Aviation Navigation TDF71A Airborne Optical Gyro Inertial
Navigation
1 Introduction
The airborne optical gyro inertial navigation system (INS) employs
optical gyroscopes and quartz accelerometers as its core sensing
components, utilizing either a strapdown or modulated (dithered)
system architecture. With high-speed embedded navigation
algorithms, it delivers real-time positioning and orientation
data. This product series integrates satellite-based (GNSS),
celestial, barometric altimeter, radio navigation, and visual
perception inputs through configurable fusion architectures,
tailored to mission-specific requirements. Supporting diverse
operational modes ranging from standalone inertial navigation to
hybrid multi-sensor solutions, it provides comprehensive platform
navigation parameters including 3D position, velocity, attitude,
and angular rates.
2 Application Fields
Suitable for fixed-wing UAVs, rotary-wing UAVs, and specialized
airborne vehicles.
3 Performance Characteristics
Supports switching between self-alignment, moving-base alignment,
and transfer alignment based on customer needs.
Supports multi-sensor fusion, incorporating satellite, celestial,
altimeter, radio, and visual navigation data.
Capable of alignment on ground-based vibrating platforms and in-flight alignment.
Equipped with system fault detection and alarm functions.
4 Main parameters
| Type | TDF71A |
| Accelerometer | Months Bias Repeatability | ≤20μg |
| Months Scale Factor Accuracy | ≤20ppm |
| Gyro | Bias Repeatability | ≤0.01°/hr |
| Scale Factor Accuracy | ≤20ppm |
| Random walk | ≤0.005°/√hr |
| Features | Position accuracy | Pure inertia | ≤2nm/1h |
| Inertial navigation satellite combination | better than satellite accuracy |
| Velocity accuracy | Pure inertia | ≤1.5m/s |
| Inertial navigation satellite combination | ≤0.2m/s |
| Angular Rate | ≥±400°/sec |
| Angular Acceleration | 100000°/sec2 |
| Acceleration | ＞25g |
| Angular Attitude | Any Orientation |
| Alignment time | ≤8min |
| Input/output | 3 RS422 full-duplex serial ports, 1 100M Ethernet port |
| Alignment Time | Time | ＜5min |
| AHRS Applications Performance | Heading Accuracy | Pure inertia | ≤0.2°sec(L) |
| Satellite navigation combination | ≤0.1°sec(L) |
| Pitch & Roll Accuracy | Pure inertia | ≤0.03° |
| Satellite navigation combination | ≤0.02° |
| Power consumption | ＜15W |
| Characteristics | Dimensions | 130×130×100 |
| Weight | ＜2.2kg |
| Temperature | -40℃~60℃ |
| Shock | 15g,Half-sine wave 11ms |
| Input Voltage | DC24V(±25%) |
| cooling | Conduction to mounting plate |
| Vibration | 20~2000Hz,6.06g |
| MTBF | ＞20000 hours |
