Fa2004 16.33315-5 TUNING FORK GY Ros MEMS ∈KPL0工 Ts CORLOLIS EFFE了 HE~A6RM雌GM55s06TEB 1 RATE OF RoTATIoN升6oU7 x s∥ PLANE OF V BRATioN → RIVe VI6 RATLONS工AoE DIRECTION ROTATON oF BA5R5υLTs TN ADDITUW A MBRATIONS CAN BE VERy SMALL vM0 EPENDENT→cA6H Image removed due to copyright considerations
Image removed due to copyright considerations. Fall 2004 16.333 15–5
Fa2004 16.33315-6 opTicAL GYro s SENO LIGHT AROUND A ROTATING PATH + MEASURE THE CW-CCw TMEs Image removed due to copyright considerations SAGNAC EFFeCT AT s 4A RING LASER GYRo MEASURE FRINGE PATTERW BY IATERFERING cW/acw BEAMS 工 PUT ROTATD N cAuSEs RmER千Av鼾 舟 RATE A Image removed due to copyright considerations VERy ACcURATE INSENGITWde To ACEL STABLE SCHE FACToR VERY ExPENSIVE
Image removed due to copyright considerations. Image removed due to copyright considerations. Fall 2004 16.333 15–6
Fa2004 16.33315-7 INTERFERoMETRIC FIbKe ofnc GYRo lrFoG) ALso055 s SAGNAC EFFEc了 CoLL oF N- ToRN FI BRE Polariser Beam Splitters Lens Optical Intensity Detecto Spatial Sagnac w Filter $ Lens Fibre coil Phase shift Fringe Pattern Phase shift Proportional PHASE SI所oFcw/cwRe50LτsrA REDUCTON OF LiGHT INTENSITy AT DECTECTDR 互s-2L06 AJoIDS SoME oF THE PRECISE MAcHINING aF RLE CAN USe CHEAPER ELECTRoNICS SMALLER THAN RLG 少cePE,6 UT STILL EXPENSIVE
Fall 2004 16.333 15–7 Fibre Coil Lens Spatial Filter Laser Source Splitters Sagnac 0 � Phase Shift � Lens −� −� Fringe Pattern Detector Polariser Beam Optical Intensity Phase Shift Proportional to
工3 Fall 2004 16.33315-11 BIGGEST PRO BLEM WITH GY RoS ARETHE B1 As AND③AspR1FT BIAs CAVSED BY. DRIVE EXCITATION FEED THRDU Gu OUTPVT EuECτ RoNICS OFFSeTS BEARING ToR&ves 3 NPES FIxEd BiAs BIAS VAR ATION FROM ONE TORN-ON]To ANOTHER. THERMAL)[BAs STABILTY] BIAS DRIFT,usν4LM0EL0N升 RANDOM认ALK 6 Ew BS WI A Jued=Wlt) A G-KNo WN BITH ON ITS oF (DEG /u)E TYPicAL益ls 00D MED BAD 81般 S STABLLT lO DG/s∈c BIAs DRIFT (DEG/SEc)
Fall 2004 16.333 15–11