This article delves into Digital Fiber Optic Gyroscope (DFOG) technology, detailing its functionality and the advantages it offers for both commercial and military uses.
Digital Fiber Optic Gyroscope (DFOG) represents a cutting-edge technology that has been in progress for over 25 years, involving collaboration between two research institutions. This innovation was designed to fulfill the growing need for compact, cost-effective fiber optic gyroscopes (FOGs) while enhancing their reliability and precision.
This technological advancement opens up new possibilities for commercial and defense sectors that require constant, ultra-precise orientation and navigation solutions.
The Evolution of Fiber Optic Gyroscopes
Fiber optic gyroscopes have established a benchmark in inertial navigation systems. Their extraordinary performance and accuracy have been acknowledged for decades, with each iteration introducing significant enhancements.
The inaugural FOG was introduced in 1976, utilizing analog signals and processing. The second generation emerged in 1994 and remains in use today, featuring a hybrid model that combines analog signals in the coil with digital signal processing.
As of 2021, FOG technology has transitioned to Digital FOG. This third generation distinguishes itself by being entirely digital, offering superior performance and reliability while achieving a 40% reduction in size, weight, power consumption, and cost (SWaP-C).
Understanding the Functionality of Digital FOG
The advancements that enable DFOG’s capabilities stem from three complementary technologies designed to enhance fiber optic gyroscopes.
1.Advanced Digital modulation Techniques
DFOG employs a unique digital modulation method that transmits spread spectrum signals through the coil. This innovative approach allows for the measurement and elimination of in-run variable errors within the coil, considerably enhancing the stability and reliability of DFOG compared to traditional FOGs. additionally, it permits a more compact design with a shorter coil length while maintaining the accuracy of longer coils.
2. Innovative Optical Chip
By consolidating five sensitive components into a single chip and eliminating fiber splices, DFOG achieves significant reductions in size, weight, and power consumption, all while markedly enhancing reliability and performance.
3. Custom-Engineered Optical Coil
DFOG features a specially crafted closed-loop optical coil designed to maximize the benefits of digital modulation techniques. This design optimally senses in-run variable coil errors and offers robust protection for optical components against shock and vibration.
Advantages of Digital FOG
Over the past twenty years, FOGs have been the preferred choice for high-performance Inertial Navigation Systems (INS). though, their high costs and substantial size have limited their applicability. DFOG addresses these challenges while significantly enhancing accuracy and reliability.
DFOG makes high-precision inertial navigation accessible to a broader range of applications, including subsea exploration, surveying, marine operations, robotics, aerospace, and space missions.
