KR20160148929A

KR20160148929A - Apparatus for controlling posture of FFL using gyro effect

Info

Publication number: KR20160148929A
Application number: KR1020150085740A
Authority: KR
Inventors: 김성종; 장창환; 전석희
Original assignee: 대우조선해양 주식회사
Priority date: 2015-06-17
Filing date: 2015-06-17
Publication date: 2016-12-27
Also published as: KR101777594B1

Abstract

The present invention relates to a device for adjusting a posture for free fall lifeboat (FFL) (10) entering the water. To this end, the device comprises: a gyro structure (20) having a rotor (23) and a case (22) on a frame (21) so that a reaction force takes effect by being mounted on the lifeboat (10); and a controller (40) inducing the reaction force of the gyro structure (20) in response to postural modification of the lifeboat (10). According to the present invention, even if the FFL installed on maritime structures is on a wrong posture, it is possible to prevent breakage of ships, and injuries due to impact is avoided, by stably maintaining the posture of the lifeboat (10) in the course of falling and entering the water as well as salvaging the injuries.

Description

[0001] The present invention relates to an FFL using gyro effect,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a posture control of a lifeboat, and more particularly, to a posture control device of a FFL using a gyro effect to stably maintain an intake posture of a lifeboat installed in an offshore structure.

Free Falling Lifebaoat (FFL) means a lifeboat for people who reside in offshore structures to quickly escape from free-fall mode without external energy sources in emergency situations. However, when the FFL is free-falled, the posture may be distorted. However, according to the conventional method, there is no such preparation.

Korean Prior Art Document No. 2010-0082565 (Prior Document 1) and Korean Patent Registration No. 1476104 (Prior Document 2) are known as prior art documents which can be referred to in this connection.

The prior art document 1 discloses a gimbal motor comprising a base block fixed to a hull of a ship, a gimbal motor fixed to the base block and having a gimbal axis, a spin motor coupled to a gimbal axis of the gimbal motor and rotated about a pitch axis, A gyroscope for roll axis control, which is constituted by a wheel or the like which generates a moment and is restrained from shaking with respect to the roll axis of the ship; And a controller for controlling operation of the roll axis controlling gyroscope. As a result, it is expected to improve the vibration damping performance while greatly reducing the overall size.

The preceding document 2 shows a hull floating on the sea by buoyancy; A horizontal holding device installed at each of four corners of the hull and generating a vibration suppressing moment corresponding to the swing of the hull; A tilt detector installed at one side of the horizontal holding device and measuring a tilt of the hull; And a control unit for respectively controlling the operation of the horizontal holding unit in accordance with the value detected by the tilt detecting unit. Accordingly, it is expected that the effect of maintaining the balance of the hull can be maintained not only during sea pumping but also during movement.

However, according to the above-mentioned prior art, in the process of launching a free-fall lifeboat in an emergency, the posture is stably maintained in a set range, which limits the utilization as a control technique for mitigating the impact.

1. Korean Patent Publication No. 2010-0082565 "Ship stabilization device" (Open date: July 19, 2010) 2. Korean Patent Registration No. 1476104 entitled " Barge with horizontal holding device and its control method "(Open date: December 23, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art, and to provide a method of minimizing shocks by stably maintaining the launch posture of a free-fall lifeboat even when the attitude of the FFL is changed due to tilting, And to provide an apparatus for controlling posture of FFL using gyro effect.

In order to achieve the above object, the present invention provides an apparatus for adjusting a posture in which a free-fall type lifeboat is received, the apparatus comprising: a gyro structure mounted on the lifeboat and having a case and a rotor on a frame for applying reaction force; And a controller for causing a reaction force of the gyro structure to correspond to the attitude change of the lifeboat.

As a first embodiment of the present invention, the gyro structure is characterized by comprising a Z-football synchronous motor for rotating the frame on the Z-axis, and an X-football synchronous motor for rotating the case on the X-axis.

As a detailed configuration of the present invention, the Z-football sync is rotated at a right angle when the life posture is compensated for the rolling posture so that the X-football sync is acted as Y-football sync.

As a second embodiment of the present invention, the gyro structure includes a gimbal rotatably installed between the frame and the case, an X-football synchronous motor for rotating the gimbal on the X-axis, and a Y-football synchronous motor for rotating the case on the Y- .

In a detailed configuration of the present invention, the controller is provided with a sensor section for detecting the attitude of the lifeboat, a control section for mounting and executing a predetermined control algorithm, and a drive section for applying an output of the control section to the gyro structure.

