Experimental Study on Hydrodynamic Coefficients of Autonomous Underwater Glider Using Vertical Planar Motion Mechanism Test

정, 진우; 정, 재훈; 김, 인규; 이, 승건

doi:10.5574/ksoe.2014.28.2.119

Cited by 10 publications

(4 citation statements)

References 3 publications

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“…In our simulation, we used the hydrodynamic coefficient from Jung's study on the vertical planar motion mechanism (VPMM) test. 15 More hydrodynamic coefficients were calculated using the coefficient estimation method developed by Prestero. 16 The simulation was written in MATLAB/Simulink.…”

Section: Underwater Glider Simulationmentioning

confidence: 99%

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Optimal design of combined propulsion Underwater Glider for operation of the East Sea of South Korea

Hong

Lee

Hyeon

et al. 2019

Advances in Mechanical Engineering

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An underwater glider is an autonomous underwater vehicle that is propelled by changes in volume. Due to this propulsion method, it is possible to make observations with these devices continuously for 30-60 days. Of the gliders' physical properties, the volume change has the greatest influence on the cruising speed. The speed can be increased by increasing the volume change, but this also increases the energy consumption. Therefore, the change in buoyancy is very important for the operation of underwater gliders. Hence, it is necessary to optimize the change in buoyancy. In this study, we describe a technique for optimizing the design of underwater gliders intended to operate in the East Sea of Korea using a combined buoyancy engine and thruster propulsion system. First, we carried out a simulation study to optimize the volume change of the buoyancy engine based on the average flow velocity distribution, water temperature, and vertical salinity distribution in the East Sea. Then, we used our simulations to predict the optimal change in volume of the underwater glider. Finally, we discuss the advantages of operating with thrusters in special environments under specific water temperature, salinity distribution, and ocean current conditions.

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Section: Underwater Glider Simulationmentioning

confidence: 99%

“…Figures [14][15][16] show the results of the simulations, for which we operated at a depth of 10-200 m and varied the total volume of the device by 1% ( 6 600 cc). Figure 14 shows that the horizontal speed was 1.195 knots, when both rising and falling.…”

Section: Underwater Glider Simulationmentioning

confidence: 99%

Optimal design of combined propulsion Underwater Glider for operation of the East Sea of South Korea

Hong

Lee

Hyeon

et al. 2019

Advances in Mechanical Engineering

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“…본 연구에서의의 수중운동체에 대하여 부력중심을 기준으로 하는 몸체고정좌표계의 연직면 운동방정식은 다음과 같다 (Gertler and Hagen, 1967;Jung et al, 2014b). …”

Section: 수중운동체 연직면 운동방정식unclassified

An Experimental Study on Effect of Angle of Attack on Elevator Control Force for Underwater Vehicle with Separate Fixed Fins

박¹,

신²,

최³

et al. 2016

Journal of Ocean Engineering and Technology

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“…In addition to stability analysis, resistance, static drift, static angle of attack, horizontal and vertical turning, and combined tests were performed to estimate a damping coefficient, excluding the added mass coefficient. Jung et al (2014) estimated added mass and damping coefficients by performing a vertical planar motion mechanism test in a linear towing tank for an autonomous underwater glider. In addition, they modeled the equation of motion based on the estimated coefficients to be adopted as the plant model for a control simulation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Dynamic Characteristics for a Submerged Body with Large Angle of Attack Motion via CFD Analysis

Jeon

Mai

Yoon

et al. 2021

J. Ocean Eng. Technol.

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A submerged body with varied control inputs can execute large drift angles and large angles of attack, as well as basic control such as straight movement and turning. The objective of this study is to analyze the dynamic characteristics of a submerged body comprising six thrusters and six control planes, which is capable of a large drift angle and angle of attack motion. Virtual captive model tests via were analyzed via computational fluid dynamics (CFD) to determine the dynamic characteristics of the submerged body. A test matrix of virtual captive model tests specialized for large-angle motion was established. Based on this test matrix, virtual captive model tests were performed with a drift angle and angle of attack of approximately 30° and 90°, respectively. The characteristics of the hydrodynamic force acting on the horizontal and vertical surfaces of the submerged body were analyzed under the large-angle motion condition, and a model representing this hydrodynamic force was established. In addition, maneuvering simulation was performed to evaluate the standard maneuverability and dynamic characteristics of large-angle motion. Considering the shape characteristics of the submerged body, we attempt to verify the feasibility of the analysis results by analyzing the characteristics of the hydrodynamic force when the large-angle motion occurred.

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Experimental Study on Hydrodynamic Coefficients of Autonomous Underwater Glider Using Vertical Planar Motion Mechanism Test

Cited by 10 publications

References 3 publications

Optimal design of combined propulsion Underwater Glider for operation of the East Sea of South Korea

Optimal design of combined propulsion Underwater Glider for operation of the East Sea of South Korea

An Experimental Study on Effect of Angle of Attack on Elevator Control Force for Underwater Vehicle with Separate Fixed Fins

Evaluation of Dynamic Characteristics for a Submerged Body with Large Angle of Attack Motion via CFD Analysis

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