Airborne fiber optic inertial navigation solution

Dongosolo lolondola kwambiri la navigation ndiye chida chofunikira kwambiri pakuwongolera kayendetsedwe ka ndege ndikuwukira kolondola kwa zida zake.Ndi chitukuko cha teknoloji ya strapdown inertial ndi optical gyro, strapdown yakhala ikugwiritsidwa ntchito kwambiri m'munda wa ndege ndi ubwino wake wodalirika kwambiri, kuwala ndi kakang'ono, kugwiritsa ntchito mphamvu zochepa komanso mtengo wotsika.^[1-4].Pakali pano, airborne strapdown navigation system ndi kuphatikiza kwa laser gyro strapdown navigation system ndi fiber optic gyro strapdown navigation system. Pakati pawo, Northrop Grumman's LN-100G, Honeywell's H-764G laser gyro strapdown navigation system ndi Northrop fiber Grum2'1s LNrum2 optic gyro strapdown navigation system yakhala ikugwiritsidwa ntchito kwambiri mu zombo zankhondo zaku America^[1].Northrop Grumman Company inapanga LN-251 navigation system ya helicopters yokhala ndi chizindikiro chofunika kwambiri cha high precision fiber optic gyro, kenako inapanga LN-260 kuti igwirizane ndi kayendedwe ka ndege. LN-260 inasankhidwa ndi US Air Force kwa Avionics kukweza kwa F-16 multinational fighter fleet. Asanatumizidwe, makina a LN-260 anayesedwa kuti akwaniritse malo olondola a 0.49n mile (CEP), cholakwika cha kumpoto kwa 1.86ft / s (RMS), ndi Kulakwitsa kwa liwiro lakum'maŵa kwa 2.43ft/s (RMS) m'malo osinthika kwambiri.Chotero, makina oyendetsa ndege opangidwa ndi optical strapdown inertial navigation amatha kukwaniritsa zofunikira zogwirira ntchito za ndegeyo poyendetsa ndi kuwongolera luso.^[1].

Poyerekeza ndi laser gyro strapdown navigation system, fiber optic gyro strapdown navigation system ili ndi zabwino izi: 1) sichifuna jitter yamakina, imathandizira kamangidwe kake komanso zovuta zamapangidwe ochepetsa kugwedezeka, imachepetsa kulemera ndi kugwiritsa ntchito mphamvu, ndikuwongolera kudalirika kwa navigation system;2) Kuchulukitsidwa kolondola kwa fiber optic gyro kumakwirira mulingo waukadaulo mpaka mulingo woyenera, ndipo njira yake yoyendera yofananira imathanso kupanga mawonekedwe ofananirako a navigation system, kuphimba chilichonse kuyambira pamalingaliro mpaka pamayendedwe aatali- ndege yopirira;3) Kuchuluka kwa fiber optic gyroscope mwachindunji kumadalira kukula kwa mphete ya fiber.Ndi kugwiritsa ntchito bwino kwa fiber m'mimba mwake, kuchuluka kwa fiber optic gyroscope yolondola komweko kukucheperachepera, ndipo kukula kwa kuwala ndi miniaturization ndi njira yosapeŵeka.

Pulogalamu yapadziko lonse

Airborne fiber optic gyro strapdown navigation system imaganizira bwino za kutentha kwa dongosolo ndi kupatukana kwazithunzi, ndikutengera dongosolo la "three-cavity"^[6,7], kuphatikiza paboti la IMU, pabowo lamagetsi ndi mphamvu yachiwiri.Mphuno ya IMU imakhala ndi mawonekedwe a thupi la IMU, mphete ya kuwala kwa fiber ndi quartz flexible accelerometer (quartz plus mita); Pakhomo lamagetsi lili ndi bokosi la gyro photoelectric, meter conversion board, navigation computer and interface board, ndi kalozera waukhondo. bolodi; Pabowo lachiwiri lamphamvu lili ndi gawo lachiwiri lamphamvu, fyuluta ya EMI, capacitor yotulutsa magetsi. Bokosi la gyro photoelectric ndi mphete ya kuwala mu IMU cavity pamodzi zimapanga gawo la gyro, ndi quartz flexible accelerometer ndi mbale yotembenuza mita. pamodzi kupanga accelerometer chigawo chimodzi^[8].

Chiwembu chonsecho chikugogomezera kulekanitsa kwa zigawo za photoelectric ndi mapangidwe amtundu wa chigawo chilichonse, ndi mapangidwe apadera a optical system ndi dera lozungulira kuti atsimikizire kutentha kwa kutentha ndi kuponderezedwa kwa kusokoneza kwa mtanda. mankhwala, zolumikizira zimagwiritsidwa ntchito kulumikiza matabwa ozungulira mu chipinda chamagetsi, ndipo mphete ya optical fiber ndi accelerometer mu chipinda cha IMU zimasinthidwa motsatira.Pambuyo popanga IMU, msonkhano wonse umachitika.

