High Bandwidth Fiber Optic INS System: Unmatched Precision for Unmanned Systems in Complex Environments

As unmanned systems (UAVs, autonomous vehicles, marine vessels) push into increasingly challenging operating environments—from dense urban canyons to remote industrial sites—there is an urgent demand for navigation solutions that maintain uninterrupted precision and reliability even when GNSS signals are blocked or degraded. Our new High Bandwidth Fiber Optic INS System answers this challenge, combining state-of-the-art fiber optic gyroscopes (FOG), high-precision quartz flexure accelerometers, and a mobile mapping-grade multi-mode GNSS receiver with native BeiDou support.

Powered by advanced intelligent integrated navigation algorithms and optimized Kalman filtering, this system is engineered to deliver high-accuracy heading, attitude, velocity, and position measurement for moving carriers, making it the ideal choice for long-duration, mission-critical unmanned system applications.

At the heart of the system is a carefully curated sensor stack designed for maximum performance:

• Three-axis integrated high-precision fiber optic gyro (FOG): Delivers ultra-stable angular rate measurement with a range of ±500°/s and zero bias stability of ≤0.02°/h (1σ, 10s smooth), ensuring minimal drift over extended operations.
• High-precision quartz flexure accelerometer: Offers a measurement range of ±20g and zero bias stability of ≤20μg (1σ, 10s smooth), enabling precise linear acceleration sensing for accurate velocity and position calculation.
• Mobile mapping-grade multi-mode/multi-frequency GNSS receiver: Fully supports China’s autonomous BeiDou constellation alongside other global navigation systems, providing robust signal acquisition and tracking even in challenging signal environments.

The system leverages intelligent integrated navigation algorithms and optimized Kalman filtering specifically designed to mitigate GNSS obstruction and multi-path interference—common pain points in urban canyons, forests, and industrial zones. This ensures:

• Seamless transition between GNSS and inertial navigation modes
• Minimal performance degradation during signal outages
• Sustained high accuracy across long-duration missions

To support diverse application needs, the system offers a rich set of external sensor interfaces, including:

• GNSS
• Odometer (ODO)
• Doppler Velocity Log (DVL)
• Barometric altimeter

This flexibility allows for extended navigation performance, such as achieving a position accuracy of 0.25% * distance traveled when integrated with an external odometer, making it suitable for long-haul autonomous vehicle and marine applications.

For scenarios where GNSS is completely unavailable, the system maintains exceptional navigation stability:

• Azimuth alignment accuracy: ≤0.1°sec(Φ) (1σ, Φ = local latitude)
• Horizontal attitude alignment accuracy: ≤0.006° (1σ)
• Azimuth hold accuracy: 0.02°/h (1σ)
• Positioning accuracy: ≤1 nautical mile/h (50% CEP)
• Horizontal speed accuracy: ≤0.8m/s (1σ)

This high-precision integrated INS is purpose-built for the following unmanned system use cases:

• Unmanned Aerial Vehicles (UAVs): Mapping, surveillance, and delivery drones operating in urban or mountainous areas
• Autonomous Ground Vehicles (AGVs): Industrial logistics, mining, and urban autonomous driving
• Unmanned Surface Vehicles (USVs)/Underwater Vehicles (UUVs): Marine survey, search-and-rescue, and coastal monitoring
• Specialized Robotics: Industrial inspection, construction automation, and military tactical systems

Our new High Bandwidth Fiber Optic INS System represents a leap forward in reliable, high-accuracy navigation for unmanned systems. By combining state-of-the-art FOG and quartz accelerometer technology with BeiDou-enabled GNSS and advanced filtering algorithms, it delivers the performance and resilience needed to operate in the most challenging environments.

For engineers and system integrators looking to build next-generation unmanned systems, this INS provides the perfect balance of precision, reliability, and flexibility—ensuring mission success even when GNSS signals fail.