An Autonomous Underwater Vehicle with Remote Piloting Using 4G Technology

Abstract

Abstract Conventional remotely operated vehicles (ROVs) are tethered with umbilical cable and are distantly controlled by a vehicle operator. The ROV control system requires constant monitoring due to complexities caused by unknown nonlinear hydrodynamic effects, parameter uncertainties, and system inflexibilities (conventional ROV systems cannot be preprogrammed and can only be operated at a limited distance due to tether length limitations). Conventional operators are unable to dynamically compensate existing vehicles for operations that need further efficiency, flexibility in movement, and a non-disruptive data transfer. To solve these challenges, Oceaneering introduced its next-generation resident ROV, which provides a new level of flexibility and efficiency while performing common ROV tasks, such as surveys, inspections, valve and torque tool operations, and manipulator-related activities. The next-generation resident ROV is sustained by a docking station at seabed, and its design features hybrid functionality that enables it to operate in two modes: remotely piloted via tether to provide real-time control or by battery power, operating autonomously and without a tether. Using a next-generation resident ROV decreases the number of vessel days required to complete operations, reduces carbon footprint, and minimizes mobilizations. It enables operators to expedite subsea interventions in strategic locations and overcome challenges associated with weather windows. The next-generation resident ROV also improves operational versatility by offering tethered and autonomous operating modes and significantly improved depth ratings that enable it to access difficult-to-reach locations. Vehicle operations are supported by our remote piloting and automated control technology (RPACT) and Onshore Control Center. By delivering a single-source solution, users are able to streamline operations, adopt standardization across projects, and reduce both cost and risk. The operational flexibility of the next-generation resident ROV is driven by proprietary supervisory control software. Whether the vehicle is operating with or without a tether, this software provides complete vehicle control, autonomy, payload and sensor control, topside mission planning, and situational awareness. Oceaneering's proprietary supervisory control software provides key vehicle piloting improvements, including an unprecedented level of awareness in crowded subsea fields. The next-generation resident ROV can also be programmed to make piloting decisions without the need for human pilot control, such as for avoiding obstacles or responding to changing plans. By taking advantage of the known subsea environment, proprietary software enables pilots commanding the next-generation resident ROV to be available for other tasks. This combined software and vehicle configuration makes it possible to perform more tasks, faster and more safely than ever before.