Unmanned Systems News

KVH Develops FOG-Based IMUs & GNSS-INS for Unmanned Systems

Published: 26 Oct 2020 by

KVH Industries, a leading developer of innovative fiber optic gyro (FOG) and inertial sensing technologies for unmanned systems, has partnered with Unmanned Systems Technology (“UST”) to demonstrate their expertise in this field. The ‘Platinum’ profile highlights how their high-precision solutions can be used in UAVs (unmanned aerial vehicles), USVs (unmanned surface vessels), UGVs (unmanned ground vehicles) and UUVs (unmanned underwater vehicles).

KVH DSP 1760 FOG Gyro SensorThe DSP-1760 is a navigation-grade fiber optic gyroscope designed to provide precise navigation, pointing and stabilization for unmanned and autonomous systems on land, at sea or in the air. With a choice of one, two or three axes of the world’s smallest precision FOGs, it provides unmatched versatility for even the most challenging applications.

The high-bandwidth, low-noise angular rate sensor has been developed with KVH’s polarization maintaining ThinFiber technology, miniaturizing the gyro size while boosting accuracy and performance. The DSP-1769 provides a choice of easy-to-integrate housed packaging or an unhoused OEM variant. Housed variants are available with either Micro-D connector or circular connector, and unhoused with a Micro-D connector.

KVH P-1775 FOG IMU SensorThe P-1775 IMU is an advanced FOG-based inertial measurement unit, featuring three axes of magnetometers and either 10g or 25g low-noise accelerometers. Based around state-of-the-art photonic integrated chip (PIC) technology, the P-1775 provides superior reliability and repeatability, making it ideal for the high-accuracy demands of autonomous systems.

The P-1775 delivers extremely high bandwidth, low latency and low drift, and incorporates sophisticated DSP electronics that improve FOG performance in critical areas such as scale factor and bias over temperature, scale factor linearity, and maximum input rate. The unique design overcomes the limitations of analog signal processing, eliminating temperature-sensitive drift and rotation errors.

KVH 1750 IMU High-Performance SensorThe 1750 IMU is a high-precision inertial measurement unit designed for SWaP (size, weight and power)-conscious applications such as UAVs and UGVs. Pairing KVH’s ThinFiber miniature FOG technology with solid state MEMS accelerometers, the compact sensor delivers high bandwidth with very low noise.

With sophisticated DSP electronics that improve FOG performance, the unit provides excellent bias stability and repeatability and features superior shock, vibration, and thermal functionality. The 1750 is available with 2g, 10g, or 30g accelerometers and features a flexible, user-friendly interface with programmable data output rates from 1 – 1000 Hz.

KVH 1725 IMU Fiber Optic Gyro FOG IMUThe 1725 IMU is a 6-degrees-of-freedom (6-DOF) MEMS sensor offering FOG-like performance and stability. Integrating three high-performance KVH gyros and three low-noise MEMS accelerometers, it provides an ideal balance between affordability and high performance and bandwidth.

The lightweight, compact package is easily integrated into a variety of applications, such as UAV mapping and precision platform stabilization. The integrated DSP electronics deliver enhanced scale factor and bias vs. temperature and scale factor linearity. The 1725’s flexible interface provides programmable message outputs, baud and data rates, addressing the needs of a wide range of applications and platforms.

GEO FOG 3D AHRS INSThe GEO-FOG 3D inertial navigation system (INS) complements and enhances GNSS performance, providing accurate navigation data even when satellite signals are blocked or unavailable. Based around 3 axes of FOG gyros, magnetometers and low-noise MEMS accelerometers, and incorporating a pressure sensor and embedded Trimble GNSS receiver, the unit delivers reliable, precise navigation and control for a wide range of unmanned systems in all domains.

The system’s highly intelligent sensor fusion algorithm is up to 10x faster than other systems and extracts more data from the inertial core processor, providing ultra-high bandwidth for the most demanding applications. Providing up to 8 mm positioning accuracy, the GEO-FOG 3D INS also features a continuously-running north-seeking gyrocompass that provides highly accurate heading.

KVH GEO FOG 3D Dual INS AHRS embedded GNSSThe GEO-FOG 3D Dual is the dual-antenna version of the GEO-FOG 3D INS, featuring two GNSS antennas on a fixed RTK baseline and delivering increased heading, pitch, and roll accuracy for both static and dynamic applications where a single antenna system will not suffice.

The dual-antenna INS is ideal for UAVs and robotic vehicles that require heading at start-up or in low dynamic conditions.

To find out more about KVH and their FOG and inertial sensing technologies for unmanned systems, please visit their profile page:

Posted by Mike Ball Mike Ball is our resident technical editor here at Unmanned Systems Technology. Combining his passion for teaching, advanced engineering and all things unmanned, Mike keeps a watchful eye over everything related to the unmanned technical sector. With over 10 years’ experience in the unmanned field and a degree in engineering, Mike’s been heading up our technical team here for the last 8 years. Connect & Contact