WO1995018742A1 - Dispositif reduisant les effets des mouvements induits par les vagues sur un bateau - Google Patents

Dispositif reduisant les effets des mouvements induits par les vagues sur un bateau Download PDF

Info

Publication number
WO1995018742A1
WO1995018742A1 PCT/NO1994/000007 NO9400007W WO9518742A1 WO 1995018742 A1 WO1995018742 A1 WO 1995018742A1 NO 9400007 W NO9400007 W NO 9400007W WO 9518742 A1 WO9518742 A1 WO 9518742A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
hull
pitch
fin
roll
Prior art date
Application number
PCT/NO1994/000007
Other languages
English (en)
Inventor
Eilev Instanes
Jens Herman Jorde
Svein P. Berge
Per Eivind Austefjord
Original Assignee
Kvaerner Fjellstrand A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kvaerner Fjellstrand A/S filed Critical Kvaerner Fjellstrand A/S
Priority to GB9613982A priority Critical patent/GB2300166B/en
Priority to PCT/NO1994/000007 priority patent/WO1995018742A1/fr
Priority to AU58680/94A priority patent/AU687029B2/en
Publication of WO1995018742A1 publication Critical patent/WO1995018742A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B39/061—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water by using trimflaps, i.e. flaps mounted on the rear of a boat, e.g. speed boat

