Journal•
Journal of the Kansai Society of Naval Architects
About: Journal of the Kansai Society of Naval Architects is an academic journal. The journal publishes majorly in the area(s): Hull & Rudder. Over the lifetime, 47 publications have been published receiving 283 citations.
Topics: Hull, Rudder, Propeller, Pitot tube, Response amplitude operator
Papers
More filters
Journal Article•
TL;DR: An automatic collision avoidance system is proposed that is based on fuzzy control, which is quite similar to human control and flexible enough to adapt to unexpected environmental changes.
Abstract: An automatic collision avoidance system is proposed. The system contains parts for data acquisition from the radar signal; decision support in relation to the collision risk; speed or course change command; and a course control autopilot. All parts except data acquisition are based on fuzzy control, which is quite similar to human control and flexible enough to adapt to unexpected environmental changes.
56 citations
Journal Article•
TL;DR: In this paper, the authors investigated maneuverability and its prediction techniques for a twin-propeller, twin-rudder ship and found that ship turning and course-keeping qualities change significantly with water depth.
Abstract: Ship turning and course-keeping qualities change significantly with water depth. In previous papers, the authors presented techniques for predicting maneuvering ship motions in both deep and shallow water for a single-propeller, single-rudder ship. In this paper, maneuverability and its prediction techniques are investigated for a twin-propeller, twin-rudder ship. Results are described for captive model tests and digital simulations carried out for two different ships of this design, and the mathematical model is presented.
51 citations
Journal Article•
TL;DR: In this paper, the authors investigated the predicting techniques based on the well-known MMG's mathematical model for the prediction of maneuvering motion in shallow water, and more theoretical approaches have been desired in addition to experimental data.
Abstract: Maneuvering behavior significantly changes according to water depth. An examination of safety in harbor navigation therefore requires clarification of the characteristics of ship motion in shallow water. Following the full-scale trials of the ESSO OSAKA, many model tests were performed to observe the characteristics of hydrodynamic forces acting on hull or rudder. These hydrodynamic data are insufficient, however, for the prediction of maneuvering motion in shallow water, and more theoretical approaches have been desired in addition to experimental data. In this article, the predicting techniques are investigated based on the well-known MMG's mathematical model.
30 citations
Journal Article•
TL;DR: In this article, a new mathematical model is proposed to describe the ship motion at the slow speed involved, a model derived by simplifying a cross-flow model, which is shown to be applicable to the prediction of complicated harbor maneuvers and to maneuvers associated with single point mooring systems.
Abstract: When a ship proceeds to a berth, the captain or pilot reduces or reverses the main engine output, braking the ship's speed. He then adjusts the power of side thrusters or tugs. During the ship design stage, it is very important that the maneuverability under such conditions, in shallow water at slow forward speed, be evaluated. In connection with this need, and continuing work reported upon earlier, this article describes an investigation of steady damping forces and moment acting upon a hull. A new mathematical model is proposed to describe the ship motion at the slow speed involved, a model derived by simplifying a cross-flow model. The model is shown to be applicable to the prediction of complicated harbor maneuvers and to maneuvers associated with single point mooring systems.
21 citations
Journal Article•
TL;DR: In this paper, the authors derived a performance criterion for autopilot navigation based on the concept of energy increase due to yawing and found that the criterion is composed of two parts: elongation of sailing distance and thrust increase.
Abstract: A performance criterion of autopilot navigation is a long-discussed topic but remains still fresh. In this paper, the performance criterion is derived from the concept of energy increase due to yawing. The criterion is found to consist of two parts: elongation of sailing distance and thrust increase due to steering and yawing motions. Order from NSFI as No. 22207.
12 citations