KR20160009393A - Ship superstructure using a dynamic actuator for vibration reduction apparatus and method - Google Patents

Abstract

The present invention relates to a vibration reducing apparatus of a ship superstructure using a dynamic actuator and a method thereof, which can secure comfort of crewmen by minimizing vibration generated at a place (for example, ship superstructure) where the crewmen stay for a long time in the ship. The vibration reducing apparatus of the present invention comprises: a vibration measurement unit which measures multi-direction vibration delivered to a vibration control target; a control unit which extracts amplitude and phase of vibration of each direction measured by the vibration measurement unit, and outputs a vibration cancelling signal having the same amplitude of an opposite direction to the extracted amplitude and the extracted phase of the vibration; and a vibration cancelling unit which cancels the generated vibration by vibrating the vibration control target along an opposite direction according to the vibration cancelling signal output from the control unit. The vibration reducing apparatus removes the generated vibration, by vibrating the vibration control target with the same amplitude as the generated vibration in the opposite direction to the generated vibration, after measuring the vibration in a vertical direction, a length direction and a width direction generated by an external excitation force.

Description

Technical Field [0001] The present invention relates to a vibration damping device for a ship, which uses a dynamic actuator,

[0001] The present invention relates to vibration damping of a ship using a dynamic actuator, and in particular, to minimize the vibration generated at a place where a crew is staying for a long time (for example, a ship dwelling) And more particularly, to a vibration damping device for a ship dwell using a dynamic actuator and a method thereof.

In addition to vertical and horizontal vibrations, horizontal vibrations, and torsional vibrations, the ship also has a combination of vibration caused by the propulsion shaft system and the propulsion machinery. In particular, ships have inherent vibration characteristics and are excited by the excitation force generated from the propulsion machinery. If the frequency of the exciting force applied to the ship is close to or equal to the natural frequency of the ship, transient vibration due to resonance will occur.

In addition, the residence area of the ship is a space for the work and rest of the crew, and the influence of the vibration must be minimized so that the crew can live in a comfortable and pleasant environment. For such a pleasant environment, various methods for reducing vibration are used in a ship, and a dynamic damper for absorbing vibration is used.

The dynamic damper is a device for reducing vibration of a target object by attaching a small spring-mass system to a vibrating body such as a machine or a structure and vibrating instead. In general, the dynamic damper reduces vibration to a specific frequency. In the event of excessive vibration due to resonance in the local structure of the residential area, the dynamic damper is installed to reduce the vibration of the residential area.

Conventional techniques for reducing vibration using a dynamic damper are disclosed in Patent Document 1, Korean Patent Laid-open Publication No. 10-2009-0016948 (2009.2.18. Published), and Korean Patent Laid-Open Publication No. 10 -2004-0049095 (published on Jun. 11, 2004).

Patent Document 1 discloses a variable dynamic absorber for a vehicle having a mounting bracket, in which a heating wire is provided to rubber, a heating wire is connected to a heater unit, and the rubber is heated to adjust the frequency. Therefore, it is expected that the vibration and noise will be reduced in accordance with the frequency at which the resonance occurs according to the engine power.

Patent Document 2 discloses a non-linear rubber which is provided on an upper portion and a lower portion of a plate for clamping the damper, a non-linear rubber having a Ks value changed according to the displacement, a mass member provided on the upper and lower portions of the rubber, And a fastening member for fastening the mass member integrally. It is expected that the convenience of the test will be improved, the development period will be shortened, and the cost will be reduced.

Korean Patent Publication No. 10-2009-0016948 (published on February 18, 2009) Korean Patent Publication No. 10-2004-0049095 (published on Jun. 11, 2004)

However, when there are a plurality of resonance frequency bands, there is a problem in that a large number of dynamic dampers capable of resonating at the frequency are required. However, since there is not enough room in the dwelling area, There is a disadvantage that optimal vibration reduction is difficult.

In addition, the conventional techniques are implemented so as to correspond only to a specific resonance frequency, which is disadvantageous in that it can not cope with a change in the resonance frequency due to a change in engine speed (RPM) during ship operation.

