JPH0556414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a vibration control device that controls vibration by moving a movable mass using a rack and pinion mechanism.

[Prior art]

BACKGROUND ART In recent years, architectural structures such as buildings have become increasingly taller and larger in scale, but due to the sophistication of design methods, they are becoming more flexible and lighter. Therefore, disturbances such as strong winds and earthquakes cause vibrations as shown by the dotted lines in Figure 1. Such vibrations cause discomfort to building occupants, and can be especially severe during earthquakes. May cause large vibrations. In order to solve such problems, there is a vibration control device 1 shown in FIG. 2 that has been conventionally used. This vibration control device 1 includes a first
A movable mass 3 that is installed on a floor near the roof of the high-rise building 2 shown in the figure and is capable of reciprocating motion, a hydraulic actuator 4 that moves this movable mass 3, and a hydraulic servo 5 that operates this hydraulic actuator 4
and a vibration sensor 6 that detects the vibrations of the high-rise building 2.
and a spring 7 interposed between the movable mass 3 and the high-rise building 2.

Conventional vibration control device 1 having such a configuration
When the high-rise building 2, which is a vibrating object, tries to vibrate in the X direction shown in the figure, the vibration sensor 6 detects the vibration. In response to this detection signal, the hydraulic servo 5 operates the hydraulic actuator 4 with a control force proportional to the vibration speed, so the movable mass 3 linked thereto moves in the opposite direction to the vibration direction.
Vibration was controlled by the inertial force.

However, since the conventional vibration control device uses a hydraulic actuator, the device itself is quite large and requires a considerable amount of space when installed. In addition, maintenance work is required quite frequently, and there are also drawbacks such as high noise.

[Summary of the invention]

The present invention was made to eliminate the above-mentioned problems, and provides a vibration control device that is simple in structure and easy to maintain.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 3, 2, 3, and 6 are the same as those shown in FIG. 2, but the hydraulic actuator 4 and hydraulic servo 5 in FIG. 2 are replaced with a motor 9 and a controller 8 in FIG. and a pinion 10 attached to the drive shaft of the motor 9;
The movable mass 3 is driven by a rack 11 that engages with it. In addition, the spring 7 in FIG. 2 detects the relative displacement x ₂ −x ₁ between the movable mass 3 and the high-rise building 2 by the encoder 12 installed coaxially with the motor 9 in FIG. It has been replaced with a so-called electric spring whose force is generated by a motor 9. 13 is a slide bearing that guides the movable mass 3 with low friction; 14
is a rail.

The operation of the present invention having the above configuration will be described. When the high-rise building 2 tries to vibrate in the x direction in the figure, the vibration sensor 6 detects the signal and sends a vibration acceleration signal to the controller 8. The controller 8 receives this signal, integrates it, and supplies a current corresponding to the speed signal to the motor 9, so that the motor 9 generates a torque T corresponding to the vibration speed and rotates. Torque T generated
The pinion 10 is
If D is the diameter of the module circle of Attenuate. The equation of motion in this case is expressed by the following equation.

m ₁ x″ ₁ +k ₁ x ₁ +k ₂ (x ₁ −x ₂ )=F−U……(2) m ₂ x″ ₂ +k ₂ (x ₂ −x ₁ )=U……(3) U= cx' ₁ ...(4) where, m ₁ : Modal mass of the high-rise building k ₁ : Spring constant of 〃 m ₂ : Mass of the movable mass k ₂ : Spring constant between the movable mass and the high-rise building x ₁ , x′ ₁ , x″ ₁ : Displacement, velocity, and acceleration of high-rise building x ₂ , x′ ₂ , x″ ₂ : Displacement, speed, and acceleration of movable mass F: External force U: Control force C: Gain As mentioned above, Since the control force U acting between the movable mass 3 and the high-rise building 2 is obtained from the torque T in the rotational direction by the pinion rack mechanism, it is possible to use a motor that is easy to maintain and easy to design. It's getting old. Furthermore, by using the pinion rack mechanism, the drive section can be constructed very compactly, and the entire drive section can be housed inside the movable mass 3, as shown in FIG.

