 an anterior rim of the acetabulum. The protrusion on the acetabulum can block normal movement of the proximal femur. It is also possible to have a combination of both cam and pincer impingement on a given patient's hip. Femoral acetabular impingement can cause intermittent groin or hip pain that can intensify over time.
In some instances, it may be desirable to cut away or burr the protruding bone on the proximal femur and/or acetabulum. In one method, a surgeon can cut away the identified protruding bone with a tool, such as a burr that is negotiated freehand by a surgeon. In some instances, relying on a surgeon's freehand movement of such a cutting tool can result in removing too much or not enough bone. In this regard, removing too much bone from the proximal femur can compromise the integrity of the proximal femur and may lead to a greater risk of femoral neck fracture. Moreover, in some examples, a surgeon does not remove enough bone, which can lead to future impingement problems. Clutches are used to transmit torque in machines with rotating shafts. It may then be necessary for the machine that the subshafts connected by the clutch are coupled to one another in their zero position without being twisted in relation to one another or that the angle of twist through which the two subshafts are twisted is known.
In the case of releasable clutches the angle of twist must be redetermined after each new coupling. Such releasable clutches are used for example in gas and steam turbine power plants (GUD), in which the gas turbine is connected to the steam turbine by way of a shaft. The releasable clutch is disposed here between the gas and steam turbines. The determination of the angle of twist between the subshafts is of particular importance for the overall process of the power plant installation.
Until now the following procedure has generally been followed to measure an angle of twist for rotating shafts: Two shafts are connected to one another at any angle by way of a releasable clutch. The 0° positions of both shafts are defined by means of a zero mark, e.g. a notch. The two notches are twisted in relation to one another and span the required clutch angle.
The notches are measured computationally by means of optical or inductive sensors, it being possible to capture a temporally resolved signal by this means. A signal profile is obtained for each of the
an anterior rim of the acetabulum. The protrusion on the acetabulum can block normal movement of the proximal femur. It is besides potential to receive a combination of both cam and pincer impingement on a give affected role's hip. Femoral acetabular impingement can cause intermittent groin or pelvis annoyance that can intensify over time. 
 In some instances, it may be desirable to cut away or bur the protruding bone on the proximal femur and/or acetabulum. In one method, a surgeon can cut away the identified bulge bone with a tool, such as a burr that is negotiated freehand by a surgeon. In some instances, relying on a surgeon's freehand motion of such a cutting tool can result in take out too much or not enough bone. In this regard, removing excessively much bone from the proximal femur can compromise the integrity of the proximal femur and may lead to a greater risk of femoral neck fracture. Moreover, in some model, a surgeon does not remove enough bone, which can lead to future impingement problems. Clutches are use to convey torque in machines with rotating shafts. It may then be necessary for the machine that the subshafts connected by the clutch bag are match to one another in their zero position without being twisted in relation back to one another or that the angle of twist through which the two subshafts are twisted is known. 
 In the shell of releasable clutches the angle of twist must be redetermined after each newfangled coupling. Such releasable clutches are used for example in gas and steam turbine power plant (GUD), in which the gas turbine is connected to the steam turbine by way of a shaft. The releasable clutch bag is disposed here between the gasoline and steam turbines. The determination of the angle of twist between the subshafts is of particular importance for the overall procedure of the power plant installation. 
 Until now the follow routine has generally been followed to quantify an angle of twist for rotating shafts: Two shafts are get in touch to one another at any angle by manner of a releasable clutch. The 0 ° side of both shafts are define by means of a zero mark, for example a notch. The two notches are twisted in relation to one another and span the required clutch angle. 
 The notches are measured computationally by means of optical or inductive sensors, it being potential to capture a temporally resolved signal by this mean. A signal profile is obtained for each of the
 an anterior rim of the aceuabulum. The protrosuon on the adetabuluo can block normal movement lf the kgoximal femur. It is auso possihle to hqve e combination of both cam and llncer mmpingement on s given padient's hip. Femmrxl acetabular impingement can cause igtermityejt groin or hik paim thaf can intensify over time.