An object of the present invention is to solve the above-mentioned problems in the prior art, and it is an object of the present invention to minimize the vibration generated at a place where a crew is staying for a long time (for example, And to provide a vibration damping apparatus for a ship dwelling using the dynamic actuator and a method thereof.

It is another object of the present invention to provide a ship structure that is capable of realizing a floating structure and capable of canceling vibrations by generating the same vibration (phase and magnitude same as the phase and magnitude of generated vibration) A vibration damping device for a ship dwell using a dynamic actuator, and a method therefor.

In order to achieve the above object, a vibration damping apparatus for a ship dwelling using the dynamic actuator according to the present invention comprises vibration measuring means installed on an upper part of a deckhouse to measure vibrations in multiple directions. Control means for extracting vibration magnitude and phase in each direction measured by the vibration measurement means and outputting a vibration cancellation signal having the same magnitude in the opposite direction to the extracted vibration magnitude and phase; And vibration canceling means for canceling vibration generated by vibrating the vibration control object in a direction opposite to the vibration direction in accordance with the vibration cancel signal outputted from the control means.

The vibration measuring means measures vibrations in the vertical direction, the longitudinal direction and the width direction generated by the external excitation force.

The vibration measuring means may include a first vibration measuring sensor for measuring a vibration in a vertical direction generated by an external excitation force; A second vibration measurement sensor for measuring vibration in the longitudinal direction generated by the external vibration force; And a third vibration measurement sensor for measuring a vibration in the width direction generated by an external vibration force.

The control unit may include: a parameter extracting unit that extracts a vibration magnitude and a phase from the measurement signal measured by the vibration measuring unit; A vibration recognition unit for recognizing the vibration magnitude and phase extracted by the parameter extraction unit; And a vibration cancellation signal generator for generating a vibration cancellation signal having the same magnitude and phase as the extracted vibration magnitude under the control of the vibration recognition unit.

The vibration cancellation signal generator may include a first vibration cancellation signal generator for generating a vertical vibration cancellation signal for vertical vibration; A second vibration canceling signal generator for generating a length vibration canceling signal for longitudinal vibration; And a third vibration cancel signal generator for generating a width vibration cancel signal for vibration in the width direction.

Wherein the vibration cancellation means includes a width reinforcing member that generates vibration in the width direction; A vertical stiffener installed on the width stiffener to generate vibration in a vertical direction; A longitudinal stiffener provided on the vertical stiffener to generate vibration in the longitudinal direction and to seat the vibration control object; And a dynamic actuator for vibrating the width stiffener, the vertical stiffener and the longitudinal stiffener in a direction opposite to the generated vibration.

Wherein the dynamic actuator includes a pump for varying a fluid amount corresponding to a magnitude of a vibration cancel signal generated by the control means; An accumulator for temporarily storing the fluid supplied by the pump or removing the fluid when the pump is generated; And a cylinder for moving the piston rod back and forth with fluid supplied from the pump or the accumulator.

In order to achieve the above object, the present invention provides a vibration damping method for a ship dwelling using dynamic actuators, comprising the steps of: (a) measuring vibrations in an angular direction of a cabin in which a vibration control object is installed; (b) extracting a vibration magnitude and a phase in the measured directions, and outputting the vibration magnitude and phase in the vibration magnitude and phase having the same magnitude in the opposite direction to the extracted magnitude and phase; and (c) canceling the vibration generated by vibrating the vibration control object in a direction opposite to the vibration direction in accordance with the output vibration cancel signal.

Also, a method for reducing oscillation of a rack housing using a dynamic actuator according to the present invention includes the steps of: (d) measuring vibration in each direction of the vibration control object after the step (c); (e) comparing the measured vibration value of the vibration control object with a predetermined reference vibration value to determine a vibration attenuation state of the vibration control object; (f) determining that the vibration of the vibration control object is canceled when the vibration detection value is smaller than the reference vibration value as a result of the comparison in the step (e), and maintaining the current vibration control state do.