 Bokosi loyang'anira pabowo lamagetsi ndi bokosi la gyro photoelectric kuchokera pamwamba mpaka pansi, kuphatikiza gwero la kuwala kwa gyro, chojambulira ndi gawo lotulutsa lakutsogolo; Gulu lotembenuza tebulo limamaliza kutembenuka kwa siginecha ya accelerometer yamakono kukhala chizindikiro cha digito; Njira yothetsera vutoli ndi Mawonekedwe a mawonekedwe amaphatikiza mawonekedwe a board ndi navigation solution board, bolodi yolumikizirana makamaka imamaliza kuphatikizika kwa data yamitundu yambiri yamagetsi, kulumikizana kwamagetsi ndi kuyankhulana kwakunja, bolodi yoyeserera panyanja makamaka imamaliza kuyendetsa bwino kwa inertial ndi njira yophatikizira yoyenda; Gulu lowongolera limamaliza kwambiri satellite navigation, ndikutumiza chidziwitso ku bolodi loyendetsa njira ndi bolodi lowonetserako kuti mutsirize kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake.

Ukadaulo wofunikira

1. Integrated design scheme

Airborne fiber optic gyro navigation system imazindikira kuti ndegeyo ili ndi magawo asanu ndi limodzi akuyenda kwaufulu mwa kuphatikizika kwa masensa angapo.Three axis gyro ndi atatu axis accelerometer amatha kuganiziridwa kuti apange kuphatikiza kwakukulu, kuchepetsa kugwiritsa ntchito mphamvu, voliyumu ndi kulemera.Kwa fiber optic. gawo la gyro, limatha kugawana nawo gwero lowunikira kuti likwaniritse kapangidwe kaphatikizidwe ka ma axis atatu; Pa gawo la accelerometer, quartz flexible accelerometer imagwiritsidwa ntchito, ndipo gawo lotembenuzidwa lingangopangidwa m'njira zitatu. Pali vuto la nthawi. kulunzanitsa mu multi-sensor deta kupeza deta.Kuti mukhale ndi malingaliro apamwamba kwambiri, kusasinthasintha kwa nthawi kumatha kutsimikizira kulondola kwakusintha kwamalingaliro.

2. Mapangidwe olekanitsa zithunzi

Fiber optic gyro ndi fiber optic sensa yochokera ku Sagnac zotsatira kuti ayese mlingo wa angular. Pakati pawo, mphete ya fiber ndi chigawo chachikulu cha liwiro la angular la fiber gyroscope.Imavula ndi mamita mazana angapo kufika mamita zikwi zingapo za fiber.Ngati munda wa kutentha kwa mphete ya kuwala umasintha, kutentha pa mfundo iliyonse ya mphete ya kuwala kumasintha ndi nthawi, ndipo matabwa awiri a kuwala kwa mafunde amadutsa pa mfundoyo. pa nthawi zosiyana (kupatulapo pakati pa coil ya optical fiber), amakumana ndi njira zosiyana za kuwala, zomwe zimapangitsa kuti pakhale kusiyana kwa gawo, kusuntha kwa gawoli kosasinthika sikudziwika ndi kusintha kwa gawo la Sagneke chifukwa cha kusinthasintha. Kuchita kwa fiber optic gyroscope, gawo lalikulu la gyroscope, mphete ya ulusi, iyenera kusungidwa kutali ndi gwero la kutentha.

Kwa gyroscope yophatikizika ya Photoelectric, zida zamagetsi zamagetsi ndi ma board ozungulira a gyroscope ali pafupi ndi mphete ya kuwala kwa fiber.Pamene sensa ikugwira ntchito, kutentha kwa chipangizocho kudzakwera pang'onopang'ono, ndikukhudza mphete ya kuwala kwa fiber kudzera mu radiation ndi conduction. gyroscope ya optical fiber, kuphatikizapo mawonekedwe a njira ndi mawonekedwe ozungulira, mitundu iwiri ya mapangidwe odzipatula, pakati pa fiber ndi waveguide line connection.

3. Mphamvu yodziwonetsera yokha

Fiber optic gyro strapdown navigation system imayenera kukhala ndi magetsi odziyesera okha pa chipangizo chopanda mphamvu. Chifukwa makina oyendetsa amatengera kuyika kwachingwe kopanda makina osinthira, kudziyesa pawokha kwa zida zopanda mphamvu kumamalizidwa ndi kuyeza kokhazikika m'magawo awiri, omwe ndi , kudziyesa pamlingo wa chipangizo ndi kudziyesa kwadongosolo, popanda kusangalatsa kwakunja.

Malingaliro a kampani ERDI TECH LTD