JPS60123675A - Vibration controller of structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a vibration control device for reducing vibrations of structures such as buildings, antennas, nuclear power control panels, etc. This invention relates to a servo attenuator using external energy.

[Prior art]

Previously, this German device was shown in Figure 1. In the figure, (1) is a structure that generates vibrations when subjected to external forces such as wind or earthquakes, and (2) is a building, an antenna, a nuclear power control panel, etc., for example. (2) is the ground on which the structure (1) is installed, and (3) is a vibration detector that detects vibrations of the water and the upper surface of the structure (1), which is an accelerometer in this example. (4) fully controls the actuator (6) based on the detection signal from the vibration detector (3), and controls the drive section (7) of the actuator (6).
) is a control circuit for driving the additional booklet (8). (9) is a mounting base that fixes the stationary part of the actuator (6) to the structure (1), and 0@ is a spring inserted between the additional weight (8) and the structure (1).

FIG. 2 is a block diagram showing a control system of the conventional vibration control device shown in FIG. 1.

(4a) is an integration circuit, and (4b) is a performance circuit.

FIG. 3 (d) is a cross-section 1Mj diagram showing an enlarged view of an example of the actuator shown in FIG.
c) is an excitation yoke, and (6d) is a drive coil.

(6e) is a support that supports the drive coil (6d), and an additional weight (8) is fixed to the other end of the support (6e), so that it can be driven in a straight line and back and forth. The stationary part of the actuator (6) is fixed to the structure fl+ via a mounting base (9).

Next, the operation will be explained based on FIGS. 1 to 3.

When the structure (1) vibrates in the horizontal direction due to an external force such as an earthquake or wind load, the vibration acceleration of the structure (1) is detected as an electrical signal by the vibration detector (3).

This electrical signal is transmitted to the control circuit (4), and the integration circuit (
In step 4a), the signal is integrated into a vibration velocity signal, which is amplified to a magnitude of H in an arithmetic circuit (4b) to control the drive of the actuator (6). Control from control circuit (4) (
The i number, that is, the drive current, is supplied to the drive coil (6d) of the actuator (6), and as a result, an electromagnetic force is generated in the drive coil (6d) due to electromagnetic effect.

The Junka M weight (8) attached to the other end is driven horizontally.

At this time, based on the principle of 9 actions and 9 reactions, this driving force acts on the structure f1+ via the mount (9) that supports the actuator (6), and this driving force is caused by the vibration of the structure (1). Since the force is proportional to the speed, it acts on the structure (1) isometrically as a damping force.

Therefore, such a device improves the damping characteristics of the structure (1), in other words, the dynamic rigidity, and functions as a vibrating fltl scoop 11 device. Also,
The spring (10) is installed to determine the neutral position of the additional weight (8).

Since the conventional vibration RjlJ side 1 device is configured as described above, it is effective in improving the damping characteristics of the structure (11), but it has drawbacks such as the lack of a static rigidity control function.

[Summary of the Invention J This invention was made in order to eliminate the drawbacks of the conventional products as described above. , a first vibration detector that detects vibrations of the structure, and a second vibration detector that detects vibrations of the additional weight.

A vibration velocity signal and a vibration displacement signal of the structure are obtained from the detection signal of the first vibration detector, and a vibration velocity signal of the additional weight is obtained from the detection signal of the second vibration detector, and these signals are Based on J:, the above-mentioned additional type 1]! By providing a control circuit that drives the structure, it is possible to improve the dynamic rigidity by improving the damping characteristics of the structure.

Vibration control that can also improve static rigidity 4. The purpose is to provide +1 equipment.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained based on the drawings.

FIG. 4 shows a vibration control device according to an embodiment of the present invention. In the figure, (3) is a first vibration detector that detects horizontal imaging of the structure (1), which is an accelerometer in this example. Qll is a second vibration detector that detects horizontal vibration of the additional weight (8), and is an accelerometer in this example.

In the control circuit (4), these first and second vibration detectors +
31. The actuator (6) is controlled based on the detection signal from Qll, and the additional MII! (8) is driven, and the principle thereof will be explained below.

That is, the imaging reduction principle of the device according to the present invention is based on the following equation of motion that holds true when a forcing force (external force) and a control force act on a structure (++).

However, + MS: Structure (mass of ++ Ks: Structure (
11 Rigidity Configure.

However, C1: Structure velocity feedback gain (Improvement of dynamic stiffness) c2: Structure displacement feedback gain (Improvement of surface stiffness 9) C3: Gravity force IJ weight velocity feedback gain (stabilization) (1) and (2) When it comes to Shikigadai.

As can be seen from equation (3,), each frame 1-
Each characteristic can be improved by dopuck gain.