Definitions

  • the present invention relates to a system for reducing wave- induced motions of a vessel, preferably a vessel having a displacement hull, of the kind disclosed in the preamble of claim 1.
  • a vessel will be subjected to all these motions simultaneously when it travels in a seaway, and these motions will to a greater or lesser extent cause the passengers to
  • the vertical accelerations are due in the main to pitching
  • anti-roll fins consisting of wing-shaped bodies which project out from the side of the vessel in the vicinity of the mid- section of the vessel, which, by virtue of the fact that they are rotatable and controlled by a system which registers the rolling motion of the vessel, can provide a moment of force to counterbalance the rolling motion.
  • the use the rudder of the vessel to counteract this rolling motion has also been proposed.
  • the objective of the present invention is to reduce the effect of the aforementioned forces on the vessel, also in poor weather, without having to reduce the speed of the vessel.
  • the surfaces provide dynamic forces on the vessel and can vary the angle at which they meet the water flow, and are controlled in such a way that they counterbalance the vessel's tendency to move under the stress of the waves. Not only is the pitching motion reduced, but since the heaving motion is affec.ed by the pitching motion, the heaving motion will also be reduced considerably, whilst it will also be possible to reduce the rolling motion.
  • Said surfaces create a force which is proportional to the speed of the vessel to the second power, and by virtue of the fact that the surfaces are controlled by a system which registers the motion of the vessel and thereafter transmits signals to a hydraulic system which controls the lifting force, this will to a great extent reduce the undesired motions.
  • the surfaces may either be rotatable through a transverse axis such that the angle of incidence is varied, or they may be equipped with so-called flaps placed either in the leading edge or the trailing edge of the surfaces.
  • the flaps In order to provide lift, the flaps must be rotated through an angle in relation to the rest of the surface. It is essential that such flaps are able to create both a downwardly directed force to counteract an upwardly directed motion of the bow of the vessel, and an upwardly directed force to counteract a downwardly directed motion of the vessel's bow.
  • the lifting surfaces may be located on downwardly directed struts located under the front part of the bottom of the hull, and in a catamaran or multiple-hull vessel, one on each of the hulls
  • these surfaces will be capable of counterbalancing pitching by providing forces which are directed opposite to the motion of the vessel, but by virtue of the fact that the surfaces are at such a great distance from one another thwartships, they will also be able to counteract rolling by providing a moment of force which counterbalances the rolling moment. It will also be possible to arrange these surfaces in pairs under each of the hulls on, e.g., a catamaran so that they are attached to a downwardly projecting strut placed in the front part of the bottom.
  • the surfaces will then be capable of counteracting rolling in that either the two outer surfaces provide a moment of force which is directed opposite to the rolling moment, whilst the two inner surfaces provide forces which counterbalance the pitching motion, or one pair of lifting surfaces provides an upwardly directed force whilst the other pair provides a downwardly directed force and this counterbalances the rolling motion, whilst the size of the forces relative to one another may be such that they also counterbalance the pitching motion, if this should be so desired.
  • Figure 1 is a schematic illustration of a circuit diagram of the control of the lifting surfaces with the control of a port and a starboard fin respectively.
  • Figure 2 illustrates a deta: I in the control of the lifting surfaces with accompanying fail safe system.
  • a strut projecting from the hull and which at its other end is equipped with a lifting surface in the form of a fin or having flaps provided in the leading or trailing edge of the surface.
  • the moveable part of the surface is rotatable around a transversely positioned axis .
  • a hydraulic actuator which moves the fin to the desired angle.
  • the fin is indicated schematically by means of the reference numeral 3, and the accompanying actuator 4 in this case is in the form of a piston device.
  • sensors are provided which measure the vessel's pitching angle 7 and rolling angle 16, and which emit signals which are dependent upon the angle of the vessel to the horizon.
  • a speed sensor measures the vessel's angular velocity in pitch 9 and roll 18 respectively, i.e., they emit signals which vary with the change of roll and pitch per time unit.
  • two vertical accelerometers are provided which sense the vertical acceleration 10, 19 of the vessel, and which emit signals that are dependent upon vertical acceleration. The pitch angle and the roll angle are subtracted from the desired pitch angle 14 and roll angle 15 in respective subtraction units 8, 17.
  • the degree of influence on the control of the fins of these values may be regulated by means of respective amplifiers 11, 20 from the control panel .
  • the influence of the pitch velocity 9 and the roll velocity 18 on the angular position of the fins may also be regulated via respective amplifiers 12, 21 from the control panel.
  • the pitch acceleration 10 and the roll acceleration 19 provide an influence on fin control by means of permanently set, predetermined values provided by the amplifiers 13 and 22 respectively.
  • the difference between desired pitch and actual pitch is amplified through amplifier 11. Furthermore, pitch velocity and pitch acceleration will be amplified through amplifiers 12 and 13. The summation of these three values together gives a fin angle command for pitch. The same is done for roll, and the summation of the three values gives a fin angle command for roll .
  • a pitch command is divided equally between port and starboard (a positive pitch command results in the fins exerting an upward force, i.e., they press the bow up) .
  • a positive roll angle command results in the vessel rolling over to starboard (i.e., the starboard fin -rovides a downward force whilst the port fin provides an upward force) .
  • the roll commands for the starboard and port fins therefore have opposite signs. Control of the port fin is therefore the sum of a pitch command and a roll command, whilst control of the starboard fin is the difference between the pitch and roll command.
  • Fig. 2 is a schematic illustration of the hydraulic system for actuating a guide fin 30.
  • the hydraulic system consists of a servo loop with an oil pressure unit 5 which provides the system with hydraulic oil under pressure. Furthermore, there is provided a valve block 1, 2 which controls the oil flow to and from the cylinder 4 so that the piston rod is moved up or down. Furthermore, a position indicator is provided which, in connection with the piston rod or in another manner, is coupled to the fin. The position indicator gives a signal to the servo amplifier card 6 re measured piston stroke/fin position and compares this with the desired position. If there is any discrepancy between these, the servo card gives a signal to the valve block 1, 2 which moves the fin towards the desired angle.
  • an oil accumulator 3 oil reservoir
  • the fin is pressed down so that the bow of the vessel is pressed up. It is arranged in this way to prevent the bow of the vessel from being pressed down, i.e., from coming deep in the water. If the fins draw the bow down, this will result in great water pressure caused by the wave forces which result in considerable retardation and also a loss of directional stability, which in turn leads to major changes in course, especially in a rolling sea, with a subsequent danger of large rolling motions.
  • a valve 1 ensures that the oil flow is guided to the cylinder, either from the valve block or from an accumulator 3. In a normal situation the oil flow will come from the valve block, but on the discovery of a system fault or when a power supply system fails, the valve 1 will automatically connect the oil flow to the accumulator 3, and thus the piston/fin 4 is pressed down as shown in Fig. 2. Furthermore, a manual stop valve 2 makes possible the locking of the piston/fins in a desired position.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Cookers (AREA)
  • Surgical Instruments (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