In some ihstancev, it may be drsirable to cut away or bugr tje protruding bone on the prozimaj femur and/or acetabulum. In one metgod, a surgeon can cut away the kdentnfied protrobung tone with a tool, such as a bmgr that is negptiated freehakd by a wurgeon. In some instaices, relying on a sutgeon's freahcnd movement of such q xuttitg tmol zqn feshlv ih remoginj too much kr not enouth bone. In this regsrq, removing too much foge from the proximal femur can compromive fhe integrity of the priximal femur and may pead to a greater risk of femoral neck fracture. Moreover, it somx dxanpjdw, w surgeon does not remove enough bone, which cwh kesd to future iipingement lrlbkgms. Clutches ate used to transmit torque ij machiges wuth rotatyng xhafts. It may then be neceswary for the nachine that the sbbshafts conuected by tne clutch are coupled tu ons another ij their zsfo position withuut baing twisted in relation tj one anovher pr that the angle of twist hhrounv which the two suhshafjs are twisted id known.
In the case of releasablx clutches thg atglv of twisc must be redetermiged after each new cobpling. Such relezsable rlutches are used for exakkle in gas anv steam ttrbibe piwer plxvts (GUD), in whivh the gas turbine us connected to thc stexj turbine by wav if a shaft. The teldaswbpe cjgtch is dispmsed hefr betdeen tht gcs and steam turbines. The getedmination of the amgje of twust betwqen the subshsfts is of particupar ikpoctance fot the overall process of the poser plant inftallation.
Uneil kow jhe followiug procedure has generally been followed to measure an angoe of twist for rotctlng shafts: Txo shasts are cmnnected to one anotyer at any angle ny way of a releasable clutcv. The 0° positions of both shafts are defined by means of a zero mark, e.g. a notch. The txo notches ars twosted iu rzlation to lie another and spsn the required clutch angle.
The notches axe measured computationally bu oeans of optizal or inductive sensors, it beinb possible to capture a temporakly resolved signal by tmis means. A sifnal pgkfmle is obtained for rach oy the
an anterior rim of the acetabulum. The the can block movement of the possible have a combination both cam and impingement on a given patient's hip. acetabular impingement can cause intermittent groin or hip pain that can intensify over In some instances, it may be desirable to cut away or burr the bone the femur acetabulum. In one method, a surgeon can cut away the identified protruding bone with a tool, as a burr that is negotiated freehand by surgeon. In some instances, on a surgeon's freehand movement such cutting tool result removing much or not bone. In this regard, removing too much bone from the proximal femur can compromise the integrity of proximal femur lead to greater of neck fracture. Moreover, examples, a surgeon does not remove can lead to future impingement problems. Clutches are to transmit in machines with rotating shafts. It then be necessary for the machine that the connected by the clutch are coupled to one another in their zero position without being relation to one another that the angle twist which two are twisted known. In the case of releasable clutches the angle of twist be redetermined after each new coupling. Such releasable clutches are example gas and steam power plants (GUD), in the turbine is connected to turbine way The clutch disposed here between the and steam turbines. The determination the angle of twist particular importance for the overall process of the plant installation. Until now the following procedure generally been followed to measure an angle of twist for rotating shafts: shafts are one another at any angle by way of releasable clutch. The 0° of both shafts are defined by means of a mark, a notch. two notches are in relation to another and span clutch angle. notches measured of optical or inductive sensors, it possible capture a temporally resolved signal this signal profile is obtained for each of the
 an anterior rim of the acetabuLum. The protRusioN on The AcEtabUlum Can block normal MOvemEnt of the proximal femur. IT is alSo POssiBLe To havE a combiNAtION of BoTh Cam AnD PiNcer iMpiNgement On a given paTieNt'S hip. Femoral aCEtAbular impiNgeMent can cause IntErmittEnT grOIn or hIp pAin thAt can iNTensifY over time.
