Maganin kewayawa na fiber optic inertial na iska

Babban madaidaicin tsarin kewayawa shine ainihin kayan aikin sarrafa zirga-zirgar jirgin sama da madaidaicin harin tsarin makaman sa.Shirye-shiryensa na yau da kullun sun haɗa da tsarin dandamali da tsarin madaidaicin madauri.Tare da haɓaka fasahar inertial strapdown da gyro na gani, an yi amfani da madauri sosai a cikin filin iska tare da fa'idodin aminci mai girma, haske da ƙananan girman, ƙarancin wutar lantarki da ƙarancin farashi.^[1-4].A halin yanzu, tsarin kewayawa na iska shine haɗuwa da tsarin kewayawa na Laser gyro strapdown navigation tsarin da kuma fiber optic gyro strapdown navigation tsarin. Daga cikin su, Northrop Grumman's LN-100G, Honeywell's H-764G Laser gyro strapdown kewayawa tsarin da kuma fiber optic gyro navigation tsarin. An yi amfani da tsarin kewayawa na gani gyro strapdown a cikin jiragen saman yakin Amurka^[1]Kamfanin .Northrop Grumman ya ƙaddamar da tsarin kewayawa na LN-251 don helikofta tare da muhimmiyar alamar babban fiber optic gyro, sa'an nan kuma ya ƙera LN-260 don daidaitawa da kewayawa jirgin sama. LN-260 ya zaba ta hanyar Amurka Air Force don avionics hažaka na F-16 multinational fighter rundunar F-16. Kafin turawa, an gwada tsarin LN-260 don cimma daidaiton matsayi na 0.49n mil (CEP), kuskuren gudu daga arewa na 1.86ft/s (RMS), da kuma Kuskuren saurin gabas na 2.43ft / s (RMS) a cikin yanayi mai ƙarfi sosai.Saboda haka, tsarin kewayawa na gani inertial kewayawa na iya cika cikakkiyar buƙatun aiki na jirgin sama dangane da kewayawa da ikon jagoranci.^[1].

Idan aka kwatanta da Laser gyro strapdown kewayawa tsarin, fiber na gani gyro strapdown kewayawa tsarin yana da wadannan abũbuwan amfãni: 1) shi ba ya bukatar inji jitter, sauƙaƙa da tsarin tsarin da kuma hadaddun na vibration rage zane, rage nauyi da ikon amfani, da kuma inganta da amincin tsarin kewayawa; 2) Madaidaicin bakan fiber optic gyro yana rufe matakin dabara zuwa matakin dabarun, kuma tsarin kewayawa na iya samar da bakan tsarin kewayawa daidai, yana rufe komai daga tsarin hali zuwa tsarin kewayawa na dogon zango - jirgin sama mai jurewa;3) Girman gyroscope na fiber optic kai tsaye ya dogara da girman zoben fiber.Tare da balagagge aikace-aikace na lafiya diamita fiber gyroscope ƙarar fiber optic gyroscope tare da wannan daidaito yana kara karami da karami, da kuma ci gaban haske da miniaturization wani makawa Trend.

Gabaɗaya tsarin ƙira

Tsarin kewayawa na fiber optic gyro strapdown na iska yana yin la'akari da tsarin watsar da zafi da kuma rabuwar hoto, kuma ya ɗauki tsarin "cavity-uku"^[6,7], ciki har da rami na IMU, kogon lantarki da kogon wutar lantarki na biyu.Kogon IMU ya ƙunshi tsarin jikin IMU, zoben gano fiber na gani da ma'adini mai sauƙi mai sauri (quartz da mita); Kogon lantarki ya ƙunshi akwatin hoto na gyro, allon juyawa mita, kwamfutar kewayawa da allon dubawa, da jagorar tsafta. Board;Kogon wutar lantarki na biyu ya ƙunshi kunshin wutar lantarki na sakandare, EMI tace, capacitor cajin caji. Akwatin photoelectric na gyro da zoben fiber na gani a cikin rami na IMU tare sun ƙunshi ɓangaren gyro, da ma'adini mai sauƙi na accelerometer da farantin juyawa na mita. tare sun zama bangaren accelerometer^[8].

Tsarin gabaɗaya yana jaddada rarrabuwa na kayan aikin photoelectric da ƙirar na yau da kullun na kowane ɓangaren, da kuma keɓantaccen tsari na tsarin gani da tsarin kewayawa don tabbatar da ɓarkewar zafi gabaɗaya da kuma hana tsangwama na giciye.Don inganta haɓakar debuggability da fasahar haɗuwa na samfurin, ana amfani da masu haɗawa don haɗa allunan kewayawa a cikin ɗakin lantarki, kuma zoben fiber na gani da kuma accelerometer a cikin ɗakin IMU ana lalata su bi da bi.Bayan kafa IMU, ana gudanar da taron duka.

