Dubhe-M12 – Autonomous Marine Inertial Navigation System (INS)
The Dubhe-M12 Autonomous Marine Inertial Navigation System (INS) is designed for shipborne and marine navigation applications. The system combines laser / fiber optic gyroscope (FOG) technology with quartz accelerometers, forming a reliable inertial sensing solution for maritime platforms.
Adopting a “strapdown with modulation” configuration, the Dubhe-M12 integrates a high-speed navigation computer to process inertial data in real time and output accurate navigation information.
Operating Modes
The Dubhe-M12 supports multiple navigation modes, including:
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Autonomous inertial navigation mode
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Satellite-aided navigation mode
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Velocity-combined navigation mode
These modes enable the system to provide comprehensive positioning and navigation solutions to meet the requirements of various marine applications.
| Series | Maritime Inertial Navigation System(INS-M) | |
| Type | Dubhe-M12 | |
| Accelerometer | Months Bias Repeatability(1σ) | ≤30μg |
| Months Scale Factor Accuracy(1σ) | ≤30ppm | |
| Gyro | Bias Repeatability(1σ) | ≤0.01°/hr |
| Scale Factor Accuracy(1σ) | ≤10ppm | |
| Random walk(1σ) | ≤0.003°/√hr | |
| Features | Angular Rate | ≥±400°/sec |
| Angular Acceleration | 100000°/sec2 | |
| Acceleration | ＞25g | |
| Angular Attitude | Any Orientation | |
| Speed accuracy/Pure inertia | ≤0.6kn,RMS | |
| Speed accuracy/GNSS Combination | ≤0.4kn,RMS | |
| Startup time | ≤10sec | |
| Input/output | 3 RS422 full-duplex serial ports, 1 100M Ethernet port | |
| Alignment time | ≤30min or ≤1hr | |
| Position accuracy | Pure inertia | ≤1nm/6h or ≤1nm/12h ,CEP |
| INS/DVL Combination | ≤0.3%D,RMS | |
| INS/GNSS Combination | better than GNSS | |
| Heading Accuracy | Pure inertia | ≤0.02°sec(L),RMS |
| INS/GNSS Combination | ≤0.01°,RMS | |
| Pitch & Roll Accuracy | Pure inertia | ≤0.01°,RMS |
| INS/GNSS Combination | ≤0.01°,RMS | |
| Characteristics | Power consumption | ＜40W |
| Dimensions(Lmm×Wmm×Hmm) | 193×169×160mm | |
| Weight | ＜6.5kg | |
| Temperature | -40℃~60℃ | |
| Shock | 15g,Half-sine wave 11ms | |
| Input Voltage | DC24V(±25%) | |
| cooling | Conduction to mounting plate | |
| Vibration | 20~2000Hz,6.06g | |
| MTBF | ＞10000 hours | |
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