L'invention se rapporte à un système réduisant les effets des mouvements induits par les vagues sur un bateau, de préférence un bateau à coque à déplacement. Une ou plusieurs surfaces, montées sur la coque, se trouvent dans l'eau pour contrecarrer les mouvements non désirés. Ces surfaces sont montées sur des entretoises faisant saillie de la coque. Un dispositif de commande permet de modifier l'angle de la surface ou des parties de la surface par rapport à l'écoulement de l'eau. Ces surfaces sont destinées à créer des forces qui, s'amplifiant avec le temps, contribuent considérablement à déjauger le bateau. Les entretoises et les surfaces peuvent être rétractées dans la coque ou peuvent tourner à l'intérieur de celle-ci de sorte qu'elles n'aient aucun effet sur l'écoulement de l'eau lorsqu'elles ne sont pas utilisées. Le dispositif de commande comprend des détecteurs enregistrant les forces agissant sur le bateau sous forme de tangage, c'est-à-dire la rapidité du tangage et l'accélération du tangage, et de roulis, c'est-à-dire la vitesse en roulis et l'accélération en roulis. L'invention se rapporte également à des dispositifs servant à ajouter les valeurs enregistrées par les détecteurs, ces valeurs ajoutées respectives représentant une mesure de la position angulaire des ailerons respectifs par rapport au sens de l'écoulement.
PCT/NO1994/000007 1994-01-10 1994-01-10 Dispositif reduisant les effets des mouvements induits par les vagues sur un bateau WO1995018742A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9613982A GB2300166B (en) 1994-01-10 1994-01-10 Device for reduction of wave-induced motion of a vessel
PCT/NO1994/000007 WO1995018742A1 (fr) 1994-01-10 1994-01-10 Dispositif reduisant les effets des mouvements induits par les vagues sur un bateau
AU58680/94A AU687029B2 (en) 1994-01-10 1994-01-10 Device for reduction of wave-induced motion of a vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO1994/000007 WO1995018742A1 (fr) 1994-01-10 1994-01-10 Dispositif reduisant les effets des mouvements induits par les vagues sur un bateau

Publications (1)

Publication Number Publication Date
WO1995018742A1 true WO1995018742A1 (fr) 1995-07-13

Family

ID=19907744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1994/000007 WO1995018742A1 (fr) 1994-01-10 1994-01-10 Dispositif reduisant les effets des mouvements induits par les vagues sur un bateau

Country Status (3)

Country Link
AU (1) AU687029B2 (fr)
GB (1) GB2300166B (fr)
WO (1) WO1995018742A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8555734B2 (en) 2005-08-22 2013-10-15 Technology Investment Company Pty Ltd Stabilising means

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1301936A (fr) * 1961-07-11 1962-08-24 Perfectionnements aux dispositifs de stabilisation des navires
US3156209A (en) * 1962-07-06 1964-11-10 United Aircraft Corp Autopilot for hydrofoil craft
US3623444A (en) * 1970-03-17 1971-11-30 Thomas G Lang High-speed ship with submerged hulls
US3899987A (en) * 1974-04-10 1975-08-19 Boeing Co Fail-safe control system for hydrofoil craft
DE2245550B2 (de) * 1972-09-16 1977-04-07 Korotkow, Michail Michajlowitsch; Suldin, Stanislaw Nikolaje witsch; Wasin, Alexandr Iwanowitsch; Gorki (Sowjetunion) System zur automatischen stabilisierung von tragfluegelschiffen
NO157055B (no) * 1985-03-22 1987-10-05 Otto Von Ubisch Katamaranfartÿy.
WO1993000255A2 (fr) * 1991-06-26 1993-01-07 Vickers Plc Systeme de commande automatique de gain pour stabilisateur de bateau