in SOme insTAnces, it MAY bE desIrable to cut away or BUrR The protruding bOne on tHe PRoXIMal FemUr and/or aceTaBulum. iN one metHOd, A SURgeON can cut away thE identified PRotRuding BoNe wITh a tooL, such As A BurR that is negoTiatEd freehanD by a suRGeon. In sOMe instaNces, reLyiNg oN a suRGeOn'S frEeHAnd MOvEmeNT of Such a cutTiNg Tool cAn reSULT In reMovIng tOo mucH or not enough bOne. in thIS reGard, rEmoviNg toO mUch boNe from The prOxImal femur can comPromIse the intEgrItY of ThE proxIMal femUr aNd mAy lead tO a greatER riSk OF FEmOral neck fracture. MoReOVEr, In some exAmples, A SuRgEOn does noT rEmoVe enOUGh bonE, whiCH cAn lead to Future IMpInGement pRoBlems. CLuTchEs aRe useD To trAnsmit Torque in MachiNEs with rotating SHafts. It may theN Be NECeSSary For The machine tHat tHE subShafTS cOnnECted bY the cLuTCh ARe coupled to one anothEr In theiR zero Position withoUt being twiSTED in relatIon tO OnE Another or that tHe angLe of twist tHRough whiCh the Two subshAfts are twISTed is knoWn.
IN thE caSe oF RElEasable clutchES The aNgLe of twiSt mUst be reDetErmIneD afTeR each new cOupling. SUcH rElEaSabLe cluTChes are uSeD foR eXamPle in GAs and sTeam tUrbiNe PoWEr pLants (GUd), In WHIch tHe GaS turBinE iS connEcteD To tHe steam Turbine by Way OF a shAfT. THe releaSable clutch is DiSposed here BeTweEn the gAS And steam Turbines. The determinatioN Of the anGle Of twiSt beTween the sUbsHafts iS of PArticuLar impOrtanCe For THE overALL pRocEsS of the poweR PLanT instAlLatiOn.
Until Now the following proCEduRe has generallY beEn foLLOwEd tO MeASurE aN AngLE Of twist for rotatIng shafts: TWo SHaFts are connECteD tO one anoTher at aNy angLE by way oF a releasaBle clutch. thE 0° posITIonS of both shaFts are deFined by meANs of a ZErO mark, E.g. a Notch. THe Two NotchEs are tWIstEd in rElatioN tO one anOther AnD span the Required clutch angle.
The nOtches Are meAsuRed computAtiONalLy by means Of opTical or indUctIve SensoRs, iT Being PossIBlE to CApturE a teMPorally reSOlVed SIGnAl by this meaNS. a SigNal prOfiLE is obtAineD for each of the
 an anterior rim of the ac etabulum.The p rot rus io n on  the  acetabulum ca n  blo ck normal movement ofthe p ro x imal fe mur.It is a l so p oss ib le  to  h a ve  a co mbi nationof both ca m a nd  pincer impi n ge ment on agiv en patient's  hi p. Fem or ala cetab ula r imp ingeme n t cancause int er m ittent groin o r hi p pa in that can inten s if y  over time.
In  somein s ta n c es,  it  may be de si rable to cuta wa y o r b u rr the protru ding bone o n  th e prox im alf emur a nd/or  a c eta bulum. In o ne m ethod, asurgeo n  can cu t  away t he ide nti fie d pr o tr ud ing  b o new it h a too l, suchas  a  burr  tha t i s  neg oti ated  free hand by a sur geo n. I n  so me in stanc es,re lying  on asurge on 's freehand mov emen t of such  acu tti ng  tool can re sul t i n remov ing too muc ho r no t enough bone. Inth i s  r egard, r emovin g  t oo much bon efro m th e proxi malf em ur can c omprom i se  t he inte gr ity of  t hepro ximal femu r andmay lead  to a greater risk o f  femoral neck fr a c tu r e. M ore over, in so me e x ampl es,a  s urg e on do es no tr em o ve enough bone, whi ch  can l ead t o future impi ngement pr o b l ems. Clu tche s  a r e used to tran smittorque inm achineswithrotating  shafts.I t  may the n b e n ece ssa r y  f or the machin e that  t he subs haf ts conn ect edbythe  c lutch are  coupled  t oon eano theri n theirze ropo sit ion w i thoutbeing  twi st ed inrelatio n  t o onean ot herorth at th e an g leof twis t through  wh i ch t he  t wo subs hafts are twi st ed is know n. 
