1 Product Composition

The XY-INS-F-06 optical fiber combined navigation system consists of three parts: the fiber optic inertial measurement unit (IMU), the secondary power board, and the navigation computer.

2 Functional Requirements

• Capable of measuring the carrier’s motion angular rate and linear acceleration information.
• Capable of performing self-inspection of the equipment and outputting self-inspection information.
• Capable of performing ground self-alignment and air transfer alignment.
• Capable of performing “pure inertial” navigation and “inertial + satellite” combined navigation.
• Capable of receiving primary inertial information and sending navigation information through the communication port.
• Supports online software upgrades.

3 Performance Requirements

1.1  Gyroscope Performance Requirements

• Gyroscope zero bias stability: ≤0.1°/h (1σ, full temperature range);
• Gyroscope zero bias repeatability: ≤0.1°/h (1σ, full temperature range);
• Angular rate range: -500°/s to +500°/s;
• Angle random walk: ≤0.01°/h^1/2 (1σ, full temperature range);
• Scale factor nonlinearity: ≤100ppm;
• Scale factor repeatability: ≤100ppm;
• Measurement bandwidth: 300Hz (phase lag ≤45°, amplitude attenuation ≤-3dB);
• Startup time: ≤10s;

1.2 Accelerometer Performance Requirements

• Accelerometer zero bias stability: ≤50ug (1σ, full temperature range);
• Accelerometer zero bias repeatability: ≤50ug (1σ, full temperature range);
• Measurement range: -25g to 25g;
• Measurement bandwidth: 500Hz (phase lag ≤45°, amplitude attenuation ≤-3dB);

1.3 Self-Inspection Time

Self-inspection time: ≤10s;

1.4 Alignment Method and Time

Alignment method: Transfer alignment (using primary inertial or satellite navigation information) / ground self-alignment;

Alignment time: Transfer alignment ≤3min; Ground self-alignment: ≤5min.

1.5 Alignment Accuracy

Transfer alignment:

• Heading angle: ≤0.05° (1σ);
• Pitch angle: ≤0.02° (1σ);
• Roll angle: ≤0.02° (1σ); Ground self-alignment:
• Heading angle: ≤0.3° (1σ);
• Pitch angle: ≤0.05° (1σ);
• Roll angle: ≤0.05° (1σ);

1.6 Navigation Information Update Rate

Navigation information update rate: 200Hz (configurable);

1.7 Measurement Range

• Pitch angle: -89.5° to +89.5°;
• Roll angle: -180° to +180°;
• Heading angle: 0° to 360°;

1.8 Dynamic Combined Navigation Accuracy (During transfer alignment with maneuvering)

• Pitch angle: ≤0.02° (1σ);
• Roll angle: ≤0.02° (1σ);
• Heading angle: ≤0.05° (1σ);
• Horizontal position accuracy: ≤5m (1σ);
• Height accuracy: ≤10m (1σ);
• Horizontal speed accuracy: ≤0.1m/s (1σ);
• Vertical speed accuracy: ≤0.1m/s (1σ);

1.9 Combined Navigation to Pure Inertial Navigation Accuracy

• Pitch angle: ≤0.1° (within 20min);
• Roll angle: ≤0.1° (within 20min);
• Heading angle: ≤0.1° (within 20min);
• Horizontal positioning hold accuracy: ≤2 nautical miles/20min (CEP50);

4 Equipment and Environmental Requirements

1.10  Physical and Environmental Requirements

1.10.1 Temperature

• Operating temperature: -40°C to +60°C.
• Storage temperature: -50°C to +70°C.

1.10.2 Operating Voltage

• DC18V to 36V, ripple ≤200mV.

1.10.3 Power Consumption

• Maximum instantaneous power consumption at startup: <40W;
• Stable power consumption: <20W;
• Startup current: <1.5A;
• Steady-state current: <0.6A;

1.10.4 Mechanical Dimensions

Figure 4-1 Inertial Navigation Device Dimensions

1.10.5 Electrical Interface

The product’s external connector model is J30J-25ZKP-Q, with the following pin definitions:

1.10.6 Weight

Inertial navigation system weight ≤2kg;

1.11 Environmental Adaptability

1.11.1 Shock

The fiber optic inertial component should function normally after withstanding the shock tests specified in the table below.

1.11.2 Random Vibration

The fiber optic inertial component should function normally under the functional vibration specified in the figure below.

Figure 3-3 Functional Vibration Spectrum