Results 11 to 20 of about 4,226,830 (170)

Investigation of the Asymmetric Features of X-Rudder Underwater Vehicle Vertical Maneuvring and Novel Motion Prediction Technology

Journal of Marine Science and Engineering
An X-rudder underwater vehicle’s hydrodynamic force acting on its rudder will display asymmetrical characteristics during vertical movement that are absent from a cross-rudder vehicle.
Yinghua Li, Ziying Pan, Yongcheng Li, Changyou Song, Minghui Zhang, Mengchen Ren   +5 more
doaj   +3 more sources

Hydrodynamic characteristics of X-Twisted rudder for large container carriers

International Journal of Naval Architecture and Ocean Engineering, 2012
This paper shows the numerical and experimental results about the hydrodynamic characteristics of X-Twisted rudders having continuous twist of the leading edge along the span.
Kyoungsoo Ahn, Gil-Hwan Choi, Dong-Igk Son, Key-Pyo Rhee   +3 more
doaj   +2 more sources

Adaptive Path Tracking Control of X-Rudder AUV Under Roll Constraints

Journal of Marine Science and Engineering
This paper addresses the spatial path tracking problem of the X-rudder autonomous underwater vehicle (AUV) under random sea current disturbances.
Yaopeng Zhong, Jianping Yuan, Lei Wan, Zheyuan Zhou, Qingdong Chen   +4 more
doaj   +2 more sources

Computational Fluid Dynamics Investigation of Hydrodynamic Forces and Moments Acting on Stern Rudder Plane Configurations of a Submarine

Applied Sciences
This study presents the predicted hydrodynamic characteristics of different rudder plane configurations on the stern of a full-scale submarine in deep water, which are obtained using the Reynolds-Averaged Navier–Stokes method in Ansys Fluent Solver ...
Thanh Long Phan, Thi Loan Mai, Tien Thua Nguyen   +2 more
doaj   +2 more sources

Experimental Study on the Flow Field, Force, and Moment Measurements of Submarines with Different Stern Control Surfaces

Journal of Marine Science and Engineering, 2023
Flow field performance tests of submarine models with cross-rudder and X-rudder stern control surfaces were conducted to study X-rudders’ performance in non-uniform flow fields.
Lin Ke, Jinming Ye, Qiufeng Liang
doaj   +1 more source

Influence of Design Parameters of High-Speed Undersea Vehicles with X-Shaped All-Movable Rudder and Cross-Shaped Fin on Maneuverability

水下无人系统学报, 2023
Parameterized shape of the undersea vehicle with X-shaped full-rudder and cross-shaped fin layout was established.The function of the fluid dynamic coefficient of the undersea vehicle with the size of each part was established by the principle of ...
Rui ZHANG
doaj   +1 more source

Research on Fault-tolerant Control Allocation Technology for X-rudder UUV

Journal of Physics: Conference Series, 2023
Abstract X-rudder UUV is a typical redundant control system with high reliability and high control difficulty. This article researches the reconfigurable control allocation technology of X-rudder UUV control, analyzes and sorts out typical fault types of X-rudder UUV, and designs a reconfigurable control allocation algorithm without ...
Hao Xu, Jiaxiang Feng, Pei Zhang, Chenfei Ma   +3 more
openaire   +1 more source

Design of space turning motion control system of X-rudder submarine

Zhongguo Jianchuan Yanjiu, 2020
[Objectives] In order to solve the problem of space turning motion control for the X-rudder submarine,a fuzzy control system for turning of the X-rudder submarine is designed by using the fuzzy control method.[Methods] A weight fuzzy system for the X ...
XIA Ji, HUANG Bin
doaj   +1 more source

Anti-roll control and maneuverability test of X-rudder autonomous underwater vehicle

Zhongguo Jianchuan Yanjiu, 2021
ObjectiveAiming at solving the roll problem of the new X-rudder autonomous underwater vehicle (XAUV) during field tests, a series of anti-roll fixed depth and heading control experiments and maneuverability tests are carried out.
Zhemin HUANG, Zhouji CHENG, Yingkai XIA, Guohua XU, Ben LI, Xingbang PAN   +5 more
doaj   +1 more source

Helmeted hornbill cranial kinesis: Balancing mobility and stability in a high-impact joint. [PDF]

Anat Rec (Hoboken)
Abstract Prokinesis—in which a craniofacial joint allows the rostrum to move relative to the braincase—is thought to confer diverse advantages in birds, mostly for feeding. A craniofacial joint would, however, be a weak link if cranial stability is important. Paradoxically, we have identified a craniofacial joint in helmeted hornbills (Rhinoplax vigil),
Schindler M, Flaum B, Manafzadeh AR, Kamska V, Chandra Rajan K, Robles Malagamba MJ, Hu R, Baum D, Dean MN.   +8 more
europepmc   +2 more sources