As described above, according to the present invention, even if the posture of the FFL installed on an offshore structure or the like is changed, the posture can be stably maintained until the lifeboat falls, arrives and floats, thereby preventing the occurrence of injury and damage to the ship .

1 is a schematic view schematically showing an apparatus according to a first embodiment of the present invention;
Fig. 2 is a schematic diagram showing the pitching attitude variation by the apparatus of Fig. 1
Fig. 3 is a schematic diagram showing the rolling posture variation by the apparatus of Fig. 1
4 is a schematic view schematically showing an apparatus according to a second embodiment of the present invention;
Fig. 5 is a schematic diagram showing the rolling and pitching attitude variation by the apparatus of Fig. 4

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention proposes a device for adjusting the attitude of the lifeboat (10) of a free-fall type. Universal free-fall lifeboats (FFLs) are installed on offshore structures to facilitate rapid and safe evacuation of personnel in the event of an emergency such as a fire. However, if the offshore structures are tilted and damaged, if the attitude (angle) of the lifeboat is set at the time of launching, there is a great possibility of damage to human life and hull.

The present invention is a structure in which the gyro structure 20 is mounted on the lifeboat 10 and has a case 22 and a rotor 23 on a frame 21 so as to exert a reaction force. The gyro structure 20 is based on the gyro effect of the flywheel rotor 23 used for posture control of an artificial satellite or the like. The frame 21 of the gyro structure 20 is mounted on a bow or the like of the lifeboat 10 and the case 22 rotatably supporting the rotor 23 is rotatably received in the frame 21. [ Here, 'pivoting' refers to a state of rotating in a small angle range as compared to 'rotation', but does not require a clear distinction. In this manner, the gyro structure 20 is connected to the main driver 33 to cause a car wash motion of the flywheel rotor 23 rotating at a high speed.

At this time, a method of controlling the posture in the water and the water together with the fall of the FFL is implemented in the two embodiments of FIGS. 1 and 4 as described later.

In addition, according to the present invention, the controller (40) is characterized by a structure that generates a reaction force of the gyro structure (20) in response to the attitude change of the lifeboat (10). The controller (40) causes a reaction force (moment) due to the carcass movement of the gyro structure (20) in controlling the pitching and rolling of the lifeboat (10) to be dropped. Referring to FIG. 1, pitching refers to rotation about the Y axis, and rolling refers to rotation around the X axis. The detailed configuration and operation of the controller 40 is described below.

The gyro structure 20 includes a Z-axis synchronizing motor 36 for rotating the frame 21 on the Z-axis 26 and a Z-axis synchronizing motor 36 for rotating the case 22 on the X- And an X-axis synchronizing signal generator (34). In Fig. 1, the frame 21 is rotatably mounted to the lifeboat 10 via a Z-axis 26. Fig. At the lower end of the Z-axis 26, there is provided a Z-football synchronism 36 which causes the frame 21 to rotate. The case 22 is rotatably mounted on the frame 21 via an X-axis 24. [ At one end of the X-axis 24, there is provided an X-football synchronism 34 that causes the case 22 to rotate. Since the X-football synchronism 34 and the Z-football synchronism 36 do not require high precision in the rotation control, a deceleration motor can be used.

2, when the normal intake angle formed by the hull in the direction of the length (X axis) of the lifeboat with respect to the sea surface is θ and pitch posture compensation by φ is required by tilting of the offshore structure, The kick motion of the rotor 23 causes a kickback moment M in the direction of the Y axis 25 orthogonal thereto and acts on the reaction force. In other words, the reaction force at this time lowers or raises the lifeboat player to maintain a proper pitch posture.

3, when the normal intake angle formed by the hull in the width (Y-axis) direction of the lifeboat with respect to the sea surface is O [theta] with respect to the vertical line, the yaw axis rotation moment My Thereby causing a reaction force Mx in the X-axis direction to act as a reaction force. That is, the reaction force at this time lowers or raises the port side (or starboard) of the lifeboat to maintain a proper rolling posture. However, in the first embodiment of the present invention, only the X-football synchronism 34 and the Z-football synchronism 36 are provided and the Y-football synchronism 35 is excluded.

The Z-football synchronism 36 is rotated at a right angle when the lifeboat is to be compensated for a rolling posture so that the X-football synchronism 34 acts as a Y-football synchronism 35. [ The X axis 24 and the X football synchronization unit 34 are converted to the Y axis 25 and the Y football synchronization unit 35 when the frame 21 is rotated 90 degrees by the Z football synchronization unit 36 as shown in FIG. This is implemented by software control by the controller 40 without changing the hardware configuration.

