Airborne fiber optic inertial navigation solution

Sistimi ea ho sesa e nepahetseng haholo ke sesebelisoa sa mantlha sa taolo ea sefofane le tlhaselo e nepahetseng ea sesebelisoa sa eona sa libetsa.Merero ea eona e ka sehloohong e kenyelletsa merero ea sethaleng le merero ea strapdown.Ka nts'etsopele ea theknoloji ea strapdown inertial le optical gyro, strapdown e 'nile ea sebelisoa haholo tšimong ea sefofane le melemo ea eona ea ho tšepahala ho phahameng, ho khanya le ho nyenyane, tšebeliso e tlaase ea matla le theko e tlaase.^[1-4].Hona joale, airborne strapdown navigation system ke motsoako oa laser gyro strapdown navigation system le fiber optic gyro strapdown navigation system. Har'a tsona, Northrop Grumman's LN-100G, Honeywell's H-764G laser gyro strapdown navigation system le Northsrop fiber Grum2'1 LNrum2 Optic gyro strapdown navigation system e sebelisitsoe haholo likepeng tsa lifofane tsa ntoa tsa Amerika^[1].Northrop Grumman Company e ntlafalitse mokhoa oa ho tsamaea oa LN-251 bakeng sa helikopthara e nang le letšoao la bohlokoa la ho nepahala ha fiber optic gyro e phahameng, 'me e ntan'o hlahisa LN-260 ho ikamahanya le ho tsamaea ha lifofane.LN-260 e ile ea khethoa ke US Air Force bakeng sa ntlafatso ea lifofane tsa lifofane tsa lifofane tsa ntoa tsa machaba tsa F-16. Pele e romelloa, tsamaiso ea LN-260 e ile ea lekoa ho finyella boemo bo nepahetseng ba 0.49n mile (CEP), phoso ea lebelo la leboea la 1.86ft / s (RMS), le Phoso ea lebelo la bochabela la 2.43ft/s (RMS) sebakeng se matla haholo.Ka lebaka leo, tsamaiso ea optical strapdown inertial navigation e ka finyella ka botlalo litlhoko tsa ts'ebetso ea sefofane mabapi le bokhoni ba ho tsamaea le tataiso.^[1].

Ha ho bapisoa le laser gyro strapdown navigation system, fiber optic gyro strapdown navigation system e na le melemo e latelang: 1) ha e hloke jitter ea mochini, e nolofatsa sebopeho sa sistimi le ho rarahana ha moralo oa phokotso ea vibrate, e fokotsa boima ba 'mele le tšebeliso ea matla,' me e ntlafatsa ts'epahalo ea sistimi ea ho sesa; 2) Phapang e nepahetseng ea fiber optic gyro e akaretsa boemo ba maqheka ho isa boemong ba leano, 'me sistimi ea eona e tsamaisanang le eona e ka theha mokhoa o ts'oanang oa tsamaiso ea ho tsamaea, o koahelang ntho e ngoe le e ngoe ho tloha tsamaisong ea maikutlo ho ea ho sistimi ea ho tsamaea bakeng sa nako e telele. Endurance aircraft;3) Bophahamo ba fiber optic gyroscope ka kotloloho bo ipapisitse le boholo ba selikalikoe sa fiber.Ka ts'ebeliso e butsoitseng ea fiber ea bophara bo botle, bophahamo ba fiber optic gyroscope ka nepo e ts'oanang bo ntse bo fokotseha, 'me nts'etsopele ea khanya le miniaturization ke mokhoa o ke keng oa qojoa.

Kakaretso ea moralo oa moralo

Airborne fiber optic gyro strapdown navigation system e nka ka botlalo mocheso oa sistimi le karohano ea motlakase, 'me e amohela leano la "three-cavity"^[6,7], ho kenyeletsoa cavity ea IMU, cavity ea elektronike le sebaka sa bobeli sa matla.Mokotla oa IMU o na le sebopeho sa 'mele oa IMU, selikalikoe sa optical fiber sensing le quartz flexible accelerometer (quartz plus meter); Mohatla oa elektroniki o na le lebokose la gyro photoelectric, meter conversion board, navigation computer le interface board, le tataiso ea likhoerekhoere. Boto; Lekhalo la bobeli la matla le na le mojule oa motlakase o kentsoeng, EMI filter, charge-discharge capacitor. Lebokose la gyro photoelectric le lesale la fiber optical ka har'a IMU cavity hammoho li etsa karolo ea gyro, le quartz flexible accelerometer le meter conversion plate. hammoho li etsa karolo ea accelerometer^[8].

Morero oa kakaretso o hatisa ho arohana ha likarolo tsa photoelectric le moralo oa modular oa karolo e 'ngoe le e' ngoe, le moralo o arohaneng oa tsamaiso ea optical le tsamaiso ea potoloho ho etsa bonnete ba hore mocheso oohle oa mocheso le ho thibela ho kena-kenana le sefapano. sehlahisoa, li-connectors li sebelisetsoa ho hokahanya mapolanka a potoloho ka kamoreng ea elektronike, 'me lesale la optical fiber le accelerometer ka kamoreng ea IMU li senyeha ka ho latellana.Ka mor'a ho theha IMU, kopano eohle e etsoa.