Wherein the step (e) includes the steps of: (e1) comparing a vertical vibration detection value of the vibration control object with a preset vertical reference vibration value; (e2) comparing the longitudinal vibration sensing value of the vibration control object with a preset longitudinal vibration reference value; (e3) comparing the widthwise vibration detection value of the vibration control object with a preset reference vibration value in the width direction.

According to the present invention, there is an advantage that the comfort of the crew can be secured by minimizing the vibration generated at a place where the crews stay in the ship for a long time (for example, a ship residence). Particularly, it is possible to ensure a comfortable working environment and a living environment of the crew due to the minimization of vibration as described above, thereby securing foreign competitiveness and achieving customer satisfaction.

In addition, according to the present invention, there is an advantage that the vibration can be effectively reduced in response to a change in the resonance frequency according to a change in the engine speed during a ship operation.

1 is an explanatory view for explaining a vibration measurement position of a ship in the present invention,
2 is an explanatory diagram for explaining a vibration control object in a ship in the present invention,
3 is a schematic configuration diagram of a vibration damping apparatus for a ship's dwelling cavity using a dynamic actuator according to the present invention,
FIG. 4 is a block diagram of a vibration damping apparatus for a ship dwelling using a dynamic actuator according to a preferred embodiment of the present invention.
Fig. 5 is a block diagram of an embodiment of the vibration measuring means of Fig. 4,
Fig. 6 is a configuration diagram of an embodiment of the control means of Fig. 4,
FIG. 7 is a block diagram of an embodiment of the vibration canceling means of FIG. 4,
8 is a conceptual diagram of a dynamic actuator mounting position for an arbitrary vibration control object in the present invention,
FIG. 9 is a schematic view of a first embodiment of a ship dwelling cavity vibration reducing apparatus using a dynamic actuator according to the present invention,
10 is a configuration diagram of a dynamic actuator applied to the present invention,
11 is a schematic view of a second embodiment of a ship dwelling cavity vibration reducing apparatus using a dynamic actuator according to the present invention,
12 is a flowchart showing a method for reducing vibration of a ship's dwelling using a dynamic actuator according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vibration damping apparatus for a ship dwell using a dynamic actuator according to a preferred embodiment of the present invention and a method thereof will be described in detail with reference to the accompanying drawings.

FIG. 4 is a block diagram of a vibration damping apparatus for a ship using the dynamic actuator according to the present invention, which includes a vibration measuring means 100, a control means 200 and a vibration canceling means 300.

The vibration measuring means 100 is provided on the upper part of the deckhouse and serves to measure vibrations in various directions (vertical (Z), longitudinal (X) and transverse (Y) directions).

5, the vibration measuring means 100 includes a first vibration measuring sensor 101 for measuring a vibration in a vertical direction generated by an external excitation force; A second vibration measurement sensor (102) for measuring a longitudinal vibration generated by the external vibration force; And a third vibration measurement sensor 103 for measuring vibration in the width direction generated by an external vibration force.

The control means 200 extracts vibration magnitude and phase in each direction measured by the vibration measurement means 100 and outputs a vibration cancellation signal having the same magnitude in the opposite direction to the extracted vibration magnitude and phase do.

As shown in FIG. 6, the control unit 200 includes a parameter extraction unit 210 that extracts vibration magnitude and phase from the measurement signals (Z, X, Y) measured by the vibration measurement unit 100; A vibration recognition unit 220 for recognizing the vibration magnitude and phase extracted by the parameter extraction unit 210; And a vibration cancellation signal generator 230 for generating a vibration cancellation signal having the same magnitude and phase as the extracted vibration magnitude under the control of the vibration recognition unit 220.

The vibration canceling signal generator 230 includes a first vibration canceling signal generator 231 for generating a vertical vibration canceling signal for vertical vibration; A second vibration canceling signal generator (232) for generating a length vibration canceling signal for longitudinal vibration; And a third vibration canceling signal generator 233 for generating a width vibration canceling signal for vibration in the width direction.

