Seite - 333 - in Emerging Technologies for Electric and Hybrid Vehicles

Energies 2017,10, 315 (a) (b) Figure11.Simulationresultsshowingthemagneticfluxdensity for the loadcoil (a)with thesensor coilunitand(b)without thesensorcoilunit. Theoutputvoltagewaveformsgeneratedfromthesensorcoilwhenit ismisalignedto the left or rightsideareshowninFigure12. Theresults showthat theresultingvoltage for the left sideand rightsidemaintainsa90degreephasedifference, thusvalidatingthe theoryshowninFigure9,and clearlydistinguishingthe left/rightsideregionsregardlessofposition. It canalsobeobservedthat the relationship between the sensor coil’s inducedvoltage and lateralmisalignment is non-linear. However, this informationcanbeneglectedbecause the left/rightdirectionscanbeclearly identified by the sensor coil. With the left/right information, the exact lateralmisalignmentposition canbe identifiedbymeasuring thevoltage through the loadcoil,which is furtherprocessed in theACAS lateralpositiondetectionunit. Figure12.Simulatedsensorcoilvoltageoutputvs. time, showingthe left sideandrightsidepositions canbeclearly identified. 3.2.ACASLateralPositionDetectionUnit AsmentionedinSection3.1, the leftandrightsidescanbedetectedbasedonthephasedifference. TheACASlateralpositiondetectionunit is responsible forconvertingthosevalues into information thatcanbeprocessedbytheACASfuzzysteeringcontroller. Theblockdiagramof theACASlateral positiondetectionunit is showninFigure13. Figure13.BlockdiagramshowingtheACASlateralpositiondetectionunit. 333