JP3662304B2 - Vibration control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration damping device that suppresses vibration of a structure such as a building, and more particularly to a vibration damping device having a function of detecting an abnormality of the device.
[0002]
[Prior art]
2. Description of the Related Art In order to suppress vibration generated in a structure such as a building due to an external force such as an earthquake or wind pressure, there is known a vibration damping device that obtains a vibration damping action using the motion of a movable mass body.
This vibration damping device includes an active mass damper and a passive mass damper.
[0003]
In the former active mass damper, the mass body is supported so that it can move horizontally in the building, and the mass body is moved by a power source such as a servo motor according to the vibration of the building to suppress the vibration of the building. It has become.
On the other hand, passive mass dampers have a simple structure, and a movable mass body is attached to a building via a spring. When the building vibrates, the energy stored in the spring suppresses the building vibration. Yes.
[0004]
[Problems to be solved by the invention]
By the way, in the case of the active mass damper described above, the mass body is actively moved by a power source to apply force to the building to control the vibration. Not only is the effect diminished, but it can also encourage building vibration.
For this reason, conventionally, each component of the vibration damping device is individually checked, and if a failure occurs in the components, measures such as immediately stopping the operation of the device have been taken.
[0005]
However, in the method of individually examining each part of the apparatus as described above, if a failure occurs in a part other than the check part, it is not possible to detect an abnormality of the apparatus.
By increasing the number of check points, it is possible to make it difficult to cause check omissions, but there are problems such as an increase in cost, and there is a limit.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration damping device capable of comprehensively detecting abnormality of a device by examining whether or not the vibration damping effect is correctly exhibited.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a vibration damping device that suppresses vibration of the structure by moving a mass body movably arranged in a horizontal plane in the structure with a predetermined power source. a first sensor for detecting a physical quantity related to the motion, and a second sensor for detecting a physical quantity relating to the movement of the mass body, acceleration obtaining for obtaining an acceleration of the mass body by a signal from the second sensor Means, speed acquisition means for acquiring the speed of the structure based on a signal from the first sensor, weight of the mass body, acceleration of the mass body acquired by the acceleration acquisition means, and speed acquisition by multiplying the velocity of the structure unit has acquired, a work rate calculating means for obtaining a work rate of the force acting from the mass to the structure, the work rate where the work rate calculation means calculated And accumulating a predetermined period of time, work and calculating means for determining the work of the force acting from the mass in the period to the structure, said work rate calculating means the work rate and the work calculation means calculated based on both the work obtained, and a abnormality determination means for determining whether 該制vibration unit is abnormal, the abnormality determination means, the value of the work rate where the work rate calculating means has determined that, When the work value obtained by the work calculation means is larger than a predetermined reference value related to work, and a predetermined signal indicating that the vibration damping device is abnormal is obtained. It is characterized by outputting .
[0008]
The present invention is also characterized in that the acceleration acquisition means, the speed acquisition means, the work rate calculation means, the work calculation means, and the abnormality determination means are configured by a computer.
[0009]
The present invention is also characterized in that the first sensor detects at least one of displacement, moving speed, and acceleration of the structure.
[0010]
The present invention is also characterized in that the second sensor detects at least one of a displacement, a moving speed, and an acceleration of the mass body.
[0011]
In the vibration damping device according to the present invention, the acceleration acquisition means, get the acceleration of the mass by a signal from the second sensor. The speed acquisition means acquires the speed of the structure based on a signal from the first sensor . Specifications things ratio calculation means, the weight of the mass, the acceleration of the mass by the acceleration acquiring means is obtained, and by multiplying the speed of the resulting structure is speed obtaining means, a force acting from the mass to the structure Ru search of work rate. Work calculating means, by cumulatively adding the value of the work rate Specification things ratio calculating means is determined for a predetermined period of time, determining the work forces acting to the structure from the mass during the period.
[0012]
Abnormality determining means, based on both the work is work rate calculating means work rate and work calculating means obtained was determined, it is determined whether the vibration damping device is abnormal. For this purpose, the abnormality determination means has a power value calculated by the power calculation means larger than a predetermined reference value related to the power, and the work value calculated by the work calculation means is a predetermined reference related to the work. When larger than the value, a predetermined signal indicating that the vibration damping device is abnormal is output.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, examples of the present invention will be described.
FIG. 2 is a schematic plan view showing an example of a vibration damping device according to the present invention, and FIG. 3 is a schematic side view.
[0014]
The vibration damping device 2 is for suppressing vibration in one horizontal direction of the building.
