Dubhe-90 Spacecraft Sagnac Ring Laser Gyroscope for INS
RLG (Dubhe-90)
The Ring Laser Gyroscope (RLG) operates based on the Sagnac effect, measuring angular increments by detecting the phase difference between counter-propagating laser beams within a closed glass cavity.
With high integration, exceptional reliability, strong environmental adaptability, and stable performance, the Dubhe-90 RLG is widely used in high-precision inertial navigation systems (INS).
Applications
The Dubhe-90 RLG is suitable for navigation and attitude reference in:
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Spacecraft
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Aircraft
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Satellites
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Vehicles
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Ships
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Submersibles
Key Features
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Monolithic optical and electronic packaging, enabling easy installation
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Compact and lightweight design with controlled power consumption
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High reliability with strong resistance to shock and vibration
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Wide dynamic response bandwidth with digital output
| Series | RLG Series | |
| Type | Dubhe-90 | |
| Performance | Bias stability (1σ) | 0.004°/h~0.002°/h |
| Zero bias repeatability (1σ) | 0.002°/h~0.001°/h | |
| ARW(Angular random walk(1σ) | 0.0007°/√hr~0.0004°/√hr | |
| Scale factor error (1σ) | ≤2ppm | |
| Dynamic Range | ≥±400°/s | |
| Bandwidth | ＞200Hz | |
| Electrical Interface | Turn on time | ＜5s |
| Output signal format | TTL | |
| Built in self-test | yes | |
| Output signal update rate | 1Hz | |
| Output signal baud rate | 115200 | |
| Vibration shock | 75g, half sine, 6ms | |
| Operating temperature | - 40℃ ~ + 70℃ | |
| Storage temperature | - 55℃ ~ + 85℃ | |
| Physical Specifications | Power supply | ±15V,±5V |
| Connector (25 pins) | J30JM-37ZKP36 | |
| Power consumption | ≤3W | |
| MTBF (per MIL-HDBK-217-F) | ＞10000hr | |
| Weight | 2kg | |
| Dimensions | 151mm×126mm×57mm | |
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