JPH11159193A - Active type damping floor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an active type damping floor device capable of coping with both of slight vibration (small vibration) and earthquake motion (large vibration), and ensuring accuracy sufficient enough to control the slight vibration. SOLUTION: In an active type damping floor device having a damping actuator between a building structural body 1 and a damping floor 2, as the damping actuator, an earthquake actuator 4A with large control amplitude and a slight vibration actuator 4B with small control amplitude are prepared, and they are connected in two-stage series and are provided between the building structural body 1 and dampling floor 2. In the case of an earthquake mode, the earthquake actuator 4A is driven in a state to lock the slight vibration actuator 4B, and in the case of a slight vibration mode, a controller 8 for driving the slight vibration actuator 4B in a state to lock the earthquake actuator 4A is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a micro vibration (small vibration)
The present invention relates to an active damping floor device capable of coping with both earthquake and ground motion (large vibration).

[0002]

2. Description of the Related Art In an active damping floor device used in a precision machine factory or a clean room, a damping actuator is interposed between a building structure and a damping floor supported by the structure. , By the damping actuator, on the damping floor,
The vibration of the damping floor is suppressed by giving a displacement having a phase opposite to that of the disturbance vibration. Conventionally, in this type of vibration damping device, the main disturbance to be controlled is a minute vibration, and the system is stopped when a large vibration such as an earthquake occurs.

[0003]

As described above, in the conventional vibration damping floor apparatus, when a large vibration such as an earthquake occurs, the system is stopped. Etc. and may cause damage. Therefore, it is conceivable to use a large-amplitude actuator capable of functioning even during an earthquake as the damping actuator. However, if this is the case, the amplitude of the target vibration becomes too wide, which is sufficient for controlling micro-vibration. Accuracy may not be obtained.

In consideration of the above circumstances, the present invention can cope with both micro vibrations (small vibrations) and seismic motions (large vibrations), and can secure sufficient precision for control during micro vibrations. It is an object of the present invention to provide an active vibration control floor device.

[0005]

According to the first aspect of the present invention, a displacement in a phase opposite to a displacement caused by disturbance vibration is applied to a damping floor between a building structure and a damping floor supported by the structure. In an active vibration damping floor device having a vibration damping actuator that suppresses vibration of the vibration damping floor by applying the vibration damping actuator, the vibration damping actuator includes a large vibration actuator having a large control amplitude and a small vibration having a small control amplitude. An actuator was prepared, and the large-vibration actuator and the small-vibration actuator were connected in series in two stages to interpose between the structure and the vibration-damping floor, and the small-vibration actuator was locked in the large-vibration mode. A control device that drives the large vibration actuator in the low vibration mode and drives the small vibration actuator with the large vibration actuator locked in the small vibration mode Characterized in that was.

A second aspect of the present invention is characterized in that, in the first aspect, the small vibration actuator is on the vibration damping floor side and the large vibration actuator is on the structure side, and both actuators are connected in series.

According to a third aspect of the present invention, in the first or second aspect, the vibration damping floor is supported by the structure via a seismic isolation device for extending a response cycle to horizontal vibration.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the control device changes the control mode to a large vibration mode or a small vibration mode based on a signal from a vibration sensor provided on the vibration damping floor and the structure. Switching to the mode.

A fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the damping actuator is arranged so as to apply a horizontal displacement to the damping floor.

A sixth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the vibration damping actuator is arranged to apply a vertical displacement to the vibration damping floor.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of the active vibration damping floor device of the embodiment. In the figure, 1 is a building structure, and 2 is a vibration-damping floor. The vibration damping floor 2 is supported on the floor surface of the structure 1 via a seismic isolation device 3 that extends the response cycle to horizontal vibration. As the seismic isolation device 3, a multi-layer laminated rubber or a pendulum type as shown in the figure can be used, which enables support without the influence of higher-order vibration modes.

At appropriate locations between the seismic isolation device 3 and the damping floor 2 and between the wall of the structure 1 and the damping floor 2, a displacement having a phase opposite to that caused by disturbance vibration is applied to the damping floor 2. , A vibration damping actuator unit 4 for suppressing vibration of the vibration damping floor 2 is interposed. The vibration damping actuator unit 4 between the seismic isolation device 3 and the vibration damping floor 2 is arranged to give a vertical displacement to the vibration damping floor 2, and the vibration damping actuator unit 4 is arranged between the wall of the structure 1 and the vibration damping floor 2. The damping actuators 4 are arranged so as to apply a horizontal displacement (two orthogonal directions) to the damping floor 2.

Each of the vibration damping actuator units 4 includes an actuator 4A for large earthquake (large vibration) having a large control amplitude,
Actuator 4 for small vibration (small vibration) with small control amplitude
And B are connected in series in two stages. A microvibration actuator 4B is arranged on the vibration damping floor 2 side, and an earthquake actuator 4A is arranged on the structure 1 side. As the microvibration actuator 4B, an actuator having a small amplitude such as a piezo actuator, an electrostrictive actuator, or a giant magnetostrictive actuator is used. As the actuator 4A for earthquake, actuators having a long movable range such as various electromagnetic actuators and linear motors are used.

Further, on the vibration-damping floor 2 and the floor of the structure 1, a required number of sensors 6 for detecting vibrations in two horizontal directions and sensors 7 for detecting vibrations in the vertical direction are provided. The signals from these sensors 6 and 7 are transmitted to the actuators 4A and 4A, respectively.
The control device 8 supplies a control signal to the drive circuit unit 9 of B, and the control device 8 determines the level and direction of the vibration based on the signals from the sensors 6 and 7, and based on the determination result, To control the actuators 4A and 4B.

