Results 11 to 20 of about 597 (262)

Design Fuzzy Input-Based Adaptive Sliding Mode Control for Vessel Lift-Feedback Fin Stabilizers with Shock and Vibration of Waves [PDF]

open access: yesShock and Vibration, 2017
An adaptive sliding mode controller based on fuzzy input design is presented, in order to reduce the roll motion of surface vessel fin stabilizers with shock and vibration of waves.
Lihua Liang, Mingxiao Sun, Tiantian Luan
doaj   +2 more sources

Modelling, Simulation and Controller Design for Hydraulically Actuated Ship Fin Stabilizer Systems

open access: yesMATEC Web of Conferences, 2016
In general, hydraulic systems that are used for ship fin stabilizers and rudders, are modelled as first or second order of linear equations to obtain only system’s delay and overshoot for controlling purposes.
Zihnioglu Alper   +4 more
doaj   +3 more sources

Predictive Control for a Fin Stabilizer [PDF]

open access: yesJournal of Navigation and Port Research, 2007
A predictive controller can solve a control problem related to a disturbance-dominant system such as roll stabilization of a ship in waves. In this paper, a predictive controller is developed for a fin stabilizer. Future wave-induced moment is modeled simply using two typical regular wave components for which six parameters are identified by the ...
Hyeon-Kyu Yoon   +2 more
openaire   +1 more source

Defectoscopic Tests of Smoke Mortar Charges [PDF]

open access: yesProblemy Mechatroniki, 2015
There are presented selected results of defectoscopic tests on smoke charges confined in the metallic containers inserted in the bodies of 98 mm mortar bombs, using Real Time Rentegenoscopy (RTR) and infrared (IR) thermography.
Maciej Miszczak   +2 more
doaj   +1 more source

Experimental and CFD Investigation of Directional Stability of a Box-Wing Aircraft Concept

open access: yesFluids, 2022
This study aimed to explore the directional stability issues of a previously studied light box-wing aircraft model with a pusher propeller engine in the fuselage aft section.
Gueraiche Djahid   +5 more
doaj   +1 more source

Design of an Optimal Controller for the Roll Stabilization of Surface Ships with Active Fins [PDF]

open access: yesJournal of Eta Maritime Science, 2018
In this paper, an optimal controller is designed to control the undesired roll motion of a ship under the effect of sea waves by using active fin stabilizers. The roll dynamics is described by a single-degree-offreedom nonlinear model.
Mehmet Selçuk ARSLAN
doaj   +1 more source

Numerical simulation of hydrodynamic performance of hydrofoil with inner groove

open access: yesZhongguo Jianchuan Yanjiu, 2020
[Objectives] Underwater hydrofoils have the characteristics of drag reduction and energy conservation. They are often used in the design of rudder and fin stabilizers for high-performance ships.
XIE Xuesen   +3 more
doaj   +1 more source

Magnus Effects on Stability of Wraparound-Finned Missiles

open access: yesJournal of Spacecraft and Rockets, 1998
Wraparound fins are widely used as aerodynamic stabilizers for unguided missiles. Wraparound-finned configurations have more complicated flight dynamics when compared with configurations with planar fins. General linear free flight dynamic stability criteria of unguided missiles with wraparound fins are well known.
Tanrikulu, O, Mahmutyazicioglu, G
openaire   +2 more sources

A Novel Control System of Ship Fin Stabilizer Using Force Sensor to Measure Dynamic Lift

open access: yesIEEE Access, 2018
For improving the control system of traditional ship fin stabilizers, this paper presents a novel control system to solve the deviation of system feedback by using dynamic lift.
Mingxiao Sun, Tiantian Luan
doaj   +1 more source

Experimental analysis on flow around fin assisted semi SWATH [PDF]

open access: yes, 2015
Demand on High Speed Craft (HSC) is increasing due to development of inland transportation. Therefore, many analysis have been conducted to evaluate performance of this modern ship. One of the important analysis is calm water resistance test.
Farah Nadhirah
core   +2 more sources

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