The YNS-21 laser strapdown inertial navigation system is an inertial navigation system based on the company's self-produced 58-type three-axis laser gyroscope and three quartz flexible accelerometers. It has a compact structure, external 4-point vibration reduction, and an integrated design. The overall dimensions of the whole machine are 150mm*120mm*107mm, and the weight is less than 2.5Kg.
◆ Performance indicators
| Indicator Type | Indicator name | Performance Indicators | |
| System accuracy | Azimuth(Heading Angle) | ≤0.05° (Pure inertia 5 minutes alignment) | |
| Attitude Angle | ≤0.01° | ||
| （Roll Angle and Pitch Angle）(1σ) | |||
| Position | Level(CEP) | 1 nmile（Pure inertia 1h） | |
| Inertial device accuracy | Laser gyro related indicators | Dynamic Range | ±400deg/s |
| Bias Zero Stability(1σ) | ≤0.01 deg/h | ||
| Scale factor nonlinearity(1σ) | ≤5 ppm | ||
| Accelerometer related indicators | Range | ±20g | |
| Bias Zero Stability(1σ) | ≤10μg | ||
| Power supply and electrical Port | Power Supply | Voltage | +24 V DC |
| Power consumption | ≤20 W | ||
| Communication interface | RS-422/RS232/CAN | Optional | |
| Data update rate | 200Hz | ||
| Environmental adaptability | Operating temperature | -40°C~+60°C | |
| Storage temperature | -55°C~+85°C | ||
| Physical properties | Size (L*W*H) | 150 × 120 × 107mm | |
| Weight | ≤2.5kg | ||
◆ Gyroscope installation dimensions
