JP2005009616A - Damping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damping device capable of coping with the abnormality of dampers, controllers and the like. <P>SOLUTION: This damping device comprises a plurality of dampers 1-4 being expanded and contracted in the multiple direction in accordance with the movement of a floor slab (base-isolated structure) to the ground, and controllers (damping force control means) 11-14 for controlling the damping force of each of the dampers 1-4. This damping device comprises a main controller (integrated control means) 15 for monitoring the abnormality of the dampers 1-4 and the controllers 11-14, stopping the control of the damping force of the abnormal damper and the dampers expanded and contracted in the direction same as the abnormal damper, when the abnormality in one of the dampers is determined, and continuing the control of the damping force of the remaining dampers expanded and contracted in the directions different from that of the abnormal damper. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a vibration damping device that suppresses shaking of a building when an earthquake occurs.
[0002]
[Prior art]
For example, the vibration damping device disclosed in Patent Document 1 includes a plurality of dampers that extend and contract in multiple directions following the movement of a building with respect to the ground, and a controller that controls the damping force of each damper. Anomalies are monitored.
[0003]
Conventionally, as this type of damping device, as shown in FIG. 5, a plurality of dampers 1 to 4 that extend and contract in multiple directions following the movement of the building 30 with respect to the ground, and the damping force of each damper 1 to 4 Some of them have a plurality of controllers 11 to 14 for individually controlling them.
[0004]
In addition, as shown in FIG. 6, a plurality of dampers 1 to 4 that extend and contract in multiple directions following the movement of the building 30 with respect to the ground, and one unit that controls the damping force of each of the dampers 1 to 4 in an integrated manner. Some of them have a controller 10.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-18304
[Problems to be solved by the invention]
However, in the conventional vibration damping device shown in FIG. 5, when an abnormality occurs in one of the dampers 1 to 4 or the controllers 11 to 14, only one damping force control among the dampers 1 to 4 is controlled. The problem was that the building would be twisted because it was stopped.
[0007]
Further, the conventional vibration damping device shown in FIG. 6 has a problem that if the controller 15 is abnormal, it is impossible to control the damping force of all the dampers 1 to 4.
[0008]
The present invention has been made in view of the above-described problems, and an object thereof is to provide a vibration damping device that can cope with an abnormality such as a damper or a controller.
[0009]
[Means for Solving the Problems]
A first aspect of the present invention is a vibration damping device including a plurality of dampers that extend and contract in multiple directions following the movement of a seismically isolated structure with respect to the ground, and damping force control means that individually controls the damping force of each damper. Applies to
[0010]
Then, the abnormality of each damper or damping force control means is monitored, and if it is determined that one of them has an abnormality, the damping force control of the damper in which the abnormality has occurred and the damper that expands and contracts in the same direction is stopped. The integrated control means for continuing the damping force control of the remaining dampers that extend and contract in a direction different from that of the damper in which the abnormality has occurred is provided.
[0011]
Operation and effect of the invention
According to the first invention, when an abnormality occurs in one of the dampers or the damping force control means, the damping force control is stopped for those in which an abnormality has occurred and those that extend and contract in the same direction. It is avoided that the structure is twisted, and the required strength of the base-isolated structure can be reduced.
[0012]
Even if an abnormality occurs in one of the damper or damping force control means, the damping force control is continuously performed for the one in which the abnormality has occurred and the one that expands and contracts in the other direction. It can be suppressed in that direction.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0014]
In FIG. 1, reference numeral 30 denotes a floor slab (base-isolated structure) that constitutes a building frame such as a building. A base slab (ground) (not shown) and a seismic isolation mechanism (not shown) are provided between the two. A plurality of dampers 1 to 4 are provided.
[0015]
This seismic isolation mechanism is composed of, for example, laminated rubber or a rolling bearing, and supports the building so that it can be displaced in the horizontal direction with respect to the foundation, and functions to prevent the foundation from being transmitted to the building when an earthquake occurs.
[0016]
The dampers 1 to 4 operate to expand and contract as the building is displaced in the horizontal direction with respect to the foundation, and generate a damping force that suppresses the shaking of the building by the resistance applied to the hydraulic oil flowing inside the damper. In FIG. 1, two axes X and Y that are orthogonal to each other and extend in the horizontal direction are set, dampers 1 and 2 are arranged to extend in the X-axis direction, and dampers 3 and 4 are arranged to extend in the Y-axis direction. is doing.
[0017]
Each of the dampers 1 to 4 is a so-called semi-active damper having a damping force variable mechanism that can change the damping force by a driving current sent from the controllers 11 to 14 via the wiring 5. Four damper control units 21 to 24 are configured by the dampers 1 to 4, the controllers 11 to 14, the wiring 5, and the like.