More specifically, the control device 8 selects the earthquake mode when the vibration is large such as an earthquake, and selects the micro vibration mode when the vibration is small. In the earthquake mode, the vibration of the vibration damping floor 2 is suppressed by driving the actuator 4A for earthquake while the actuator 4B for microvibration is locked. Further, in the micro vibration mode, the vibration of the vibration damping floor 2 is suppressed by driving the micro vibration actuator 4B with the seismic actuator 4A locked.

Actually, the control device 8 always sets the control mode to the fine vibration mode, and drives the fine vibration actuator 4B in response to the fine vibration to suppress the vibration of the vibration damping floor 2. I have. Then, when an earthquake, the sensors 6 and 7 installed on the floor detect the shaking of a building of a certain size or more, the control device 8 switches the control mode to the earthquake mode, locks the microvibration actuator 4B, and The actuator 4A is operated to suppress the vibration caused by the earthquake. Eventually, when the control device 8 determines the end of the earthquake, the control mode is switched again to the micro-vibration mode and the control returns to the normal control.

In the above embodiment, the case where two horizontal directions are to be controlled has been described. However, the apparatus may be configured so that only one horizontal direction is to be controlled. Since there is not much vertical swing during an earthquake, only the microvibration actuator 4B can be provided. There are various ways of connecting the two types of actuators, and the actuators may be directly connected to each other. However, an intermediate body (for example, a box) surrounding the damping floor is provided, and the two types of actuators are connected via the intermediate body. And two types of actuators may be connected.

[0018]

As described above, according to the first aspect of the present invention, the object to be controlled is classified into small vibration and large vibration, and the small vibration actuator and the small vibration actuator are connected in series according to the magnitude of the vibration. Since the actuator for large vibration is switched and driven, an optimum vibration damping effect can be exhibited for each disturbance. In particular, by selecting the small vibration mode at all times, accurate vibration control can be performed, which can contribute to an improvement in the yield of production machines on the vibration control floor. Further, by switching to the large vibration mode during an earthquake, the machine and the worker can be protected from the earthquake. In addition, since the actuator for small vibration is locked at the time of large vibration, there is no fear that the actuator for small vibration is damaged by the operation of the large vibration actuator. Further, since the main part has a structure in which only two actuators are connected, the structure is simple and can be realized at low cost.

According to the second aspect of the present invention, the two actuators are connected in series with the small vibration actuator on the vibration damping floor side and the large vibration actuator on the structure body side. , The vibration damping accuracy can be improved as compared with the case where the arrangement is reversed.

According to the third aspect of the present invention, the damping floor is supported via the seismic isolation device for extending the response cycle to horizontal vibration, so that the driving force of the actuator for suppressing horizontal vibration is effectively controlled. Can be conveyed to the shaking bed. In addition, since the load can be reduced, the size of the actuator can be reduced.

According to the fourth aspect of the present invention, the control device switches the control mode according to the signal of the vibration sensor provided on the vibration damping floor and the structure, so that the seismic force propagating from the structure and the generation on the vibration damping floor are generated. Thus, it is possible to detect the vibration of the machine to be distinguished and to switch the control mode appropriately.

According to the fifth aspect of the present invention, since the vibration damping actuator is arranged so as to apply a horizontal displacement to the vibration damping floor, a vibration damping effect against horizontal vibration can be exerted.

According to the sixth aspect of the present invention, since the vibration damping actuator is arranged so as to apply a vertical displacement to the vibration damping floor, a vibration damping effect against vertical vibration can be exerted.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of a vibration damping floor device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Structure 2 Damping floor 3 Seismic isolation device 4 Vibration suppression actuator unit 4A Actuator for earthquake (for large vibration) 4B Actuator for micro vibration (for small vibration) 6, 7 Sensor 8 Control device 9 Drive circuit section

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Suzuki 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Tomio Saito 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Corporation Inside the corporation

Claims (6)

[Claims] 1. A vibration of a damping floor is suppressed by applying a displacement of a phase opposite to a displacement due to disturbance vibration to a damping floor between a structure of a building and a damping floor supported by the structure. In an active vibration damping floor device having a vibration damping actuator interposed therebetween, as the vibration damping actuator, a large vibration actuator having a large control amplitude and a small vibration actuator having a small control amplitude are prepared. By connecting the small vibration actuator in two stages in series, it is interposed between the structure and the vibration damping floor, and in the large vibration mode, the large vibration actuator is driven with the small vibration actuator locked. Active vibration suppression characterized in that a control device for driving the small vibration actuator while the large vibration actuator is locked in the vibration mode is provided. Apparatus. 2. The actuator according to claim 1, wherein the actuator for small vibration is on the vibration damping floor side and the actuator for large vibration is on the structure side, and both actuators are connected in series.
An active vibration damping floor device as described in the above. 3. The active vibration-damping floor according to claim 1, wherein the vibration-damping floor is supported by the structure via a seismic isolation device for extending a response cycle to horizontal vibration. apparatus. 4. The control device according to claim 1, wherein the control device switches the control mode to a large vibration mode or a small vibration mode according to a signal from a vibration sensor provided on the vibration damping floor and the structure. An active vibration damping floor device as described in Crab. 5. The active vibration damping device according to claim 1, wherein said vibration damping actuator is arranged to apply a horizontal displacement to a vibration damping floor. Floor equipment. 6. The active vibration damping device according to claim 1, wherein the vibration damping actuator is arranged to apply a vertical displacement to the vibration damping floor. Floor equipment.