The base 4 is fixed on a floor 6 on the uppermost floor of the building, for example. The rectangular parallelepiped mass 8 is supported on the base 4 via a guide rail 10 and wheels 12 so as to be movable in the X direction.
Reaction force receivers 14 and 16 are disposed at both ends of the base 4, and these reaction force receivers 14 and 16 are connected to side surfaces of the mass body 8 facing the respective reaction force receivers by coil springs 18. .
[0015]
On the mass body 8, as means for moving the mass body 8, a servo motor 20, a reduction gear 22, a pinion 24 and a rack 26 constituting a pinion rack mechanism, and a beam 28 are provided.
The beam 28 extends in the X direction, is supported at the center of the upper surface of the mass body 8, and both ends thereof are fixed on the reaction force receivers 14 and 16.
The servo motor 20 is fixed to the upper surface of the mass body 8 so that its output shaft is orthogonal to the beam 28, and the output shaft of the servo motor 20 is connected to the speed reducer 22. A rack 26 is disposed on the beam 28, and the pinion 24 that engages with the rack 26 is connected to the output shaft of the speed reducer 22.
[0016]
When the motor 20 rotates, the pinion 24 rotates, and a force to move the beam 28 in the X direction acts on the rack 26 and thus the beam 28. However, since the beam 28 is fixed to the reaction force receivers 14 and 16, as a result, the mass body 8 moves in the X direction.
[0017]
A control device 30 including a microcomputer is arranged at a predetermined position of the building.
The control device 30 controls the servo motor 20 and detects an abnormality of the device according to the present invention. For the control, a signal from a sensor 32 that is attached to each part of the building and detects the moving speed of the building, and the mass. A signal from a sensor 34 which is attached to the body 8 and detects the acceleration of the mass body 8 is used.
[0018]
FIG. 1 is a functional block diagram showing the configuration of the control device 30.
The control device 30 includes a microcomputer 302, A / D converters 304 and 306, a display device 308, a D / A converter 312, and a motor control device 310.
When a voltage for controlling the servo motor 20 is supplied from the microcomputer 302 through the D / A converter 312, the motor control device 310 supplies power to the motor 20, and the rotation direction and rotation speed determined by the applied voltage. Then, the servo motor 20 is rotated.
The display device 308 is provided with an alarm lamp that is turned on when an abnormality occurs in the vibration control device. When a signal indicating the abnormality of the vibration control device is input from the microcomputer 302, the display device 308 turns on the lamp and controls the device. Inform the occurrence of abnormality.
[0019]
The microcomputer 302 includes a CPU, a ROM storing a program for operating the CPU, a RAM, and the like, and implements the functions shown in FIG.
The control means 302f performs a predetermined calculation process based on the moving speed of the building represented by the signal from the A / D converter 304, and calculates a control voltage applied to the control device 310 in order to suppress the vibration of the building.
In addition, when a signal indicating an abnormality of the apparatus is input from an abnormality determination unit 302e described later, a predetermined signal is output to cause the motor control apparatus 310 to stop driving the motor 20.
[0020]
The acceleration acquisition unit 302 a acquires the acceleration of the mass body 8 based on a signal from the A / D converter 306.
The speed acquisition unit 302b acquires the moving speed of the building based on the signal from the A / D converter 304.
The work rate calculation means 302c is the weight of the mass body 8 stored in advance in the ROM of the microcomputer 302, the acceleration of the mass body 8 acquired by the acceleration acquisition means 302a, and the building speed acquired by the speed acquisition means 302b. And the power of the force acting on the building from the mass body 8 is obtained. This work rate _D e _I is expressed by the following equation.
[0021]
[Expression 1]
_D e _I = −m · a · q
Here, m is the weight of the mass body 8, a is the acceleration relative to the absolute coordinates of the mass body 8, that is, the acceleration acquired by the acceleration acquisition means 302a, and q is the speed of the building, that is, the speed acquired by the speed acquisition means 302b. .
In [Equation 1], -m · a represents the force exerted by the mass body 8 on the building, so that the product of the velocity q of the building multiplied by the work velocity of the force acting on the building from the mass body 8 is Become. When the power value is negative, it indicates that the mass body 8 absorbs the vibration energy of the building, and hence a vibration damping effect is obtained. When the value is 0, the vibration damping effect is obtained. It is not obtained and the above value is positive, it means that external force (vibration) energy is applied on the contrary, and the shaking of the building is difficult to settle or the building is vibrated by the mass body 8 Become.
