Sticth Posted June 7, 2016 Report Share Posted June 7, 2016 Salve a tutti! Sono nuovo perciò spero di aver azzeccato la sezione e di aver fatto bene ad aprire una nuova discussione. Premetto che nonostante mi piacciano molto, non sono molto colto sui velivoli militari, quindi scusate in anticipo per qualche domanda stupida. Detto ciò, sto preparando una tesina sull'F-117 e di elettronica vorrei portare il suo sistema a infrarossi e puntamento al laser. Ho cercato su internet e sul forum ma non sono riuscito a trovare niente di abbastanza dettagliato. La mia prof. di elettronica mi ha detto che sicuramente dovrò parlare dei sensori a infrarossi, ma avrei bisogno di qualche informazione sul FLIR migliore della paginetta di Wikipedia, qualcuno può fornirmi qualche link (anche in inglese)? P.S Ho letto che oltre al FLIR il Nighthawk ha anche il DLIR, ma immagino il funzionamento sia lo stesso, vero? Grazie mille in anticipo! Link to comment Share on other sites More sharing options...
Popular Post fabio-22raptor Posted June 7, 2016 Popular Post Report Share Posted June 7, 2016 Il sistema in se stesso si chiamava IRADS. FLIR e DLIR sono parti della stessa componente avionica.SI trova qualche stralcio qua e la cercando IRADS. Il funzionamento era circa questo: The Night Hawk's targeting sensor suite consists of two IRADS (Infra-Red Acquisition and Detection System) turrets located above and below the aircraft's nose, containing FLIR (Forward-Looking Infra-Red) and DLIR sensors, respectively. Each of two turrets have three apertures: for FLIR, laser and TV cameras. The turrets themselves are derived from those used by Rockwell OV-10D Bronco NOGS (Night Observation/Gunship System) aircraft. The F-117A's sensors can acquire targets from about 10-15 miles. Each IRADS turret contains a laser designator, which goes on and off periodically to determine the distance to the target. The F-117A relies on its own laser designators for targeting.The target is first detected by upper turret containing FLIR sensor, which leads the target to the point when it's about to disappear under the aircraft. At that point the tracking function is transferred to the bottom turret, containing the DLIR sensor. This transition process is not entirely smooth, as there believed to be a small gap between the coverage areas of the two turrets. Altro stralcio: The IRADS is built by Texas Instrument (now Raytheon). As mentioned previously two turrets are mounted in "contour" to conform to set RCS criteria. The target is initially acqiured by the FLIR unit, located in the top turret. It is then tracked by a video camera and displayed on the IR targeting screen in the cockpit. As the "look angle" increases, the target is "handed off" to the DLIR, housed in the lower turret. Because the two turrets are identical (and interchangeable), the video picture received by the DLIR has to be inverted electronically when displayed to the pilot, thus enabling the image to remain top side up. Despite many initial problems, the system is capable of tracking the target throughout dive-toss-type deliveries, where it could be subjected to as many as three handoffs and air loads of 4 positive -g during loft maneuvers. Link to comment Share on other sites More sharing options...
Sticth Posted June 7, 2016 Author Report Share Posted June 7, 2016 Grazie mille! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now