نتایج جستجو برای: deck ship
تعداد نتایج: 19600 فیلتر نتایج به سال:
Aalesund University College is building the first full-size high-speed craft simulator in Norway. In preparation of the construction of the simulator there has been built a small-scale motion simulator to test the possibilities to imitate the movements of the ship. The model is based on a Stewart platform in three degrees of freedom (roll, pitch and heave). The platform deck is moved by three D...
Recent major oil-spills were tracked using observations with sufficient altitudes over the sea surface, to detect oil slick locations. For oil-spill responders, we propose a captive Unmanned Aerial System, UAS acting like a periscope over a ship or supply vessel. The system is composed of an umbilical deployed from ship deck, and there are few studies that have examined elasticity within cable ...
This paper presents a motion tracking and control system for automatically landing Unmanned Aerial Vehicles (UAVs) on an oscillating platform using Laser Radar (LADAR) observations. The system itself is assumed to be mounted on a ship deck. A full nonlinear mathematical model is first introduced for the UAV. The ship motion is characterized by a Fourier transform based method which includes a r...
Shipyard painting is most often viewed as pure ship construction operations, where the painting of the hull, deck, superstructure, and cargo spaces makes up the total effort and cost. This view may be justified when analyzing various trade production costs as parts of the total ship cost. However, parts preparation and painting costs are significant when looked at in summary as a new constructi...
A flight control design methodology for alleviating pilot workload during helicopter shipboard operations was developed and tested in simulation. The methodology uses modern MIMO control theory to improve gust rejection properties when operating in a turbulent ship airwake. The spectral properties of the airwake are identified using simulations and incorporated into the control synthesis proces...
A manned or unmanned helicopter-ship qualification program (Dynamic Interface Testing) evaluates, improves, and/or develops all aspects of shipboard helicopter compatibility. Issues addressed during a test may include the adequacy, effectiveness, and safety of shipboard aviation support facilities and helicopter recovery procedures. Manned and unmanned aircraft share a number of common issues a...
Mobile robotic manipulators can augment the strength and dexterity of human operators in unstructured environments. Here, the control system for a six degree-of-freedom heavy-lift mobile manipulator for lifting and inserting payloads on the deck of a ship is described. The robotic hardware and the application present several control challenges, including structural resonances, high joint fricti...
Landing a helicopter to the ship flight deck is most demanding even for experienced pilots and modeling simulation of ship-helicopter dynamic interface substantially challenging technical problem. In this paper, coupling numerical method was developed simulate fully coupled flow-field under complete wind-over-deck conditions. The steady actuator disk model based on momentum source approach reso...
The paper presents the experimental investigation of aerodynamic interaction between a helicopter model and ship with simplified geometry. In first phase experiment, series wind tunnel tests were carried out in order to study flow features on flight deck for several conditions, without presence helicopter. Pressure measurements Particle Image Velocimetry surveys performed assess effect velocity...
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