The vibration canceling means 300 serves to cancel vibration generated by vibrating the vibration control object in a direction opposite to the vibration direction in accordance with the vibration cancel signal output from the control means 200. [

The vibration canceling means 300 includes a width stiffener 4 for generating vibrations in the width direction; A vertical stiffener 5 installed above the width stiffener 4 to generate vibration in the vertical direction; A longitudinal stiffener 6 installed on the vertical stiffener 5 to generate vibration in the longitudinal direction and to receive the vibration control object 3; And a dynamic actuator 310 for vibrating the width stiffener 4, the vertical stiffener 5 and the longitudinal stiffener 6 in the direction opposite to the generated vibration.

The dynamic actuator 310 includes a pump 301 for varying a fluid amount corresponding to a magnitude of a vibration cancel signal generated by the control means 200; An accumulator 302 for maintaining the fluid supplied by the pump 301 for a predetermined time; And a cylinder 303 for moving the piston rod 304 back and forth with the fluid supplied from the accumulator 302.

The operation of the ship's dwelling cavity vibration reducing apparatus using the dynamic actuator according to the preferred embodiment of the present invention will be described in detail as follows.

First, in the ship, the vertical vibration, the horizontal vibration, the vibration due to the vibration, and the vibration caused by the propulsion shaft system and the propulsion system are combined. These ships have inherent vibration characteristics and are excited by the excitation force generated from the propulsion machinery. If the frequency of the exciting force and the natural frequency of ship are close to or coincident with each other, resonant transient vibrations will occur.

In order to eliminate such transient vibration, it is very important to accurately measure the vibration involved in the vibration control object. Here, the vibration control object means an object for canceling the generated vibration. In the present invention, the vibration of the cabin during various vibrations occurring in the ship is attenuated by the embodiment, and in particular, the bed where the crew sleeps is described as an embodiment. The present invention is not limited to a cabin bed, and vibration can be effectively reduced with respect to the entire area (or object) of a ship by applying a vibration measuring method and a vibration canceling method as in the embodiment according to the object of vibration control .

Vibration control of the cabin To reduce the vibration of the object to be controlled, the vibration of the deck house is measured. In the case of the ship's deckhouse area, vibration in the vertical direction (Z), the longitudinal direction (X) and the width direction (Y) occurs as shown in Fig. 1 by an external exciter force (Propeller, Main Engine, etc.). In order to measure the overall vibration of the deckhouse due to the predominant vibration direction depending on the operating speed (RPM), a vibration sensor is installed on the upper portion of the deckhouse (for example, Navi Deck) Measure the vibration in each direction.

For example, as shown in Fig. 5, the first vibration sensor 101 is provided so as to measure the vibration in the vertical direction (Z), and measures vibration in the vertical direction generated by an external vibration force. In addition, the second vibration measurement sensor 102 is installed to measure the vibration in the longitudinal direction X, and measures vibration in the longitudinal direction generated by the external vibration force. The third vibration measurement sensor 103 is provided to measure the vibration in the width direction Y, and measures the vibration in the width direction generated by the external vibration force.

The vibration sense values measured in the vertical direction, longitudinal direction and width direction measured by the first to third vibration measurement sensors (101 to 103) are transmitted to the control means (200).

The control unit 200 receives the vibration magnitude and phase (Mag / Phase) in each direction from the vibration measurement signals (Z, X, Y) of the three directions measured by the vibration measurement unit 100 through the parameter extraction unit 210 . Here, the vibration magnitude is calculated by sampling the vibration measurement signals of the detected directions in a predetermined interval and adding or averaging them. Sampling is performed for each predetermined interval, the sampling value is added, and the result is transmitted to the vibration recognition unit 220 as a phase determination value.

The vibration recognition unit 220 recognizes the magnitude and phase of vibration in each direction based on the vibration magnitude and phase determination value acquired for each direction. Here, it is preferable to determine the phase depending on whether the phase determination value is a positive value or a negative value, and this phase may be referred to as a direction of vibration.

Then, the vibration recognition unit 220 generates a vibration cancellation signal that is opposite to the direction of the vibration generated according to the vibration magnitude and phase recognized for each direction. For example, the vibration cancellation signal may have the same magnitude as the amplitude of the generated vibration, and may be a signal whose phase is opposite (reverse phase). Here, the vibration cancellation signal is three signals in the vertical direction, the longitudinal direction and the width direction (Z direction size and reverse phase signal, X direction size and reverse phase signal, Y direction size and reverse phase signal).