[0018]
The controllers 11 to 14 input the stroke signals of the dampers 1 to 4 detected by a stroke sensor (not shown), and perform skyhook control for changing the damping force according to the speed at which the building is shaken. Each controller 11-14 constitutes damping force control means for individually controlling the damping force of each damper 1-4.
[0019]
Here, as shown in FIG. 2, skyhook control means that if a damper (skyhook damper) is attached between a virtual wall in an absolute coordinate system and a building, the building absolute acceleration response value can be reduced. This control method reproduces the damping force of the hook damper with a damper that is actually installed between the ground and the building. As shown in Fig. 3 (a), with passive (uncontrolled) dampers, if the building speed and ground speed are the same phase and the ground speed is faster than the building speed, the damper's damping force will transmit the ground movement to the building. Response acceleration increases (excitation mode). Skyhook control also generates the force of the Skyhook damper because the direction of the Skyhook damper force is opposite to the direction of the actual damper force, and the semi-active damper has no excitation force. I can't. Therefore, the skyhook control based on the Carnop theory is a control theory in which the damping force is set to 0 (unload mode) in the vibration mode and the ground motion is not transmitted to the building (FIG. 3B). Necessary and sufficient conditions for switching the damping force are expressed by the following equation.
1) v * (V−v)> 0: Unload mode 2) v * (V−v) <0: Damping force generation Each controller 11-14 individually controls the damping force of each damper 1-4. Therefore, when an abnormality occurs in one of the damper control units 21 to 24, the damping force control of only one of the dampers 1 to 4 is stopped, so that the building is twisted.
[0020]
In addition, in response to this, it is conceivable that the damping force of each of the dampers 1 to 4 is individually controlled by a single controller. However, when an abnormality occurs in this controller, the damping force control of all the dampers 1 to 4 is performed. Cannot be done.
[0021]
Therefore, in the present invention, the main controller 15 is provided as an integrated control means for controlling the operations of the controllers 11 to 14. The main controller 15 monitors the abnormality of each of the damper control units 21 to 24, and when it is determined that one of the dampers has an abnormality, the damping force of the damper in which the abnormality has occurred and the damper that expands and contracts in the same direction as the damper. The control is stopped, and the damping force control of the damper in which the abnormality has occurred and the remaining damper that expands and contracts in the other direction is not stopped.
[0022]
The flowchart of FIG. 4 shows a routine in which the main controller 15 controls the operations of the controllers 11 to 14, and is executed in the main controller 15 at regular intervals.
[0023]
First, the operation state of each damper control unit 21-24 is read in step S1. In subsequent steps S2 to S5, it is determined whether or not an abnormality has occurred in the damper control units 21 to 24.
[0024]
When it is determined in steps S2 and S3 that either one of the damper control units 21 and 22 is abnormal, the process proceeds to step S6 and is sent to the dampers 1 and 2 from the controllers 11 and 12 arranged in the X-axis direction. Cut off the drive current.
[0025]
If it is determined in step S4 or S5 that either one of the damper control units 23 or 24 is abnormal, the process proceeds to step S7 and the controller 13 or 14 disposed in the Y-axis direction is changed to the damper 3 or 4. Cut off the drive current sent.
[0026]
When it is determined in steps S2 to S5 that no abnormality has occurred in all the damper control units 21 to 24, the damping force control of all the damper control units 21 to 24 is performed.
[0027]
Since it is configured as described above, if an abnormality occurs in one of the damper control units 21 to 24, the damping force control of the abnormality occurring and the one that expands and contracts in the same direction is stopped. The twisting of the building is avoided and the required strength of the building can be reduced.
[0028]
And even if an abnormality occurs in one of the damper control units 21 to 24, the damping force control of the one in which the abnormality has occurred and the one that expands and contracts in the other direction is continuously performed. It can be suppressed.
[0029]
The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a vibration damping device showing an embodiment of the present invention.
FIG. 2 is a diagram for explaining Skyhook theory.
FIG. 3 is a diagram for explaining Skyhook theory.
FIG. 4 is a flowchart showing the control contents of the main controller.
FIG. 5 is a configuration diagram of a vibration damping device showing a conventional example.
FIG. 6 is a configuration diagram of a vibration damping device showing a conventional example.
[Explanation of symbols]
1-4 damper 11-14 controller 15 main controller 21-24 damper control unit

Claims (1)

In the vibration damping device comprising a plurality of dampers that extend and contract in multiple directions following the movement of the seismically isolated structure with respect to the ground, and damping force control means that individually controls the damping force of each damper, When the abnormality of the damping force control means is monitored and it is determined that one of them has an abnormality, the damping force control of the damper in which the abnormality has occurred and the damper that expands and contracts in the same direction is stopped, and an abnormality occurs. A vibration damping device comprising integrated control means for continuing damping force control of the remaining dampers that extend and contract in different directions from the dampers.

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