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The hydrodynamic shape, which incorporates superior turn-5 ing maneuverability and gliding stability, is an important factor for un-6 derwater gliders (UGs) to realize remarkable endurance. In this study, a 7 six-DOF parameterized dynamic model of Petrel-L glider, involving the 8 variables of wing location and stabilizer area, is established by imp...
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... ICEM to draw the mesh. Finally, the hydrodynamic forces can be obtained by inputting the mesh file into the software ANSYS Fluent. To obtain the viscous hydrodynamic coefficients, the oblique towing pool test and the rotating arm pool test of the horizontal plane and the vertical plane are carried out respectively by the CFD method, as shown in Fig. 7. To reduce the computing cost, an automatic calculation platform is established by integrating the above-mentioned software. 4) Establishment and verification. The approximate models are fitted and established with 75% of the collected data, which are verified with the other 25%. If their accuracy satisfies the requirements, the ...
Citations
... With the advent of high-computational computers, dynamic models of gliders have been rapidly developed. Yang et al. [28] established a six-dof (six degrees of freedom) parameterized dynamic model of the Petrel-L glider and explored the effects of wing location and net buoyancy on turning maneuverability and gliding stability. Wang et al. [29] developed the dynamics model of gliders using dual quaternions to solve the "gimbal lock" problem caused by the increased pitch angle range, which furtherly enriched the motion modes of the glider. ...
Marine monitoring equipment such as Argo profiling buoys and underwater gliders are important devices for oceanographic research and marine resource exploration. In this study, a novel mobile buoy capable of vertical profiling motion like Argo profiling buoys and sawtooth gliding motion like underwater gliders is proposed. The proposed mobile buoy can switch between the two motion modes with controllable wings. To verify the feasibility of the proposed mobile buoy, a fluid–multibody coupling model considering multibody dynamics and hydrodynamics was developed to investigate the dynamic response. A scaled-down buoy prototype was fabricated and the feasibility of the two motion modes was experimentally investigated in a laboratory tank. The experimental results agree well with the results of numerical simulation. This work can be helpful for the design and analysis of this kind of mobile buoy.
