Product Overview
The Dubhe-A1 is an airborne inertial navigation system built around high-grade optical gyroscopes for fixed-wing and rotary-wing platforms. It delivers ≤1 nm/1 h CEP pure-inertial position accuracy and reaches better-than-satellite accuracy with GNSS fusion, keeping precision through jammed or denied GNSS environments. Alignment completes within 5 minutes in any orientation, and RS-422 plus Ethernet interfaces integrate cleanly with mission computers.
Key Features
- Pure-inertial position accuracy of ≤1 nm/1 h CEP
- Pure-inertial heading accuracy of ≤0.05°·sec(L) RMS and ≤0.01° RMS RMS pitch/roll with INS/GNSS
- Speed accuracy of ≤1.2 m/s RMS pure inertial and ≤0.2 m/s RMS with GNSS
- Gyro bias repeatability ≤0.005°/hr and angular random walk ≤0.003°/√hr
- Alignment time ≤5 min in any orientation; angular rate ≥±400°/s
- Conduction-cooled 195×160×108 mm unit weighing ≤3.9 kg, MTBF ≥20,000 hours
Technical Specifications
| Parameter | Specification |
|---|---|
| Accelerometer bias repeatability (1σ, months) | ≤30 μg |
| Accelerometer scale factor accuracy (1σ, months) | ≤30 ppm |
| Gyro bias repeatability (1σ) | ≤0.005°/hr |
| Gyro scale factor accuracy (1σ) | ≤10 ppm |
| Gyro accuracy (10 s, 1σ) | ≤0.01°/hr (100 s, 1σ) |
| Angular random walk (1σ) | ≤0.003°/√hr |
| Position accuracy (pure inertial) | ≤1 nm/1 h CEP |
| Position accuracy (INS/GNSS) | Better than satellite accuracy |
| Speed accuracy (pure inertial) | ≤1.2 m/s RMS |
| Speed accuracy (INS/GNSS) | ≤ 0.2 m/s RMS |
| Angular rate | ≥ ±400°/s |
| Angular acceleration | 100,000°/s² |
| Acceleration | ≥ 25 g |
| Attitude | Any orientation |
| Alignment time | ≤ 5 min |
| Interfaces | 3 × RS-422 full-duplex, 1 × 100 M Ethernet |
| Heading accuracy (pure inertial) | ≤0.05°·sec(L) RMS |
| Heading accuracy (INS/GNSS) | ≤0.03° RMS |
| Pitch & roll accuracy (pure inertial) | ≤0.03° RMS |
| Pitch & roll accuracy (INS/GNSS) | ≤0.01° RMS |
| Power consumption | ≤20 W |
| Dimensions (L×W×H) | 195×160×108 mm |
| Weight | ≤3.9 kg |
| Operating temperature | -40℃ – +60℃ |
| Shock | 15 g half-sine, 11 ms |
| Supply voltage | DC 24 V ±25% |
| Vibration | 20–2000 Hz, 6.06 g |
| MTBF | ≥ 20,000 hours |
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