The vibration canceling signal generated for each direction is transmitted to the vibration canceling signal generating unit 230. The vibration canceling signal generating unit 230 generates a vibration canceling signal for each direction having the same magnitude and phase as the extracted vibration magnitude according to the vibration canceling signal generated in the vibration recognizing unit 220, 300).

For example, the vibration cancellation signal generating unit 230 generates a vertical vibration cancellation signal for causing the first vibration cancellation signal generator 231 to vibrate the vibration control object 3 in the vertical direction. In addition, the second vibration canceling signal generator 232 generates a length vibration canceling signal for vibrating the vibration control object 3 in the longitudinal direction. Further, the third vibration canceling signal generator 233 generates a width vibration canceling signal for vibrating the vibration control object 3 in the width direction.

The vibration cancellation means 300 cancels the vibration generated by vibrating the vibration control object 3 in the direction opposite to the vibration direction in accordance with the vibration cancel signal for each direction output from the control means 200. [

For example, as shown in Fig. 9, the vibration cancellation means 300 includes the dynamic actuator 310 shown in Fig. 10 on the width stiffener 4, the vertical stiffener 5 and the longitudinal stiffener 6, . The dynamic actuator 310 varies the amount of fluid for adjusting the hydraulic pressure in the pump 301 in accordance with the magnitude of the vibration cancel signal generated by the control means 200. The variable fluid amount is supplied to the cylinder 303 and operates the piston rod 304 connected to the cylinder 303. At this time, the pump 301 includes an anti-phase signal indicating a direction opposite to the direction of the vibration actually generated in the vibration cancel signal for varying the amount of generated fluid. Therefore, when the amount of displacement of the piston rod 304 is increased or decreased according to the initial position of the piston rod 304 (the piston rod is advanced in the initial state) The stiffener is advanced, and when the amount of displacement becomes negative (the piston rod is reversed in the initial state), the stiffener is moved backward. In this way, the three-directional stiffeners are vibrated in the opposite direction to the vibrations generated in the three directions (vertical direction, longitudinal direction, and width direction), thereby canceling the actually generated vibration. The accumulator 302 connected to the cylinder 303 serves to temporarily store the fluid supplied by the pump 301 or to remove the fluid when the pump 301 is in a pulsating state.

In other words, the present invention provides a fluid structure below the vibration control object. The control means 200 recognizes the magnitude and phase of the vibration actually generated in the vibration control object 30 in each direction and generates a vibration signal having a magnitude equal to the magnitude of the vibration generated in the opposite direction to the generated vibration, The dynamic actuator 310 is driven to vibrate each of the reinforcing members in a direction opposite to the generated vibration direction. Normally, a vibration frequency has a magnitude and a phase. When a reverse phase signal having the same magnitude and opposite phase is applied, frequency cancellation is performed. Therefore, based on this principle, the present invention vibrates the vibration control object 3 in the direction opposite to the direction of the generated vibration, thereby canceling the generated vibration.

FIG. 8 shows a mounting position of an actual dynamic actuator in the present invention. And shows the mounting position of the dynamic actuator in one dynamic region. Here, a black circle represents a piston rod, which means a dynamic actuator.

FIG. 11 shows a case where a vertical dynamic actuator for vertical vibration is removed and a rubber for vibration absorption is used in place of the vertical direction stiffener in the preferred embodiment as shown in FIG. In the case of FIG. 11, the vertical stiffener and the number of the dynamic actuators corresponding to the stiffener can be removed, thereby effectively eliminating the generated vibration and reducing the installation cost.

On the other hand, when the present invention is applied to an actual cabin bed, it is necessary to verify whether or not the vibration is effectively attenuated. To this end, as shown in FIG. 2, three vibration measurement sensors 400 capable of sensing vibrations in three directions are installed at specific positions of the vibration control object 3 in the present invention. In addition, the reference vibration value preset in order to determine the vibration in each direction detected by the three vibration measurement sensors 400 and the vibration state in the corresponding direction is compared for each direction to check whether the vibration is attenuated or not. For example, the vibration measurement value detected by the three vibration measurement sensors 400 is compared with a reference vibration value set for each direction, and it is determined that the vibration generated when the vibration measurement value is smaller than the reference vibration value is removed. Here, the reference vibration value can be changed by an experiment or the like by the user.