FIG. 4 shows another embodiment of the invention, 2, 3, 6, 8, 9, 10, 11, 12, 1
3 and 14 are the same as in FIG. 3, but in the example shown in FIG. 4, the motor 9 is attached to three movable masses, and the rack 11 is attached to the side of the high-rise building 2, which is the vibrating body. Also motor 9 and pinion 10
A gearbox 15 is provided between them.

Here, the operation of each part when vibration occurs in the high-rise building 2 is exactly the same as the example shown in FIG. 3, but the relationship between the torque T generated by the motor 9 and the control force U is If the ratio is 1:n and the diameter of the module circle of pinion 10 is D, then U=2nT/D...(5), and if we compare it with the example shown in Figure 3, we can obtain the same control force U. It can be seen that a torque of 1/n is sufficient for generation. In this way, even when the rack 11 is fixed to the side of the high-rise building 2, which is the vibrating body, a compact vibration control device can be constructed using the motor 9, which is easy to design. If a gearbox 15 is used in between, even a motor with a small torque capacity can be used by appropriately selecting the gear ratio. It goes without saying that this gearbook 15 can also be used in the example shown in FIG. 3 in which the rack 11 is on the movable mass 3 side.

FIG. 5 shows another embodiment of this invention,
The rack 11 in FIG. 2 is formed as a part of the movable mass 3, and in the case of a large rack,
It can be manufactured by directly cutting gears into a part of the movable mass 3, or
In the case of a small size, it can be manufactured by molding or the like. In this case, assembly and adjustment of the device are greatly simplified, and the rack mounting and adjustment parts are no longer necessary, making it possible to design the drive section even more compactly.

Further, although the above description has been given of an example in which the vibration control device of the present invention is applied to a high-rise building, it goes without saying that it can also be applied to other vibrating bodies, such as ordinary houses, towers, bridges, etc.

As detailed above, according to the present invention, a compact device can be designed using a motor that is easy to maintain and easy to design in a vibration control device for damping vibrations of high-rise buildings, etc., and furthermore, it is possible to design a compact device using a motor that is easy to maintain and easy to design. If the mechanism is used in combination, vibration control can be performed efficiently even with a motor with a small torque capacity.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a high-rise building, Fig. 2 is a sectional view showing a conventional example, Fig. 3 is a perspective view of a vibration control device according to the present invention, and Fig. 4 is a perspective view showing another embodiment of the present invention. , FIG. 5 is a diagram illustrating a movable mass utilizing the present invention. In the figure, 3 is a movable mass, 6 is a vibration sensor, 8 is a controller, 9 is a motor, 10 is a pinion, and 11 is a rack. It should be noted that the same or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A vibration sensor that detects the vibration of a vibrating body, a controller that receives a signal detected by the vibration sensor and flows a current corresponding to the signal, and a drive that receives a control current from the controller and rotates. It consists of a motor, a pinion gear that is rotatably fixed to the vibrating body and receives drive torque from the drive motor, and a movable mass that is fixed to a rack that meshes with the pinion gear and is movable in the direction of the rack axis. A brake control device characterized in that the mass is provided with a space for accommodating the rack, and the rack and pinion gear are engaged with each other in the space. 2. The vibration control device according to claim 1, characterized in that a rack is formed integrally with the movable mass. 3. A vibration sensor that detects the vibration of the vibrating body, a controller that receives a signal detected by the vibration sensor and sends a corresponding current, a drive motor that receives a control current from the controller and rotates, and a drive motor that rotates the vibrating body. It consists of a fixed rack, a pinion gear that meshes with the rack and transmits drive torque from the drive motor that is rotatably fixed to the movable mass, and a movable mass that moves in the direction of the rack axis. A space is provided to accommodate the drive motor,
A vibration control device characterized in that a rack and a pinion gear mesh in the space.