Hydrodynamic and vertical motion analysis of an underwater glider

Yang, Lei; Cao, Junjun; Cao, Junliang; Yao, Baoquan; Zheng, Zeng; Lian, Lian

doi:10.1109/oceansap.2016.7485413

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Vehicle configuration is also important when designing an underwater prototype because its form will increase or decrease hydrodynamics phenomena when it is moving. 8,9 Within the AUVs configurations for this kind of tasks, the glider-type vehicles are the most popular because they have low energy consumption. They can operate with vector propels (hybrid) 10,11 or by means of displacement of mobile masses and physical properties.…”

Section: Introductionmentioning

confidence: 99%

Design, Construction, and Control for an Underwater Vehicle Type Sepiida

García¹,

Castillo²,

Campos³

et al. 2020

Robotica

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SUMMARY A novel underwater vehicle configuration with an operating principle as the Sepiida animal is presented and developed in this paper. The mathematical equations describing the movements of the vehicle are obtained using the Newton–Euler approach. An analysis of the dynamic model is done for control purposes. A prototype and its embedded system are developed for validating analytically and experimentally the proposed mathematical representation. A real-time characterization of one mass is done to relate the pitch angle with the radio of displacement of the mass. In addition, first validation of the closed-loop system is done using a linear controller.

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Section: Introductionmentioning

confidence: 99%

Design, Construction, and Control for an Underwater Vehicle Type Sepiida

García¹,

Castillo²,

Campos³

et al. 2020

Robotica

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“…Despite being more expensive, if performed correctly, this method can be more accurate than the FE method, given the many parameters that need to be taken into consideration in the FEM, and the higher possibility of making mistakes that produce errors in the results. An approach that was chosen by many researchers whether as a first option [8,9], or to validate their CFD work such as [2].…”

mentioning

confidence: 99%

Miniature Underwater Glider Hydrodynamic Performance

Elkolali

Mahran²,

Al-Tawil

et al. 2022

OCEANS 2022, Hampton Roads

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Underwater gliders are becoming an important tool in obtaining in-situ measurements from the ocean. Moving through the water column at slow velocities, their hydrodynamic properties are critical in order to optimize vehicle efficiency and endurance. The hydrodynamic properties also play an important role in defining the allocated budget for the variable buoyancy system of the glider. This paper describes the work performed to optimize the hydrodynamic forces of a small underwater glider, represented in the lift and drag forces of the vehicle, as well as optimizing the angle of attack at which the vehicle is more efficient in producing horizontal motion. The approach used in the analysis is computational fluid dynamics by importing the 3D model of the glider to Ansys Fluent software. The best angle of attack is chosen based on the highest efficiency characterized by the lift-to-drag ratio. Results have shown that the highest lift-to-drag ratio can be obtained at an angle of attack of 10° at speed of 0.2m/s, and 5° at a speed of 0.5m/s.

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Miniature Underwater Glider Hydrodynamic Performance

Elkolali¹,

Al-Tawil²,

Alcocer³

2022

Preprint

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<p>Defining the hydrodynamic properties of an underwater glider is a critical operation that should be properly optimized since it has a great impact on the vehicle’s efficiency. It also defines the allocated budget for the Variable Buoyancy System (VBS) of the glider. This paper describes the work performed to optimize the hydrodynamic forces, represented in the lift and drag forces of the vehicle, as well as optimizing the angle of attack that the vehicle should perform its cycles at. The approach used in the analysis is Computational Fluid Dynamics (CFD) by importing the 3D model of the glider to Ansys software. The best angle of attack is chosen based on the highest efficiency characterized by the lift-to-drag ratio. The polar charts of the vehicle are also drawn based on the vertical and horizontal components of the vehicle’s speed. The results are implemented in the calculations of the VBS of the vehicle, and the definitions of the general operation states of the vehicle.</p>

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Hydrodynamic and vertical motion analysis of an underwater glider

Cited by 3 publications

References 4 publications

Design, Construction, and Control for an Underwater Vehicle Type Sepiida

Design, Construction, and Control for an Underwater Vehicle Type Sepiida

Miniature Underwater Glider Hydrodynamic Performance

Miniature Underwater Glider Hydrodynamic Performance

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