Towards autonomous ocean observing systems using Miniature Underwater Gliders with UAV deployment and recovery capabilities

TL;DR

This paper explores developing an autonomous ocean observing system using miniature underwater gliders supported by UAVs and USVs, aiming to minimize human intervention and enhance operational efficiency.

Contribution

It introduces a novel system integrating Miniature Underwater Gliders with UAV support, featuring a pressure-tolerant Variable Buoyancy System for autonomous deployment and recovery.

Findings

Prototype VBS demonstrated in aquarium

Electronic components tested up to 20 bar pressure

Preliminary results show system viability

Abstract

This paper presents preliminary results towards the development of an autonomous ocean observing system using Miniature Underwater Gliders (MUGs) that can operate with the support of Unmanned Aerial Vehicles (UAVs) and Unmanned Surface Vessels (USVs) for deployment, recovery, battery charging, and communication relay. The system reduces human intervention to the minimum, revolutionizing the affordability of a broad range of surveillance and data collection operations. The MUGs are equipped with a small Variable Buoyancy System (VBS) composed of a gas filled piston and a linear actuator powered by brushless DC motor and a rechargable lithium ion battery in an oil filled flexible enclosure. By using a fully pressure tolerant electronic design the aim is to reduce the total complexity, weight, and cost of the overall system. A first prototype of the VBS was built and demonstrated in a small aquarium. The electronic components were tested in a pressure testing facility to a minimum of 20bar. Preliminary results are promising and future work will focus on system and weight optimization, UAV deployment/recovery strategies, as well as sea trials to an operating depth of 200m.