JP2000072081A - Hull attitude control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a stable high-speed cruise in any cruise state by providing a rear rudder at the rear of a ship bottom, and providing a front rudder and both the right and left hydrofoils changing the trim and the right of left tilt of a hull at the front respectively. SOLUTION: A front rudder 13 and a rear rudder 14 are individually driven by the pressure of a hydraulic pump or a pneumatic pump via auxiliary machines such as gears. Right and left hydrofoils 11, 12 are fitted to a ring via flanges located on both sides of the front of a ship bottom. When the rotational angles of the hydrofoils 11, 12 are changed, the trim indicating the draft difference between the bow and stern of a hull is changed. The direction of the right and left hydrofoils 11, 12 is made optional, however the ship can be turned to the right at a higher speed when they are set horizontal. When the ship is cruising with the hull tilted to the right, the right hydrofoil 11 is set upward, the left hydrofoil 12 is set downward to serve as a ballast foil, and the rightward tilt of the hull is corrected. In the high-speed straight cruise state, the right and left hydrofoils 11, 12 are set upward to float the whole hull, and the water drag of the hull is reduced to allow a high-speed cruise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull attitude control apparatus, and more particularly to an apparatus for controlling a hull attitude in order to perform stable navigation when a boat such as a high-speed boat turns.

[0002]

2. Description of the Related Art Japan is surrounded by the sea, and its connection with the sea is indispensable in terms of history and economics from the viewpoint of logistics and the like. Despite the development of air transportation capacity, its transportation capacity is limited, and it is necessary to rely on sea transportation. At the same time, speeding up of this sea transportation is also desired, and hydrofoils, jet foils and techno super liners equipped with new propulsion are being developed. Further, an automatic hull attitude control system (AC
S: Automatic Control System
m) has been proposed. For example, in the case of a jet foil, for example, a combination of a rudder and a flap of a front wing and a rear wing performs a balancing turn called a back turn to control a hull attitude.

[0003]

However, in the automatic hull attitude control system of these high-speed boats, since the turning is performed only by the combination of the rudder and the flap of the front wing and the rear wing as described above, small turning is not possible. Even so, I had to slow down to prevent the hull from tilting too steeply. After all, high speed navigation could not be performed while maintaining stable navigation.

The present invention has been made to solve these problems, and an object of the present invention is to provide a hull attitude control device capable of performing stable high-speed navigation under any navigation conditions such as high-speed turning. Aim.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a rear rudder for rear steering at the rear bottom of a boat, a front rudder and trim for front steering at a front bottom of the boat, and a hull. The feature is that each of the left and right wing hydrofoils that change the inclination of the left and right is provided. Therefore, according to the present invention having such a configuration, it is possible to perform a stable navigation even in the case of rolls caused by waves or rolling, and also to perform high-speed turning in an emergency or the like stably without decreasing the speed. Can be done with

Further, the turning direction and angle of each of the rear rudder and the front rudder, the right hydrofoil and the left hydrofoil are controlled based on the navigation speed, the hull inclination due to rolling and pitching, and the turning angle of the steered wheels. Thus, fine hull attitude control that can be finely adjusted in accordance with all navigation conditions can be performed.

Further, when the hull is tilted by rolling, the tilt can be reduced by turning the hydrofoil on the inclined side upward and the other hydrofoil downward, or the right hydrofoil and the left hydrofoil can face upward for high-speed navigation. Stable navigation is possible by making both the right hydrofoil and the left hydrofoil downward.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A rear rudder for rear steering is provided at the rear of the bottom of a boat, and a front rudder for front steering and a hydrofoil for left and right wings for changing the left and right inclinations of the trim and the hull are provided at the front of the bottom of the boat. Was.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view schematically showing an entire hull on which a hull attitude control device according to one embodiment of the present invention is mounted. 2A is a right side view, FIG. 2B is a bottom view, FIG. 2C is a left side view, and FIG. 2 is a front view. The automatic hull attitude control device according to the present invention shown in each figure includes a right hydrofoil 1
1, a left hydrofoil 12, a front rudder 13 and a rear rudder 14. Further, the front rudder 13 and the rear rudder 14 are axially movable in the left-right direction corresponding to the turning angles of the steered wheels 45 of the steering room 51 shown in FIG.