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1301936A (fr) * 1961-07-11 1962-08-24 Perfectionnements aux dispositifs de stabilisation des navires
US3156209A (en) * 1962-07-06 1964-11-10 United Aircraft Corp Autopilot for hydrofoil craft
US3623444A (en) * 1970-03-17 1971-11-30 Thomas G Lang High-speed ship with submerged hulls
DE2245550B2 (de) * 1972-09-16 1977-04-07 Korotkow, Michail Michajlowitsch; Suldin, Stanislaw Nikolaje witsch; Wasin, Alexandr Iwanowitsch; Gorki (Sowjetunion) System zur automatischen stabilisierung von tragfluegelschiffen
US3899987A (en) * 1974-04-10 1975-08-19 Boeing Co Fail-safe control system for hydrofoil craft
NO157055B (no) * 1985-03-22 1987-10-05 Otto Von Ubisch Katamaranfartÿy.
WO1993000255A2 (fr) * 1991-06-26 1993-01-07 Vickers Plc Systeme de commande automatique de gain pour stabilisateur de bateau

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. P1921E/43, Week 8243; & SU,A,893 672 (DOBROVOLSKII S D), 5 January 1981. *
PATENT ABSTRACTS OF JAPAN, Vol. 11, No. 86, M-572; & JP,A,61 241 294 (MITSUBISHI HEAVY IND LTD), 27 October 1986. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8555734B2 (en) 2005-08-22 2013-10-15 Technology Investment Company Pty Ltd Stabilising means

Also Published As

Publication number Publication date
GB2300166B (en) 1998-04-08
GB9613982D0 (en) 1996-09-04
AU687029B2 (en) 1998-02-19
AU5868094A (en) 1995-08-01
GB2300166A (en) 1996-10-30

Similar Documents

Publication Publication Date Title
CN109367729B (zh) 一种带有水面自适应减摇装置的耐波无人船
US5163377A (en) Sailing yacht
US7743720B1 (en) Multihull hydrofoil watercraft
US20170349246A1 (en) Motorized hydrofoil device
US7182036B2 (en) Shock limited hydrofoil system
US5511504A (en) Computer controlled fins for improving seakeeping in marine vessels
US7370594B2 (en) System for reducing the roll of a boat
US5622130A (en) Heel control system for sailing yachts and sailing yacht hull
JPH0354091A (ja) 水中翼船の重心位置最適化装置
US8676412B2 (en) Reactive suspension with an integrated braking and steering system for a boat
US20030029370A1 (en) Powered boat hull
US3689953A (en) Stabilized floating structure
NO773512L (no) Anordning ved katamaraner.
US2960960A (en) Paravane
EP3475155B1 (fr) Hydroptère
US5988097A (en) Watercraft stabilized by controlled hydrofoil elevation
US4827862A (en) Aerodynamic control system for high speed motorboats
AU687029B2 (en) Device for reduction of wave-induced motion of a vessel
US3213818A (en) Hydrofoil watercraft
US3800727A (en) Automatic landing system for hydrofoil craft
US3199484A (en) Load-alleviator hydrofoil unit for watercraft
US5008863A (en) Low noise sonar support system
US3146457A (en) Automatic control systems for hydrofoils
JP2023526852A (ja) 可変形状を備えた船体
US5111766A (en) Sea wing

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR BY CA CH CN CZ DE DK ES FI GB HU JP KP KR KZ LK LU LV MG MN MW NL NO NZ PL PT RO RU SD SE SK UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA