CFD Modeling of the Hydrodynamics of the CIDESI Underwater Glider

Bustos, C.; Sánchez, Jesús; Garcia, L.G.; Orozco, J.P.; Piedra, Saúl

doi:10.1109/oceans.2018.8604482

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…With CFD technology, a variety of more mature underwater gliders have been developed. The motion characteristics of classic underwater gliders have been studied to some extent using CFD technology [10], such as the CIDESI Underwater Glider [11]. The first disc-shaped AUV was Discuz of the Webb Corporation in the United States.…”

Section: Introductionmentioning

confidence: 99%

Development of an Autonomous Underwater Helicopter with High Maneuverability

et al. 2019

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Autonomous Underwater Vehicles (AUVs) are the mainstream equipment for underwater scientific research and engineering. However, it remains a great challenge for AUVs to carry out near-seabed operations because of their poor maneuverability. In this paper, a new design for a high-maneuverability disc-shaped AUV is proposed, namely, the Autonomous Underwater Helicopter (AUH). We designed the AUH’s propulsion system through dynamic analysis based on the unique disc shape. The experimental prototype was built by mechatronics technology, after which several motion experiments were carried out to demonstrate the high maneuverability. We find that the prototype has high maneuverability: it can cruise at 0.8 m/s (about 1.5 knots), at least; its turning radius is zero and its turning speed is at least 20 deg/s; and the motion of specific curves in a small range was completed. It is demonstrated that over-actuation is not necessary for the high-maneuverability AUH because of its unique disc shape. A propulsion system consisting of four propellers and a buoyancy adjustment system is used for the highly maneuverable AUH. In addition, the AUH may be a solution for near-seafloor operations.

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Section: Introductionmentioning

confidence: 99%

Development of an Autonomous Underwater Helicopter with High Maneuverability

et al. 2019

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“…Nevertheless, aspects such as the ROV's autonomy, efficiency in energy consumption, processing and information storage, hydrodynamic structure, position control, and limitations in communication are some of the topics on which current research could contribute [34][35][36][37]. Another factor that can affect the ROV design and implementation is the high cost involved, but it is important to consider an adequate balance between the cost and the functionality of the system in relation to its application [38][39][40][41]. On this issue, one can take advantage of embedded systems, which are very useful for solving real-world problems for different fields of application.…”

Section: Introductionmentioning

confidence: 99%

Design and Construction of an ROV for Underwater Exploration

Aguirre-Castro

Inzunza-González

García-Guerrero

et al. 2019

Sensors

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The design of a remotely operated vehicle (ROV) with a size of 18.41 cm × 29.50 cm × 33.50 cm, and a weight of 15.64 kg, is introduced herein. The main goal is to capture underwater video by remote control communication in real time via Ethernet protocol. The ROV moves under the six brushless motors governed through a smart PID controller (Proportional + Integral + Derivative) and by using pulse-wide modulation with short pulses of 1 μs to improve the stability of the position in relation to the translational, ascent or descent, and rotational movements on three axes to capture images of 800 × 640 pixels on a video graphic array standard. The motion control, 3D position, temperature sensing, and video capture are performed at the same time, exploiting the four cores of the Raspberry Pi 3, using the threading library for parallel computing. In such a way, experimental results show that the video capture stage can process up to 42 frames per second on a Raspberry Pi 3. The remote control of the ROV is executed under a graphical user interface developed in Python, which is suitable for different operating systems, such as GNU/Linux, Windows, Android, and OS X. The proposed ROV can reach up to 100 m underwater, thus solving the issue of divers who can only reach 30 m depth. In addition, the proposed ROV can be useful in underwater applications such as surveillance, operations, maintenance, and measurement.

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Underwater Glider Propulsion Systems VBS Part 1: VBS Sizing and Glider Performance Analysis

Orozco-Muñiz

Salgado-Jiménez

Rodríguez-Olivares

2020

JMSE

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The Variable Buoyancy System (VBS) is a critical device in the operation of underwater gliders that should be properly sized to achieve the required vehicle propulsion; safety within the operating range; and adequate efficiency at the nominal depth rating. The VBS budget volume depends mainly on the glider hydrodynamics and the main operating states of the vehicle. A method is proposed with analytical equations to analyze the performance of underwater gliders and to estimate the resultant velocities of the vehicle as a function of the buoyancy change and the glider angle. The method is validated to analyze the glider performance of underwater gliders and is essential to get the main design requirement for the propulsion system: the VBS budget volume. The paper presents the application of the method to obtain the VBS sizing for an academic glider; a comparison with the historical hydrodynamic data of the Slocum glider; the results of the glider performance study; and the development of the characteristic charts necessary to evaluate the performance of the vehicle and its flight parameters.

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CFD Modeling of the Hydrodynamics of the CIDESI Underwater Glider

Cited by 3 publications

References 8 publications

Development of an Autonomous Underwater Helicopter with High Maneuverability

Development of an Autonomous Underwater Helicopter with High Maneuverability

Design and Construction of an ROV for Underwater Exploration

Underwater Glider Propulsion Systems VBS Part 1: VBS Sizing and Glider Performance Analysis

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