As described above, according to the first embodiment of the present invention, the tilted state of the offshore structure is grasped in advance, and either the pitching attitude or the rolling attitude of the lifeboat 10 is selected to perform the compensation of FIG. 2 or FIG.

The gyro structure 20 includes a gimbal 31 and a gimbal 31 that are rotatably installed between the frame 21 and the case 22 so as to rotate on the X axis 24, And a Y-football synchronizing unit (35) for rotating the case (22) on the Y-axis (25). This takes into consideration the case where the pitching posture or the rolling posture of the lifeboat 10 is compensated simultaneously because the inclined state of the offshore structure is complicated. The wobble motion of the flywheel rotor 23 is transmitted to the frame 21 through the Z axis 26, the case 22, the Y axis 25 gimbals 31, and the X axis 24. Since the X-football synchronism 34 and the Y-football synchronism 35 of the second embodiment need to be precisely controlled at the same time, a servo motor is preferable. On the other hand, the second embodiment can exclude the Z-football synchronism 36 of the first embodiment.

At this time, basically, the pitching attitude and the rolling attitude compensation of the lifeboat are carried out on the same principle as in Figs. 2 and 3 described above. When the X-axis direction moment Mx is generated by rotating the gimbal 31 with the X-axis synchronizing motor 34 during the pitching posture correction, a moment My in the Y-axis direction is generated to generate a reaction force in the length do. When the Y-axis direction moment My is generated by rotating the case 22 by the Y-axis synchronizing means 35 during the rolling posture compensation, a moment Mx in the X-axis direction is generated to generate a reaction force in the width direction do. FIG. 5 shows that the pitch posture compensation of angle? And the rolling posture compensation of angle? Are simultaneously performed.

The controller 40 includes a sensor unit 42 for detecting the attitude of the lifeboat 10, a control unit 44 for mounting and executing a predetermined control algorithm, a controller 44 for controlling the gyro structure 20, And a driving unit (46) for applying an output of the driving unit (44). The sensor unit 42 generates a signal corresponding to the inclination of the lifeboat by using a gyro sensor. The control unit 44 includes a microprocessor, a memory, and a microcomputer circuit equipped with an I / O interface. The driving section 46 applies power for the operation of the X-football synchronizing circuit 34, the Y-football synchronizing circuit 35 and the Z-football synchronizing circuit 36. [

In operation, the controller 40 inputs a signal of the sensor unit 42 in the process of getting after the lifeboat has fallen and floated in water, and inputs the signal of the X-football 34 and the Y- ), And the Z-football synchronous motor (36). Since the lifeboat is launched in a normal posture, the risk of damage to the hull as well as the passengers aboard is significantly reduced.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: Lifeboat 20: Gyro structure
21: Frame 22: Case
23: rotor 24: X axis
25: Y axis 26: Z axis
31: gimbals 33: main driver
34: X soccer motive 35: Y soccer mot
36: Z-football synchronizer 40: controller
42: sensor unit 44: control unit
46:

Claims

An apparatus for adjusting the attitude of a free-fall type lifeboat (10)
A gyro structure (20) mounted on the lifeboat (10) and having a case (22) and a rotor (23) on a frame (21) so as to exert a reaction force; And
And a controller (40) for generating a reaction force of the gyro structure (20) in response to the attitude change of the lifeboat (10).

The method according to claim 1,
The gyro structure 20 includes a Z-football synchronous motor 36 for rotating the frame 21 on the Z-axis 26 and an X-axis synchronous motor 34 for rotating the case 22 on the X- And a control unit for controlling the posture of the FFL using the gyro effect.

The method of claim 2,
The Z-football synchronizer (36) rotates at a right angle when the lifeboat is compensated for a rolling posture to cause the X-football synchronizer (34) to act as a Y-football synchronizer (35).

The method according to claim 1,
The gyro structure 20 includes a gimbal 31 that is rotatably installed between the frame 21 and the case 22, an X-axis synchronous motor 34 that rotates the gimbal 31 on the X- And a Y-football synchronizing unit (35) for rotating the Y-axis driving unit (22) on the Y-axis (25).

The method according to claim 1,
The controller 40 includes a sensor unit 42 for detecting the attitude of the lifeboat 10, a control unit 44 for mounting and executing a predetermined control algorithm, a control unit 44 for applying an output of the control unit 44 to the gyro structure 20 And a driving unit (46) for controlling the posture of the FFL using the gyro effect.