The driving of the front rudder 13 and the rear rudder 14 is individually performed by a hydraulic pump or a pneumatic pump through a replenisher such as a gear. Further, as shown in FIGS. 2 and 3, the right hydrofoil 11 and the left hydrofoil 12 are located on both sides of the front part of the bottom of the ship, and are provided with a ring 31 shown in FIG. The trim indicating the draft difference between the bow and stern of the hull changes when the rotation angle of each hydrofoil changes. Further, each of the right hydrofoil 11 and the left hydrofoil 12 is individually driven by a pressure of a hydraulic pump or a pneumatic pump via a replenisher such as a gear.

FIG. 4 schematically shows a mechanical mechanism for driving the rotation of each hydrofoil in FIG. In FIG.
1 is attached to the flange 31 of FIG. 3 and connected to the hydrofoil. Therefore, rotating the ring 41
Each hydrofoil will be rotated. A beveled rotary is provided around the circumference of the ring 41, and a gear meshing with the rotary is provided.

The gears move via the crossed shafts, and each of the shafts is attached to each end of the cylinder 42. The cylinder 42 is moved by a hydraulic pump 43. Therefore, the movement of the cylinder 42 moves each shaft, so that the gear moves and the bevel tooth rotary of the ring 41 meshing with the gear rotates, and the hydrofoil attached to the ring 41 pivots.

Next, FIG. 5 schematically shows a steering room of a boat.
In the figure, the steered wheels 51 are connected to the front and rear rudder via a stern steering wheel, a stern steering connector, a stern steering gear, a clutch, a drive mechanism using a hydraulic pump, and the like. Also, the turning angle of the steered wheels 51 is
It is detected by an angle sensor or the like (not shown) and supplied to the hull attitude control unit.

The hull attitude control unit converts the input steering angle information of the steered wheels 51, the speed information, the inclination information relating to the rolling angle and the pitching angle of the hull measured and input using the gyro, and the like. Based on the right hydrofoil 1
1. The operation control of the left hydrofoil 12, the front rudder 13 and the rear rudder 14 is automatically performed, and eventually the attitude control of the hull is performed.

Further, a right hydrofoil 11, a left hydrofoil 12, a front rudder 13 and a rear rudder 1, which are the hull attitude control devices according to the present embodiment.
The direction of 4 changes according to the navigation situation of the boat. This is shown in FIG. As shown in the figure, in the case of the navigation situation A in which a high-speed right turn is performed, the front rudder 13 is turned right, the rear rudder 14 is turned left, and the directions of the right hydrofoil 11 and the left hydrofoil 12 are arbitrary and are preferable. Can turn right more quickly if it is horizontal. In the case of the navigation situation B in which the vehicle travels diagonally right, the front rudder 13
The right hydrofoil 11 and the left hydrofoil 12 are also arbitrary in this case. On the other hand, in the case of the navigation condition C in which the hull is leaning rightward, the right hydrofoil 1
1 is directed upward, while the left hydrofoil 12 is directed downward so that the left hydrofoil 12 is made a ballast wing to correct the inclination by levitation of the right hull. In addition, the navigation situation D for performing high-speed straight navigation
In the case of (1), both the right hydrofoil 11 and the left hydrofoil 12 are directed upward to float the entire hull, thereby reducing the water resistance of the hull, thereby enabling further high-speed navigation. The navigation conditions C, D
In both cases, the directions of the front rudder 13 and the rear rudder 14 are arbitrary.
Next, in the case of navigating in a state where the left and right hydrofoil and the bottom of the ship have no resistance, that is, in the navigation situation E in which straight forward normal navigation is performed, the right hydrofoil 11 and the left hydrofoil 12 are horizontal, the front rudder 13 and the rear rudder 14 The direction is straight ahead. Note that under the condition of the navigation condition E, the right turn and the left turn by the normal navigation can be performed by changing the direction of only the rear rudder 14. Further, in the case of the navigation situation F in which more stable navigation is performed, both the right hydrofoil 11 and the left hydrofoil 12 are directed downward, and each hydrofoil functions as a ballast wing to enable stable navigation. Further, in the case of the navigation situation G in which the hull is sloping to the left, the right hydrofoil 11 is turned downward while the left hydrofoil 12 is turned upward.
Is a ballast wing, and the inclination is corrected by the floating of the left hull. In the case of the navigation conditions F and G, the front rudder 13
The direction of the rear rudder 14 is arbitrary. Next, in the case of the navigating situation H in which the vehicle travels diagonally to the left, both the front rudder 13 and the rear rudder 14 are directed to the left, and in this case also, the directions of the right hydrofoil 11 and the left hydrofoil 12 are arbitrary. In addition, the navigation situation I for high-speed left turn
In this case, the front rudder 13 is directed leftward and the rear rudder 14 is directed rightward, and the directions of the right hydrofoil 11 and the left hydrofoil 12 are arbitrary.
The angle of each direction of the right hydrofoil 11, the left hydrofoil 12, the front rudder 13 and the rear rudder 14 is determined by the degree of each navigation condition or the turning angle information of the steered wheels 51, the speed information, and the gyro as described above. It shall be set in accordance with measured and input inclination information relating to the rolling angle and pitching angle of the hull.