12 is a flowchart illustrating a vibration damping method for a ship's dwelling using the dynamic actuator according to the present invention.

As shown in this figure, (a) step (S10) of measuring the vibration in the direction of the cabin where the vibration control object is installed (V1); (b) extracting vibration magnitudes and phases in the measured directions and outputting the vibration magnitudes and phases in the vibration magnitude and phase in the opposite direction to the extracted vibration magnitudes and phases (S20 to S30); (c) canceling the vibration generated by vibrating the vibration control object (3) in a direction opposite to the vibration direction in accordance with the output vibration cancel signal (S40); (d) measuring (V2) vibration in each direction of the vibration control object 3 after the step (c) (S50); (e) comparing (S60) the preset reference vibration value to determine the vibration detection value of the vibration control object (3) and the vibration attenuation state of the vibration control object (3); (f) wherein (e) comparing the result of step if the vibration detection value (V2) is smaller than the reference vibration value (V _R), and determines that a vibration of the vibration control target (3) offset, the current vibration control state (Step S70). If it is determined in step S60 that the vibration detection value is greater than the reference vibration value, it is preferable to return to the first step.

The vibration damping method of a ship's dwelling using the dynamic actuator according to the present invention will be described in detail as follows.

First, in step S10, the vibration in the cabin angular direction (vertical direction, longitudinal direction, width direction) provided with the vibration control object 3 is measured. At this time, the vibration value measured in each direction is referred to as V1.

Next, in step S20, vibration magnitude and phase in each direction are extracted based on the measured vibration value. Based on the extracted vibration magnitude and phase, a vibration cancellation signal having the same magnitude in the opposite direction to the extracted vibration magnitude and phase is generated in step S30.

Next, in step S40, the vibration control object 3 is vibrated in the direction opposite to the vibration direction in accordance with the vibration canceling signal to be output, thereby canceling the vibration generated.

Thereafter, in step S50, the vibration in each direction of the vibration control object 3 is measured. The vibration detection value measured at this time is V2. And in step S60 compares the vibration detection value (V2) and a vibration control target (3) based on the vibration value (V _R) pre-set to determine the state of the vibration attenuation of the vibration measured by the control target (3).

Here, the vibration value comparison is performed by comparing the vertical vibration sense value of the vibration control object 3 with a preset vertical vibration reference value, and comparing the longitudinal vibration sense value of the vibration control object 3 with the preset longitudinal vibration reference value And compares the vibration detection value in the width direction of the vibration control object 3 with a preset reference vibration value in the width direction.

If later, the comparison result of the vibration detection value (V2) is smaller than the reference vibration value (V _R) has determined that the vibration of the vibration control target (3) offset and moves to step S70 and the current vibration control state . If the vibration detection value is greater than the reference vibration value as a result of the comparison in step S60, the operation returns to the first step and the vibration is canceled again. Here, in the case where vibrations in some directions among the vibrations in the three directions are canceled and vibrations in some directions are not canceled, the vibration control state in the direction in which the vibration is canceled is maintained and the vibration is canceled in the direction Control is preferably performed.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is applied to a technique of removing vibration from a ship. In particular, when a ship experiences transient vibrations in a local structure, such as a residential area, it is effectively applied to reduce vibration in the residential area.

