China
Africa
Explore chapters and articles related to this topic
An Overview of Applied Control Engineering
Published in Cheng Siong Chin, Computer-Aided Control Systems Design, 2017
The ship control system is designed to control a vessel on a desired heading (or heading control) while subjected to disturbances such as waves and wind. The main components of the ship control system can be seen in Figure 1.5. The actual heading is measured by a magnetic compass and compared with the desired heading. The ontroller determines the commanded rudder angle and sends a control signal to the steering gear to steer the ship. The actual rudder angle is measured by an angle sensor and compared with the desired rudder angle, to form a control loop. The rudder gives a moment on the hull to change the actual heading toward the desired heading under the wind and wave disturbances that may hinder the control efforts.
Ship Handling: Equipment
Published in David House, Seamanship Techniques, 2019
The rudder stock and all pivot points (pintles turn in gudgeons), including the bearing pintle, lie on a straight line axis. It is no longer used for large constructions because of alignment problems, but is occasionally seen on smaller vessels – coastal barges and the like. The rudder is defined as being ‘unbalanced’ because the whole of the surface area is aft of the turning axis.
Material quality effects on structural design of rudder horns for bulk carriers and tankers
Published in Ships and Offshore Structures, 2020
K. Tsevdou, P. Contraros, E. Boulougouris
Rudders can be classified according to the position of the stock (unbalanced, semi-balanced, or balanced) or the structural rudder – hull connection (the number of pintles, without skeg, semi-skeg, or full-skeg) (Liu and Hekkenberg 2017). According to Molland and Turnock (Molland AF, Turnock SR, 2007), rudder type choice depends on the ship type, the size of the ship, the shape of the stern, and the require rudder size. This paper presents a study on a semi-balanced rudder, which is the most commonly used in bulk carriers and tankers and reports an assessment of its strength, deflections and fatigue life, and the effects of using 4 different types of steel.
An overview of wire arc additive manufacturing (WAAM) in shipbuilding industry
Published in Ships and Offshore Structures, 2021
In addition to current applications of WAAM, there are also some other parts of ship for production of which WAAM can be a promising alternative solution to traditional methods. The rudder is used to navigate and manoeuvre the ship and located at the stern behind the propeller to produce a transverse force and steering moment (see Figure 16).