이동질량장치와 부력엔진을 포함한 무인 수중글라이더의 동역학 모델링 및 운동성능 해석
Dynamic Modeling and Motion Analysis of Unmanned Underwater Gliders with Mass Shifter Unit and Buoyancy Engine
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초록
Underwater gliders do not have any external propulsion systems that can generate and control their motion. Generally, underwatergliders would obtain a propulsive force through the lift force generated on the body by a fluid. Underwater gliders should be equipped withmechanisms that can induce heave and pitch motions. In this study, an inner movable and rotatable mass mechanism was proposed to generate thepitch and roll motions of an underwater glider. In addition, a buoyancy control unit was presented to adjust the displacement of the underwaterglider. The buoyancy control unit could generate the heave motion of the underwater glider. In order to analyze the underwater dynamic behaviorof this system, nonlinear 6-DOF dynamic equations that included mathematical models of the inner movable mass and buoyancy control unit werederived. Only kinematic characteristics such as the location of the inner movable mass and the piston position of the buoyancy control unit wereconsidered because the velocities of these systems are very slow. The effectiveness of the proposed dynamic modeling was verified through sawtoothand spiraling motion simulations.
Abstract
Underwater gliders do not have any external propulsion systems that can generate and control their motion. Generally, underwatergliders would obtain a propulsive force through the lift force generated on the body by a fluid. Underwater gliders should be equipped withmechanisms that can induce heave and pitch motions. In this study, an inner movable and rotatable mass mechanism was proposed to generate thepitch and roll motions of an underwater glider. In addition, a buoyancy control unit was presented to adjust the displacement of the underwaterglider. The buoyancy control unit could generate the heave motion of the underwater glider. In order to analyze the underwater dynamic behaviorof this system, nonlinear 6-DOF dynamic equations that included mathematical models of the inner movable mass and buoyancy control unit werederived. Only kinematic characteristics such as the location of the inner movable mass and the piston position of the buoyancy control unit wereconsidered because the velocities of these systems are very slow. The effectiveness of the proposed dynamic modeling was verified through sawtoothand spiraling motion simulations.
참고문헌 (15)
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