FIG. 5 is a block diagram showing a control system for the vibration-side 4i11 device shown in FIG. 4 according to an embodiment of the present invention. In the figure, (4a) is an integral circuit that converts the structure detected by the first vibration detector +31 (+1 imaging acceleration signal into a vibration velocity signal, (4b) is the output of the integral circuit (4a),
That is, an integrating circuit that converts the vibration velocity signal of the structure (1) into a vibration displacement signal, (4c) is the second vibration detector Q11
This is an integrating circuit that converts the vibration acceleration signal of the additional weight (8) detected by the vibration acceleration signal into a vibration velocity signal. (4d) is an arithmetic circuit which receives the signals from each of the integrating circuits (4a) to (4C) and adjusts the phase and cane of each signal according to equation (4), and performs addition and subtraction so as to produce the required output. Do this. Power is amplified based on the output signal of the arithmetic circuit (4d) to control the drive of the actuator (6) and drive the additional weight.

In this way, in response to the detection signals from the first vibration detector (3) that detects the imaging of the structure (1) and the second vibration detector 01 that detects the vibration of the additional weight (8), This constitutes a foot control servo mechanism that drives the actuator (6).

The number of layers of each of the circuits (4a) to (4d) in the control circuit (4) according to the embodiment 1+11 of the present invention as described above is as follows.

First, from the first vibration detector (3) to the 4th branch circuit (4a
) to the actuator (6) has the function of applying a driving force, that is, a damping force, to the structure (11) according to the vibration speed of the structure (1), and controls the damping characteristics of the structure fl+, that is, the dynamic Improve the rigidity of the integral circuit (
4b) to the actuator (6).

The driving force corresponding to the vibration displacement of structure (1) is applied to structure (1).
It has the function of imparting to The control system leading to the actuator (6) uses an additional weight (8)
This generates a driving force 11 corresponding to the shooting speed of the additional weight (8), which applies a damping force to the additional weight (8).
) to suppress the oscillation and stabilize it.

With such a configuration, both the static rigidity and dynamic rigidity characteristics of the structure t1+ can be extremely improved,
Even if the structure (1) changes over time, it can be tracked and there is little change in control performance. Furthermore, the operational stability range of the device is also expanded.

In the above embodiment, the case where this device is installed on the top floor of the structure ( ) has been shown, but it goes without saying that the same effects as in the above embodiment can be achieved even if the device is installed on any floor.

In the above example, the first. second vibration detector +3),
Although the case where an accelerometer is used as Ql) has been described, a speedometer may also be used, and in this case, the integrating circuits (4a) and (4b) shown in FIG. 5 are unnecessary.

As for the actuator (6), in addition to an electromagnetic actuator, a tilting pneumatic or hydraulic actuator may be used. [Effects of the Invention] As described above, according to the present invention, a structure that generates vibration in response to an external force is created. An actuator installed on an object.

Additional weight driven by this actuator.

A first vibration detector that detects vibrations of the structure.

a second vibration detector that detects vibrations of the additional weight;

A vibration velocity signal and a vibration displacement signal of the structure are obtained from the detection signal of the first vibration detector, and a vibration velocity signal of the additional weight is obtained from the detection signal of the second vibration detector, and these signals are Since a control circuit is provided to control the actuator and drive the additional weight, it is possible to improve the dynamic stiffness of the structure by improving the damping characteristics of the structure, and also to improve the static stiffness of the structure. This has the effect of expanding the stable operation region.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a conventional vibration control device, Fig. 2 is a block diagram showing a control system of the conventional vibration control device shown in Fig. 1, and Fig. 3 is an enlarged view of an example of the actuator shown in Fig. 1. 4 is a configuration diagram showing a vibration control device according to an embodiment of the present invention, and FIG. 5 is a configuration diagram showing a control system of the vibration control device according to an embodiment of the present invention shown in FIG. 4. It is a diagram. In the figure, (1) is a structure, (3) is a first vibration detector, (4) is a control circuit, and (4a) to (4C) are integral circuits. (4d) is the arithmetic circuit, (6) is the actuator, (8)
is the additional weight and Qll is the second vibration detector. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1

Claims (2)

[Claims] (1) An actuator installed in a structure that generates vibrations in response to an external force, an additional weight driven by this actuator, a first vibration detector that detects vibrations of the structure, and a vibration detector that detects vibrations of the additional weight. The vibration velocity signal and vibration displacement signal of the structure are determined from the vibration detector g2 to be detected, the detection signal of the first vibration detector, and the vibration of the weighted node 1 from the detection signal of the second vibration detector. A vibration control device for a structure, comprising a control circuit that obtains speed signals, controls the actuator based on these signals, and drives the additional weight. (2) First. 2. The structure imaging control device according to claim 1, wherein the second vibration detector is an accelerometer.