Gyrocompass And Kalman Filter GNSS Integrated Optical Quartz Strapdown Marine Inertial Navigation System INS
The Maritime FOG Inertial Navigation System integrates high-precision fiber optic gyroscopes (FOG) or ring laser gyroscopes (RLG) with quartz flexure accelerometers as core inertial sensors. Using an optimized strapdown architecture and high-speed navigation algorithms, the system generates continuous real-time solutions for heading, attitude, velocity, and position.
The INS supports multiple operation modes, including standalone inertial navigation, GNSS-aided integrated navigation, and velocity-compensated modes. This flexibility enables the system to adapt to a variety of marine applications, providing full navigation outputs for both commercial and defense maritime platforms. Consistent performance is maintained even in GPS-denied or degraded maritime environments, ensuring mission safety and operational continuity.
Key AdvantagesINS
✔ High-stability FOG/RLG gyroscopes with low drift
✔ Quartz accelerometers for improved bias stability
✔ Robust strapdown computational architecture
✔ GNSS integration for hybrid navigation precision
✔ Reliable heading & attitude output in dynamic conditions
✔ Continuous real-time PVT (Position, Velocity, Time) data
Applications
Suitable for a wide range of maritime platforms, including:
• Hydrographic survey vessels
• Commercial ships & merchant fleets
• Offshore oil & energy platforms
• USV/AUV autonomous maritime systems
• Naval/Defense maritime operations
• Port & harbor navigation systems
| Series | Maritime Inertial Navigation System(INS-M) | |
| Accelerometer | Months Bias Repeatability(1σ) | ≤50μg |
| Months Scale Factor Accuracy(1σ) | ≤50ppm | |
| Gyro | Bias Repeatability(1σ) | ≤0.02°/hr |
| Scale Factor Accuracy(1σ) | ≤50ppm | |
| Random walk(1σ) | ≤0.006°/√hr | |
| Features | Angular Rate | ≥±400°/sec |
| Angular Acceleration | 100000°/sec2 | |
| Acceleration | ＞25g | |
| Angular Attitude | Any Orientation | |
| Speed accuracy(Velocity damping) | ≤3.0kn,RMS | |
| Startup time | ≤10 sec | |
| Input/output | 3 RS422 full-duplex serial ports, 1 100M Ethernet port | |
| Alignment time | ≤15min | |
| Position accuracy | Pure inertia | ≤4nm/1h,CEP |
| Inertia/DVL Combination | ≤0.6%D,RMS | |
| Inertia/GNSS Combination | better than satellite accuracy | |
| AHRS Applications Performance | Heading Accuracy | ≤0.2°sec(L),RMS |
| Pitch & Roll Accuracy | ≤0.04°,RMS | |
| Characteristics | Power consumption | ＜15W |
| Dimensions(Lmm×Wmm×Hmm) | 110×110×100 | |
| Weight | ＜1.7kg | |
| 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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