Dubhe-A1 – Celestial RLG Inertial Positioning System | Aerospace Inertial Navigation System for Drones
The Dubhe-A1 is an airborne optical gyro inertial navigation system (INS) designed for drones and specialized aircraft. It integrates FOG/RLG gyroscopes and quartz accelerometers as core sensors, using strapdown or modulated architecture. Its high-speed navigation computer runs advanced algorithms to provide real-time navigation solutions.
The system supports multiple operational modes, including pure inertial navigation and multi-source fusion of GNSS, celestial navigation, altimeters, radio, and vision, delivering complete navigation parameters for airborne platforms.
Applications
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Fixed-wing UAVs
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Rotary-wing UAVs
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Special aircraft
Key Features
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Ground sway base and airborne alignment capability
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Switchable alignment modes: self, transfer, or moving base
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Multi-source navigation fusion for enhanced accuracy
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Fault detection and alarm functions for operational reliability
| Series | Aerospace Inertial Navigation System(INS-A) | ||
| Type | Dubhe-A1 | ||
| Accelerometer | Months Bias Repeatability(1σ) | ≤30μg | |
| Months Scale Factor Accuracy(1σ) | ≤30ppm | ||
| Gyro | Bias Repeatability(1σ) | ≤0.008°/hr | |
| Scale Factor Accuracy(1σ) | ≤10ppm | ||
| Random walk(1σ) | ≤0.003°/√hr | ||
| Features | Position Accuracy | Pure inertia | ≤1.0nm/1h,CEP |
| INS/GNSS combination | better than GNSS | ||
| Speed Accuracy | Pure inertia | ≤1.2m/s,RMS | |
| INS/GNSS combination | ≤0.2m/s,RMS | ||
| Angular Rate | ≥±400°/sec | ||
| Angular Acceleration | 100000°/sec2 | ||
| Acceleration | ＞25g | ||
| Angular Attitude | Any Orientation | ||
| Input/output | 3 RS422 full-duplex serial ports, 1 100M Ethernet port | ||
| Alignment time | ＜5min | ||
| AHRS Applications Performance | Heading Accuracy | Pure inertia | ≤0.05°sec(L),RMS |
| INS/GNSS combination | ≤0.03°,RMS | ||
| Pitch & Roll Accuracy | Pure inertia | ≤0.03°,RMS | |
| INS/GNSS combination | ≤0.015°,RMS | ||
| Characteristics | Power consumption | ＜20W | |
| Dimensions | 195×160×108 | ||
| Weight | ＜3.9kg | ||
| Temperature | -40℃~60℃ | ||
| Shock | 15g,Half-sine wave 11ms | ||
| Input Voltage | DC24V(±25%) | ||
| cooling | Conduction to mounting plate | ||
| Vibration | 20~2000Hz,6.06g | ||
| MTBF | ＞20000 hours | ||
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