach, check SeH 'angbogh Da ghomchoH flanged-'ay' vuS, 'angbogh Da imbalance, apart from je possibly nej yItungHa', qaH QaQ shafts manufacturer.

chaq je qaS measurement qay' 'IjmeH pagh axial compensation (example slide member pagh displaceable homokinetic pemvaD) yItungHa', qaH QaQ tIH. interference 'ay' qaStaHvIS measurement signal chaq vaj lIH rotationally frequent raD axial. according to chab pong wejDIch vibration noch 30 applying upper 'ay' 17 pedestal 13, qIt excitation detect pe'vIl rotationally frequent axial 'ej 'oH qel neH unbalance calculation. ghoS chu' analogous wa' neH foregoing Del. wa'DIch much reference qet HurDaq excitation ghIq qet wej calibrating transverse raD excitation, ghomchoH excitation 'ej excitation axial raD. qaStaHvIS ghoS rotationally frequent raD axial bovvam Qatlh Du'meyDaq vI'Iprup SeH pagh rIn 'oH pong waH unbalance elements placement. phase-teH raD exciter lo' DaH nobvam wa' nuH, 'ach considerable expense involve. latlh qeq-orientated ghaH, example yItungHa', qaH QaQ tIH 'ab compensation bogh Sam clamp fixture je define axial offset neH. reference qet wa'DIch cha' qet enabled 'ab compensation calibrating, Qotlh je 'ach Qav calibrating qet 'oH. wa'vatlh subsequent quantification 'aD axial raD DuH wej, laH 'ach chev 'ej vo' unbalance measurement eliminated chaH.