Although the above embodiment has been described using the drive mechanism of the hydraulic or pneumatic pressure system, the invention is not limited to this, and a mechanical system such as a gear or a wire may be used. Further, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications and substitutions can be made within the scope of the claims.

[0017]

As described above, according to the present invention,
By providing a rear rudder for rear steering at the rear of the bottom of the boat, a front rudder for front steering at the front of the bottom of the boat, and a hydrofoil for both the left and right wings to change the trim and the left and right inclination of the hull, Stable navigation can be performed even when rolling due to rolling, and high-speed turning in an emergency or the like can be performed stably at high speed without lowering the speed.

Further, by controlling the turning direction and angle of each of the rear rudder and the front rudder, the right hydrofoil and the left hydrofoil based on the navigation speed, the hull inclination by rolling and pitching, and the turning angle of the steered wheels. It is possible to perform fine hull attitude control that is finely adjusted according to every navigation situation.

Further, when the hull is inclined by rolling, the inclination can be reduced by turning the hydrofoil on the inclined side upward and the other hydrofoil downward, or the right hydrofoil and the left hydrofoil can both be raised for high speed navigation. Stable navigation is possible by making both the right hydrofoil and the left hydrofoil downward.

[Brief description of the drawings]

FIG. 1 is a view schematically showing an entire hull on which a hull attitude control device according to an embodiment of the present invention is mounted.

FIG. 2 is a front view of FIG.

FIG. 3 is a partial side view schematically illustrating a front rudder portion of the hull attitude control device of the present embodiment.

FIG. 4 is a diagram schematically illustrating a drive mechanism of a hydrofoil.

FIG. 5 is a view schematically showing a steering room of a boat.

FIG. 6 is a diagram showing an operation state of the hull attitude control device according to the present embodiment corresponding to a navigation situation.

[Explanation of symbols]

 11 Right hydrofoil 12 Left hydrofoil 13 Front rudder 14 Rear rudder 31 Flange 41 Ring 42 Cylinder 43 Hydraulic pump 51 Steering wheel

Claims (5)

[Claims] 1. A rear rudder for rear steering at the rear of the bottom of a boat, a front rudder for front steering at the front of the bottom of the boat, and a hydrofoil for left and right wings for changing the inclination of the trim and the hull. A hull attitude control device, characterized in that: 2. The turning direction and angle of each of the rear rudder and the front rudder, the right hydrofoil and the left hydrofoil are controlled based on the navigation speed, the hull inclination due to rolling and pitching, and the turning angle of the steered wheels. The hull attitude control device according to claim 1. 3. The hull attitude control device according to claim 1, wherein when the hull is tilted left or right, the hydrofoil on the inclined side is directed upward and the other hydrofoil is directed downward. 4. The hull attitude control device according to claim 1, wherein both the right hydrofoil and the left hydrofoil face upward when performing high-speed navigation. 5. The hull attitude control device according to claim 1, wherein both the right hydrofoil and the left hydrofoil are turned downward when performing stable navigation.