An Autonomous Underwater Glider With Improved Transport Efficiency

Abstract

In this article, we present the design and test results of an autonomous underwater glider: Enhanced Propulsion Integrated Capability—Deep Autonomous Underwater Glider. This modified Slocum glider uses redesigned lifting surfaces and hybrid propulsion that are optimized for efficient operation in confined depth bands, deep water profiling, and adverse currents. Modeling suggests a maximum through-water velocity approaching 2 m/s and a theoretical maximum range up to 7000 km when equipped with a commercially available Li-ion rechargeable battery pack. Results indicate more than 30% improvement in glide efficiency and demonstrate the ability of this vehicle to operate equally well within ice-covered coastal regions and the deep ocean. These capabilities, combined with an improved navigation process, permit long-range and shore-launched missions with energy-intensive payloads.