 Kwamitin kewayawa a cikin rami na lantarki shine akwatin gyro photoelectric daga sama zuwa ƙasa, gami da tushen hasken gyro, mai ganowa da da'irar fitarwa na gaba; Kwamitin juyawa na tebur galibi yana kammala jujjuya siginar accelerometer na yanzu zuwa siginar dijital; Maganin kewayawa da dubawa da'ira ya hada da dubawa jirgin da kewayawa bayani jirgin, dubawa jirgin yafi kammala synchronous saye na Multi-tashar inertial na'urar data, wutar lantarki hulda da waje sadarwa, kewayawa bayani jirgin yafi kammala tsarki inertial kewayawa da hadedde kewayawa bayani; The jagora hukumar yafi kammala da tauraron dan adam kewayawa, kuma ya aika da bayanin zuwa allon bayani na kewayawa da allon dubawa don kammala haɗin haɗin gwiwar.

Mabuɗin fasaha

1. Tsarin ƙira mai haɗaka

Tsarin kewayawa na fiber optic gyro na iska yana gane matakan shida na jirgin sama na gano motsi na 'yanci ta hanyar haɗakar da na'urori masu aunawa. gyro bangaren, zai iya raba tushen hasken don aiwatar da tsarin haɗin kai na axis guda uku; Don bangaren accelerometer, ma'aunin accelerometer mai sassaucin ma'adini ana amfani da shi gabaɗaya, kuma za'a iya tsara yanayin juyawa ta hanyoyi uku kawai. Akwai kuma matsalar lokaci. aiki tare a cikin sayan bayanan firikwensin da yawa.Don haɓakar ɗabi'a mai ƙarfi mai ƙarfi, daidaiton lokaci na iya tabbatar da daidaiton sabunta ɗabi'a.

2. Photoelectric rabuwa zane

Gyro na fiber optic shine firikwensin fiber optic dangane da tasirin Sagnac don auna ƙimar angular. Daga cikin su, zoben fiber shine maɓalli mai mahimmancin saurin angular na fiber gyroscope.An raunata ta mita ɗari da yawa zuwa mita dubu da yawa na fiber. Idan filin zafin jiki na zoben fiber na gani ya canza, yanayin zafi a kowane wuri na zoben fiber na gani yana canzawa tare da lokaci, kuma ƙullun biyu na igiyoyin hasken wuta suna wucewa ta wurin. a lokuta daban-daban (sai dai tsakiyar tsakiyar fiber na fiber na gani), suna fuskantar hanyoyi daban-daban na gani, wanda ya haifar da bambance-bambancen lokaci, wannan canjin lokaci maras dacewa ba shi da bambanci daga yanayin Sagneke wanda ya haifar da juyawa.Domin inganta yanayin zafi. aikin gyroscope na fiber optic, ainihin ɓangaren gyroscope, zoben fiber, yana buƙatar kiyaye shi daga tushen zafi.

Don gyroscope hadedde na hoto, na'urorin lantarki da allon kewayawa na gyroscope suna kusa da zoben fiber na gani.Lokacin da firikwensin yana aiki, zafin jiki na na'urar kanta zai tashi zuwa wani matsayi, kuma yana shafar zoben fiber na gani ta hanyar radiation da gudanarwa.Don magance tasirin zafin jiki akan zoben fiber na gani, tsarin yana amfani da rabuwar photoelectric. gyroscope na gani na fiber na gani, gami da tsarin hanyar gani da tsarin kewayawa, nau'ikan nau'ikan nau'ikan tsari guda biyu masu zaman kansu, tsakanin fiber da haɗin layin waveguide.Ka guji zafi daga akwatin tushen hasken da ke shafar tasirin zafi na fiber.

3. Ƙimar ikon ganowa da kai

Fiber optic gyro strapdown navigation tsarin yana buƙatar samun aikin gwajin kansa na lantarki akan na'urar inertial.Saboda tsarin kewayawa yana ɗaukar tsattsauran madauri mai tsafta ba tare da tsarin jujjuyawa ba, gwajin kansa na na'urorin da ba su da ƙarfi ana kammala su ta hanyar ma'auni a sassa biyu, wato. , Gwajin kai-matakin na'urar da gwajin kai-tsari, ba tare da tashin hankali na waje ba.

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