Navigation et avionique
Systemes de navigation inertielle et composants specialement concus, y compris les systemes INS (a cardan ou strap-down) pour aeronefs, vehicules terrestres, navires, sous-marins ou vehicules spatiaux. Les seuils portent sur la precision de navigation (CEP <= 0,8 mille nautique/heure), la derive des gyroscopes et le biais des accelerometres.
| Reference | Parametre | Seuil |
|---|---|---|
| 7A003.a.1 | free inertial position accuracy (CEP) | <= 0.8 nautical mile/hour |
| 7A003.a.2 | linear acceleration tolerance | > 10 g |
| 7A003.b.1 | gyroscope drift rate (bias stability) | < 0.5 °/hour |
| 7A003.b.2 | gyroscope linear acceleration tolerance | > 100 g |
| 7A003.b.3 | angle random walk | <= 0.0035 °/√h |
| 7A003.c.1 | accelerometer bias stability (1 year) | < 130 µg |
| 7A003.c.2 | accelerometer scale factor stability (1 year) | < 130 ppm |
| 7A003.c.3 | accelerometer linear acceleration tolerance | > 100 g |
| 7A003.c.1 | accuracy" without the use of ‘positional aiding references’ | < 007 deg |
| 7A003.c.2 | accuracy" without the use of ‘positional aiding references’ | < 02 deg |
7A003.aInertial Navigation Systems (INS) (gimballed or strapdown) and inertial equipment, designed for 'aircraft', land vehicles, vessels (surface or underwater), or 'spacecraft', having any of the following:
7A003.a.1Navigation position accuracy (free inertial) equal to or less (better) than 0.8 nautical mile per hour (nm/hr) Circular Error Probable (CEP) or less
7A003.a.2Specified to function at linear acceleration levels exceeding 10 g
7A003.bGyroscopes having any of the following:
7A003.b.1A rated drift rate (bias stability) of less (better) than 0.5 degree per hour in a 1-g environment
7A003.b.2Specified to function at linear acceleration levels exceeding 100 g
7A003.b.3An 'angle random walk' equal to or less (better) than 0.0035 degree per square root hour
7A003.cAccelerometers designed for use in inertial navigation or guidance systems and having any of the following:
7A003.c.1A 'bias' 'stability' of less (better) than 130 micro g with respect to a fixed calibration value over a period of one year
7A003.c.2A 'scale factor' 'stability' of less (better) than 130 ppm with respect to a fixed calibration value over a period of one year
7A003.c.3Specified to function at linear acceleration levels exceeding 100 g
7A003.a.10,8 nautical miles per hour (nm/hr) "Circular Error Probable" ("CEP") rate or less (better);
7A003.a.20,5 % distanced travelled "CEP" or less (better); or
7A003.a.3Total drift of 1 nautical mile "CEP" or less (better) in a 24 hr period;
7A003.c.1A maximum operating angular rate less (lower) than 500 deg/s and a heading "accuracy" without the use of ‘positional aiding references’ equal to or less (better) than 0,07 deg sec(Lat) (equivalent to 6 arc minutes rms at 45 degrees latitude); or
7A003.c.2A maximum operating angular rate equal to or greater (higher) than 500 deg/s and a heading "accuracy" without the use of ‘positional aiding references’ equal to or less (better) than 0,2 deg sec(Lat) (equivalent to 17 arc minutes rms at 45 degrees latitude); or
7A003.dProviding acceleration measurements or angular rate measurements, in more than one dimension, and having any of the following:
7A003.d.1Performance specified in 7A001 or 7A002 along any axis, without the use of any aiding references; or
7A003.d.2Being "space-qualified" and providing angular rate measurements having an "angle random walk" along any axis of less (better) than or equal to 0,1 degree per square root hour.
Note de decontrole
Les centrales inertielles pour aeronefs civils certifies sont partiellement exemptees. Les capteurs MEMS de grade grand public (smartphones, drones de loisir) sont generalement sous les seuils de controle.
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