[0022]
The work calculation unit 302d cumulatively adds the work rates obtained by the work rate calculation unit 302c over a predetermined period, and obtains the work _D E _{I of the} force acting on the building from the mass body 8 in the period.
Abnormality determining means 302e, the value of the work rate _D e _I is greater than 0, when the value of the work _D E _I is greater than or equal to 0, no damping effect is obtained, an abnormality occurs in the device Then, a signal indicating that is output to the control means 302f and the display device 308.
Note that the cables connecting the control device 30 to the servo motor 20 and the sensors 32 and 34 are omitted in FIGS.
[0023]
With the vibration damping device 2 configured as described above, the vibration of the building is suppressed as follows.
For example, when an earthquake occurs and the building vibrates, the sensor 32 detects the vibration of the building and outputs a signal representing the detection result. The A / D converter 304 converts this signal into a digital signal and outputs it.
The control unit 302f receives a signal from the A / D converter 304, performs predetermined calculation processing based on the moving speed of the building represented by the signal, and supplies a control voltage to the control device 310 to suppress the vibration of the building. Calculate and output a digital signal representing the voltage.
The D / A converter 312 converts this signal into an analog signal and outputs the analog signal to the motor control device 310. The motor control device 310 supplies electric power to the servo motor 20 based on the voltage of the given analog signal, and rotates it. Control direction and speed. As a result, the vibration of the building due to an earthquake or the like is suppressed.
[0024]
The microcomputer 302 performs an operation for detecting an abnormality of the apparatus in addition to the operation for vibration suppression.
This will be described with reference to the flowchart of FIG.
First, the acceleration acquisition means 302a acquires the acceleration of the mass body 8 from the signal from the A / D converter 306 (step S1), and the speed acquisition means 302b receives the building from the signal from the A / D converter 304. Is acquired (step S2).
The power calculation means 302c includes the weight m of the mass body 8 stored in advance in the ROM of the microcomputer 302, the acceleration a of the mass body 8 acquired by the acceleration acquisition means 302a, and the speed acquisition means 302b. obtained by multiplying the velocity q of the building (Expression 1), determine the work rate _D e _I of the force acting from the mass 8 to the building (step S3).
[0025]
Thereafter, the work calculation unit 302d cumulatively adds the power values obtained by the work rate calculation unit 302c over a predetermined period, for example, a period corresponding to the primary natural period of the building, and from the mass body 8 in the period to the building. The work _D E _I of the force acting on is obtained (step S4).
Then, the abnormality determination unit 302e determines whether the value of the work rate _D e _I is greater than 0 (step S5), determines whether the value of the work _D E _I is 0 or more (step S6), and these When the determination results of both are true, the mass body 8 does not absorb the vibration energy of the building instantaneously (working rate) or cumulatively (working), and therefore no damping effect is obtained. Therefore, assuming that an abnormality has occurred in the vibration damping device, a signal indicating that is output to the control means 302f and the display device 308 (step S7).
As a result, the control means 302f outputs a predetermined signal to cause the control device 310 to stop driving the motor 20, while the display device 308 turns on the alarm lamp and an abnormality occurs in the vibration control device administrator. Let them know
Note that not only the work rate _D e _I of the mass body 8 but also the work _D E _I is used instantaneously even if the damping device is normal due to a slight error in the mechanical system. This is to avoid determining that an abnormality has occurred in such a case where the value of the work rate is slightly higher than 0.
If the determination results in steps S5 and S6 are negative, the microcomputer 302 returns to step S1 and repeats the series of operations for detecting an abnormality.
[0026]
As described above, in the vibration damping device of the present embodiment, the work rate and work of the force acting on the building from the mass body are calculated based on the acceleration of the mass body detected by the sensor and the speed of the building, and thereby the damping effect Is evaluated, and whether the mass body absorbs or imparts vibration energy of the building is determined, and the abnormality of the vibration damping device is comprehensively inspected.
[0027]
Therefore, in this device, it is possible to check whether there is an abnormality in the entire vibration damping device without increasing the number of inspection points.
[0028]
Further, the vibration damping device of the present embodiment has a vibration damping effect with respect to vibration in one direction, but a rail extending in the Y direction orthogonal to the X direction is provided on the base 4, If the rail 10 is arranged on the upper side via a predetermined wheel and a necessary drive system is provided so that the mass body 8 can be moved also in the Y direction, it can be controlled in any direction on the plane. A vibration effect can be obtained. In such a configuration, the present invention is of course effective, the effect as described above can be obtained.