 Boto ea potoloho sebakeng sa elektroniki ke lebokose la gyro photoelectric ho tloha holimo ho ea tlase, ho kenyeletsoa mohloli oa leseli la gyro, detector le potoloho e ka pele ea ho tsoa; Boto ea phetolo ea tafole e phethela haholo phetoho ea lets'oao la accelerometer ho lets'oao la dijithale; Tharollo ea ho tsamaisa le Sebopeho sa sehokelo se kenyelletsa boto ea li-interface le boto ea tharollo ea navigation, boto ea li-interface haholo-holo e phethela ka mokhoa o ts'oanang ho fumaneha ha data ea lisebelisoa tse ngata tsa li-inertial, tšebelisano ea phepelo ea motlakase le puisano ea kantle, boto ea tharollo ea navigation haholo-holo e phethela ho sesa ho sa sebetseng hantle le tharollo e kopaneng ea ho sesa; Boto ea tataiso e phethela haholo sathelaete navigation, 'me e romela tlhahisoleseding ho boto ea tharollo ea ho tsamaea le boto ea li-interface ho tlatsa tsamaiso e kopanetsoeng.Motlakase oa bobeli oa motlakase le potoloho ea sebopeho li kopantsoe ka sehokelo,' me boto ea potoloho e hokahane ka sehokelo.

Theknoloji ea bohlokoa

1. Morero o kopanetsoeng oa moralo

Airborne fiber optic gyro navigation system e hlokomela likhato tse tšeletseng tsa sefofane sa ho lemoha motsamao oa tokoloho ka ho kopanngoa ha lisele tse ngata. gyro component, e ka arolelana mohloli oa leseli ho phethahatsa moralo oa ho kopanya li-axis tse tharo; Bakeng sa karolo ea accelerometer, quartz flexible accelerometer hangata e sebelisoa, 'me potoloho ea phetoho e ka etsoa ka litsela tse tharo feela.Ho boetse ho na le bothata ba nako. Kamahanyo ho phumano ya data ya disensor tse ngata.Bakeng sa ntlafatso e phahameng ea maikutlo, ho feto-fetoha ha nako ho ka netefatsa ho nepahala ha ntlafatso ea maikutlo.

2. Moralo oa karohano ea lifoto

Fiber optic gyro ke fiber optic sensor e thehiloeng ho phello ea Sagnac ho lekanya lebelo la angular. Har'a bona, lesale la fiber ke karolo ea bohlokoa ea lebelo le utloahalang la angular ea fiber gyroscope.E na le leqeba la limithara tse makholo a 'maloa ho ea ho limithara tse likete tse' maloa tsa fiber.Haeba tšimo ea mocheso oa lesale la optical fiber e fetoha, mocheso sebakeng se seng le se seng sa optical fiber ring e fetoha ha nako e ntse e tsamaea, 'me mahlaseli a mabeli a khanya a feta sebakeng seo. ka linako tse fapaneng (ntle le ntlha e bohareng ea coil ea optical fiber), ba fumana litsela tse fapaneng tsa optical, tse hlahisang phapang ea mohato, phetoho ena e sa tsitsang ea mohato e ke ke ea khetholloa ho tloha ho Sagneke ea mohato o bakoang ke ho potoloha.E le ho ntlafatsa mocheso. ts'ebetso ea fiber optic gyroscope, karolo ea mantlha ea gyroscope, selikalikoe sa fiber, se hloka ho beoa hole le mohloli oa mocheso.

Bakeng sa gyroscope e kopantsoeng ea photoelectric, lisebelisoa tsa photoelectric le liboto tsa potoloho tsa gyroscope li haufi le lesale la optical fiber.Ha sensor e sebetsa, mocheso oa sesebelisoa ka boeona o tla phahama ho isa bohōleng bo itseng, 'me o ama lesale la optical fiber ka mahlaseli le conduction. gyroscope ea optical fiber, e kenyelletsang mokhoa oa mokhoa oa optical le sebopeho sa potoloho, mefuta e 'meli ea sebopeho se ikemetseng karohano, pakeng tsa fiber le waveguide line connection.Qoba mocheso o tsoang lebokoseng la mohloli o khanyang o amang maikutlo a ho fetisa mocheso oa fiber.

3. Moralo oa ho itlhahloba ka matla

Fiber optic gyro strapdown navigation system e hloka ho ba le ts'ebetso ea motlakase ea ho itlhahloba ka sesebelisoa sa inertial.Hobane tsamaiso ea ho tsamaea e amohela ho kenngoa ha strapdown e hloekileng ntle le mochine oa ho fetola, ho itlhahloba ha lisebelisoa tse sa sebetseng ho phethoa ka tekanyo e tsitsitseng likarolong tse peli, e leng. , ho itlhahloba ka boemo ba lisebelisoa le ho itlhahloba ka boemo ba tsamaiso, ntle le ho tsosoa ha phetoho ea ka ntle.

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