Dubhe-M48 – High-Precision Marine RLG Inertial Navigation System (INS)
Dubhe-M48 – High Precision Velocity Integrated Marine Inertial Navigation System (INS)
The Dubhe-M48 is a high-precision, long-endurance marine optical inertial navigation system (INS). It uses laser gyroscopes / fiber optic gyroscopes (RLG/FOG) and quartz flexure accelerometers as core sensors to provide reliable inertial navigation performance for marine platforms.
The system adopts a strapdown inertial navigation architecture combined with modulation techniques, and integrates advanced navigation algorithms to output real-time navigation solutions.
Dubhe-M48 supports multiple operating modes, including:
-
Pure inertial mode
-
GNSS-aided mode
-
Velocity-integrated mode
By offering flexible operating modes, the system provides comprehensive navigation parameters to meet the requirements of different marine applications.
| Series | Maritime Inertial Navigation System(INS-M) | |
| Type | Dubhe-M48 | |
| Accelerometer | Months Bias Repeatability(1σ) | ≤10μg |
| Months Scale Factor Accuracy(1σ) | ≤10ppm | |
| 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 | ≤1hr | |
| Position accuracy | Pure inertia | 1nm/48h,CEP |
| INS/DVL Combination | ≤0.3%D,RMS | |
| INS/GNSS Combination | better than GNSS | |
| Heading Accuracy | Pure inertia | ≤0.04°sec(L),RMS |
| INS/GNSS Combination | ≤0.02°,RMS | |
| Pitch & Roll Accuracy | Pure inertia | ≤0.02°,RMS |
| INS/GNSS Combination | ≤0.01°,RMS | |
| Characteristics | Power consumption | ＜40W |
| Dimensions(Lmm×Wmm×Hmm) | 232×186×160mm | |
| Weight | ＜8.2kg | |
| 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 | |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.