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8/14/2019 Gyroscope - NHQ
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Cm bin con quay hichuyn (Gyroscope)Nguyn Hng QunLp VP04CT
8/14/2019 Gyroscope - NHQ
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Gyroscope l g
Gyroscope l mt thit bdng o hoc duy tr snh hng
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C th gp Gyroscope u?
Hng khng: Inertial guidance system (Xemthm:http://www.absoluteastronomy.com/topics/Inertial_guidance_sy
) My t ng: Cm bin vn tc gc(Xem thm:
http://auto.howstuffworks.com/28000-traction-control-explained.)
Gii tr / tiu dng:Cm bin hin thc o(http://archives.sensorsmag.com/articles/0802/14/main.shtml ),pointing device
T ng ho trong cng nghip: iu khin
chuyn ng, robotics
http://www.absoluteastronomy.com/topics/Inertial_guidance_systemhttp://auto.howstuffworks.com/28000-traction-control-explained.htmhttp://archives.sensorsmag.com/articles/0802/14/main.shtmlhttp://auto.howstuffworks.com/28000-traction-control-explained.htmhttp://www.absoluteastronomy.com/topics/Inertial_guidance_system8/14/2019 Gyroscope - NHQ
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Nguyn l hot ng
Cu to n gin gm bnh (aqun tnh) quay vi tc cao gn
lng ln khung . Khi khung ngoi quay,
n tc ng momentngoi lc vo a, lma chu thm chuynng quay theophng vung gcvi phng quay cakhung (tu sai)
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Nguyn l hot ng
Khi a xoay vi vn tc rt cao, s chuynhng theo moment ngoi lc c gim
thiu (do hu ht b chuyn sang phngvung gc) gip gyroscope hu nh duy trc nghing ca n.
Hin tng m s quay theo trc ny c
chuyn thnh s quay theo trc kia cdng gim st nghing (trong mybay)
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7/26Nguyn l hot ng
8/14/2019 Gyroscope - NHQ
8/26Cm bin Gyroscope
Cng nh gyroscope, cm bin gyroscopecng li dng hin tng mt vt ang xoay
trn bin chuyn ng theo mt phngthnh chuyn ng theo phng khc vunggc.
Cc loi cm bin Gyroscope:
Spinning Mass Gyro (loi Gyroscope ni trn) Vibrating Gyroscope (MEMS Gyroscope) Optical Gyroscope
8/14/2019 Gyroscope - NHQ
9/26Vibrating Gyroscope
Cm bin MEMS gyroscope: o vn tc xoayca vt, vi chuyn ng input v output l
chuyn ng tnh tin (thng l dao ng) Cm bin MEMS gyroscope da trn hiung Coriolis.
8/14/2019 Gyroscope - NHQ
10/26Hiu ng Coriolis
Hiu ng Coriolis l hiu ng xyra trong cc h qui chiu quay so
vi cc h quy chiu qun tnh. Nc th hin qua hin tng lchqu o ca nhng vt chuynng trong h qui chiu ny.
8/14/2019 Gyroscope - NHQ
11/26Hiu ng Coriolis
S lch qu o do mt loi lc qun tnhgy ra, gi l lc Coriolis. Lc Coriolis c
xc nh bng cng thc sau:Vn tc ca vtVn tc xoay
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12/26Cu to chung
Cc cm bin gyroscopes dng mt khi proof
mass dao ng theo mtphng c gi lphng s cp.
Khi ny ng thib quay quanh mt trc,lm xut hin lc Corioliskhin n c thm dao ng theophng khc, gi l phng thcp.
8/14/2019 Gyroscope - NHQ
13/26Vibrating Gyroscope
Trn phng chuyn ng th cp ny cgn bn cc t in nhn bit s thay i
in dung gy bi chuyn ng ny, v t l vn tc xoay.
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14/26Vibrating Gyroscope
o chuyn ng th cp:
8/14/2019 Gyroscope - NHQ
15/26MEMS Vibrating Gyroscope
8/14/2019 Gyroscope - NHQ
16/26Vibrating Ring Gyroscope
8/14/2019 Gyroscope - NHQ
17/26Vibrating Ring Gyroscope
8/14/2019 Gyroscope - NHQ
18/26Vibrating Bar Gyroscope
8/14/2019 Gyroscope - NHQ
19/26Laser gyroscope
Laser gyroscope s dng s giao thoa nhsng laser bn trong mt vnh quang hc nhn bit thay i v phng hng v sxoay, ng dng hiu ng Sagnac.
H thng gm 2 tia laser c pht t cngmt ngun, i ngc chiu nhau theo mt
ng ng dn khp kn (nh cc gnghay si quang), trn mt nn xoay. Trnng tr v ngun pht, chng c chothot ra khi thit b theo cch sao cho c
th to ra giao thoa.
8/14/2019 Gyroscope - NHQ
20/26Laser gyroscope
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21/26Laser gyroscope
Khi nn xoay, v tr ngun pht cng nh vtr ch n thay i trong sut thi giantruyn ca laser, do , mt tia s c hnhtrnh ngn i cn tia kia phi i di hn, ktqu l h giao thoa b dch chuyn t dch chuyn ca h giao thoa c th suyc vn tc xoay ca nn.
A enclosed areaP perimeter (beam path length) optical wavelength
n normal vector to A rotation vector
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22/26Laser gyroscope
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23/26Laser gyroscope
u im: Khng c b phn chuyn ng Khng c
ma st Chnh xc hn cm bin c kh. Nh gn, vng chc. Khng c xu hng chng li s thay i v
hng nh cm bin c kh. Nhc im:
B hiu ng lock-in vn tc xoay nh,mt i tnh chnh xc. Khc phc: to rungng tn s cao (dither, mt dng nhiu,dng lm ngu nhin nhng sai s lngt, c dng nhiu trong x l tn hiu s)
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Thank you for your attention!
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