[0029]
In the above embodiment, the sensor 32 detects the speed of the building. However, using the sensor 32 that detects at least one of the displacement and acceleration of the building, a necessary calculation is performed on the detection result, and the speed of the building is calculated. It is also possible to ask for it.
Although the sensor 34 detects the acceleration of the mass body 8, a sensor 34 that detects at least one of the displacement and speed of the mass body 8 is used as the sensor 34. It is also possible to determine the acceleration.
[0030]
【The invention's effect】
As described above, in the vibration damping device according to the present invention, the acceleration acquisition unit acquires the acceleration of the mass body from the signal from the second sensor, and the speed acquisition unit acquires the speed of the building from the signal from the first sensor. Get.
The work rate calculation means, the weight of the mass, the acceleration of the mass by the acceleration acquiring means is obtained, and by multiplying the rate of building the speed obtaining means to obtain the work of the force acting to the building from the mass Find the rate.
Further, the work calculation means cumulatively adds the work rates obtained by the work rate calculation means over a predetermined period to obtain a work of force acting on the building from the mass body in the period, and the abnormality determination means calculates the work ratio. Whether or not the vibration damping device is abnormal is determined based on both the work rate obtained by the means and the work obtained by the work calculation means.
[0031]
Accordingly, in the vibration damping device of the present invention calculates the power of work rate and work acting from mass to the building on the basis of the rate of acceleration and building mass detected by the sensor, evaluate the damping effect thereby et al In addition, it is possible to comprehensively inspect the abnormality of the vibration control device by determining whether the mass body absorbs or applies the vibration energy of the building.
Therefore, in this vibration damping device, it is possible to examine the presence or absence of abnormality of the entire vibration damping device without increasing the number of inspection points.
Then, by performing the individual check of each part of the device that has been conventionally performed, it is possible to realize a vibration control device with extremely high reliability.
[0032]
Follow me, in this damping device, since it is possible to ignore the instantaneous abnormal no problem, it can be inspected the abnormality of the vibration control device safely Joteki.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a control device constituting an example of a vibration damping device of the present invention.
FIG. 2 is a schematic plan view showing an example of a vibration damping device of the present invention.
FIG. 3 is a schematic side view showing the vibration damping device of FIG. 2;
4 is a flowchart for explaining the operation of the control device of FIG. 1;
[Explanation of symbols]
2 Vibration control device 4 Base 8 Mass body 12 Wheel 18 Coil spring 20 Servo motor 22 Reduction gear 24 Pinion 26 Rack 28 Beam 30 Control device 32, 34 Sensor 302 Microcomputer 302a Acceleration acquisition means 302b Speed acquisition means 302c Work rate calculation means 302d Work calculation means 302e Abnormality determination means 302f Control means 304, 306 A / D converter 308 Display device 310 Motor control device 312 D / A converter

Claims (4)

In a damping device that moves a mass body that is movably disposed on a horizontal plane in a structure by a predetermined power source, and suppresses vibration of the structure ,
A first sensor for detecting a physical quantity related to the movement of the structure;
A second sensor for detecting a physical quantity related to the movement of the mass body;
An acceleration acquisition means for acquiring an acceleration of the mass body by a signal from the second sensor,
Speed acquisition means for acquiring the speed of the structure by a signal from the first sensor;
The force acting on the structure from the mass body by multiplying the weight of the mass body, the acceleration of the mass body acquired by the acceleration acquisition means, and the speed of the structure acquired by the speed acquisition means. A work rate calculation means for obtaining the work rate of
Work calculation means for cumulatively adding the power values obtained by the power calculation means over a predetermined period to obtain work of force acting on the structure from the mass body in the period;
Based on both the work is the work rate calculating means the work rate and the work calculation means calculated determined, and a malfunction determination unit that determines whether 該制vibration apparatus is abnormal,
The abnormality determination unit is configured such that the power value obtained by the work rate calculation unit is greater than a predetermined reference value related to the work rate, and the work value obtained by the work calculation unit is a predetermined value related to work. When larger than the reference value, a predetermined signal indicating that the vibration damping device is abnormal is output.
A vibration damping device characterized by that. The acceleration acquisition means, said speed obtaining means, the work rate calculating means, the work calculating means, and the abnormality determination unit vibration damping device according to claim 1, characterized in that is constituted by a computer. Said first sensor is a displacement of the structure, the moving speed, the vibration damping device according to claim 1, wherein detecting at least one of the acceleration. The second sensor is a displacement of the mass body, moving speed, the vibration damping device according to claim 1, wherein detecting at least one of the acceleration.

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