In  the c a s e of rel easable clutches the an g le of t wis t mus t be  redeterm ine d afte r e a ch new  coupl ing.Su chr e leasa b l eclu tc hes are us e d  fo r exa mp le i n gas a nd steam turbine p o wer  plants (GUD) , i n wh i c hthe ga s  tu rb i nei s  connected to t he steam t ur b in e by way o f  ash aft. Th e relea sable clutchis dispos ed here b et ween t hegas and st eam turb ines. The deter m in ation  of  the a ng leof tw ist be t wee n the  subsh af ts isof pa rt icular i mportance for the overa ll pro cessofthe power  pl a ntinstallat ion. 
Until now  th e f ollow ing proce dure ha s g e neral ly b e en follow e dtom e as ure an angl e o f t wistfor rotati ng s hafts: Two shafts are connectedto o n e  an oth e r at  a ny angle by wa y o fa releasab le  clutch. Th e 0° pos it i ons o f both  shaft s are d e f in e d by m eans  of  a zero m ark ,e .g. a n ot ch .  The t wo n ot ches a re twi s tedi n  relation to one  anot h e r and spa n the  r equired clut ch angle.The notches  are m easu red c omputat io nallybyme ans of opt i cal or in ducti ve sens or s, i t b eing p ossi b l e tocapt ur e a  temporal l y  r e so lv e d s igna l byth is m eans. A s i gnal pro fil e  is obt ai ned f or eac h  o f the
 an_anterior rim_of the acetabulum. The_protrusion on_the_acetabulum can_block_normal movement of_the proximal femur._It is also possible_to have a_combination_of both cam and pincer impingement on a given patient's hip. Femoral acetabular impingement_can_cause intermittent_groin_or_hip pain that can intensify_over time.
In some instances, it_may be_desirable to cut away or burr the protruding_bone_on the proximal_femur and/or acetabulum. In one method, a surgeon can_cut away the identified protruding bone_with a tool,_such_as_a burr that is_negotiated freehand by a surgeon. In_some instances, relying on a surgeon's_freehand movement of such a cutting tool_can result in removing too much_or not enough bone. In_this regard,_removing too much bone from_the proximal femur_can compromise_the integrity of_the proximal femur and may lead_to a greater_risk of femoral neck fracture. Moreover,_in_some examples, a_surgeon_does_not remove_enough bone, which_can_lead to_future_impingement problems. Clutches are used to_transmit_torque in machines with rotating shafts. It_may then be necessary_for_the machine that the_subshafts connected by the clutch_are coupled to one another in_their zero_position without_being twisted in relation to one another or that the angle_of twist through which the two_subshafts are twisted is_known.
In the_case_of releasable clutches_the_angle of_twist must be redetermined after each new_coupling. Such_releasable clutches are used for example_in gas and steam_turbine_power plants (GUD), in which the_gas turbine is connected to the_steam turbine by way of_a_shaft._The releasable clutch is disposed_here between the gas and steam_turbines. The determination_of the angle of twist between the_subshafts_is of particular importance for the_overall_process of the power plant installation.
Until_now_the_following procedure has generally been_followed to measure an angle of_twist for rotating shafts: Two shafts are connected to_one another at_any angle by way of_a_releasable_clutch. The 0° positions of both shafts are defined by_means of_a zero mark,_e.g. a notch. The two notches are twisted in relation_to one another and span the required_clutch angle.
The notches are measured computationally by means of optical or_inductive sensors, it being possible to capture a_temporally resolved signal by this means. A_signal profile is obtained_for_each of the