3: Vibration control target
100: Vibration measuring means
101: first vibration measuring sensor
102: second vibration measurement sensor
103: Third vibration measurement sensor
200: control means
210: Parameter extraction unit
220: vibration recognition unit
230: Vibration canceling signal generator
300: vibration canceling means
301: Pump
302: Accumulator
303: Cylinder

Claims (12)

Vibration measuring means for measuring vibrations in multiple directions transmitted to a vibration control object;
Control means for extracting vibration magnitude and phase in each direction measured by the vibration measurement means and outputting a vibration cancellation signal having the same magnitude in the opposite direction to the extracted vibration magnitude and phase; And
And vibration canceling means for canceling vibration generated by vibrating the vibration control object in a direction opposite to the vibration direction in accordance with the vibration cancel signal outputted from the control means.
The apparatus of claim 1, wherein when the vibration control object is installed in a cabin space, the vibration measuring means is installed on an upper portion of the deckhouse.
The ship dwelling vibration reduction apparatus according to claim 1, wherein the vibration measuring means measures vibration in the vertical direction, the longitudinal direction and the width direction generated by the external excitation force.
4. The apparatus of claim 3, wherein the vibration measuring means comprises: a first vibration measuring sensor for measuring a vibration in a vertical direction generated by an external excitation force; A second vibration measurement sensor for measuring vibration in the longitudinal direction generated by the external vibration force; And a third vibration measurement sensor for measuring a vibration in a width direction generated by an external vibration force.
The apparatus according to claim 1, wherein the control means comprises: a parameter extracting unit for extracting a vibration magnitude and a phase from a measurement signal measured by the vibration measuring means; A vibration recognition unit for recognizing the vibration magnitude and phase extracted by the parameter extraction unit; And a vibration canceling signal generating unit for generating a vibration canceling signal having the same magnitude and opposite phase as the extracted vibration magnitude under the control of the vibration recognizing unit.
[6] The apparatus of claim 5, wherein the vibration cancellation signal generator comprises: a first vibration cancellation signal generator for generating a vertical vibration cancellation signal for vertical vibration; A second vibration canceling signal generator for generating a length vibration canceling signal for longitudinal vibration; And a third vibration canceling signal generator for generating a width vibration canceling signal for vibration in the width direction.
The ship dwelling vibration reduction apparatus according to claim 1, wherein the vibration canceling means is provided below the vibration control object, and vibrates the vibration control object to remove vibration.
The vibration damping device according to claim 7, wherein the vibration canceling means comprises: a width stiffener for generating vibrations in a width direction; A vertical stiffener installed on the width stiffener to generate vibration in a vertical direction; A longitudinal stiffener provided on the vertical stiffener to generate vibration in the longitudinal direction and to seat the vibration control object; And a dynamic actuator for vibrating the width stiffener, the vertical stiffener and the longitudinal stiffener in a direction opposite to the generated vibration.
The fluid dynamic actuator according to claim 8, wherein the dynamic actuator comprises: a pump for varying a fluid amount corresponding to a magnitude of a vibration cancel signal generated by the control means; An accumulator for temporarily storing the fluid supplied by the pump or removing the fluid when the pump is generated; And a cylinder for moving the piston rod forward and backward with the fluid supplied from the pump or the accumulator.
As a method for reducing vibration of a ship housing using a dynamic actuator,
(a) measuring vibration in each direction of a cabin in which a vibration control object is installed;
(b) extracting a vibration magnitude and a phase in the measured directions, and outputting the vibration magnitude and phase in the vibration magnitude and phase having the same magnitude in the opposite direction to the extracted magnitude and phase; And
and (c) canceling the vibration generated by vibrating the vibration control object in a direction opposite to the vibration direction in accordance with the output vibration cancel signal.
The method of claim 10, further comprising: (d) measuring vibration in each direction of the vibration control object after the step (c); (e) comparing the measured vibration value of the vibration control object with a predetermined reference vibration value to determine a vibration attenuation state of the vibration control object; (f) determining that the vibration of the vibration control object is canceled when the vibration detection value is smaller than the reference vibration value as a result of the comparison in the step (e), and maintaining the current vibration control state A method of vibration reduction of a ship dwelling using a dynamic actuator.
[12] The method of claim 11, wherein the step (e) includes the steps of: (e1) comparing the vertical vibration sensing value of the vibration control object with a predetermined vertical reference vibration value; (e2) comparing the longitudinal vibration sensing value of the vibration control object with a preset longitudinal vibration reference value; (e3) comparing a widthwise vibration detection value of the vibration control object with a preset reference vibration value in the width direction.

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