JPS5983849A - Vibration control device - Google Patents

Abstract

PURPOSE:To reduce the frictional resistivity acting on an addition weight as well as to aim at the miniaturization of a driving actuator and an increase in the service life of a bearing assembly, by applying a noncontact magnetic supporting device, which uses electromagnetic force, to the bearing assembly supporting the addition weight. CONSTITUTION:A supporting shaft 22 of an addition weight 21 is magnetically attracted and supported by an electromagnet 5 composed of an iron core 51 and an exciting coil 52. An exciting current of the exciting coil 52 is controlled by a positional signal out of a position detector 6 detecting a level position of the supporting shaft 22, while the supporting shaft 22 is supported together with a supporting block 23 each other in a noncontact manner. As a result, frictional resistivity against motion in a horizontal direction of the addition weight 21 is nil, therefore vibrations are very smooth indeed, thus not only the driving force required for an actuator 25 is reduced in its capacity but also service life for a supporting mechanism of the addition weight 21 is prolonged.

Description

【発明の詳細な説明】 本発明は構造物の免震あるいは制振に用いる付加重錘の
振動慣性力を利用し、かつザーポ機構を用いた振動制御
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration control device that utilizes the vibration inertia of an additional weight used for seismic isolation or damping of a structure, and that uses a sarpo mechanism.

第１図はこの種装置の基本的構成を示し、１は振動制御
の対象となる構造物、２は構造物１に取付けられた付加
重錘駆動装置、３は構造物１に装着された振動検出器、
４は撮動検出器３の検出信号に応じて制御信号を駆動装
置２に加える制御回路である。　　　　　　　１、−１ 又、第２図は従来の横型の付加重錘駆動装置２の構成を
示し、２１は付加重錘、２２は付加重錘２１の支持軸、
２３は直動ころがり軸受２４を介して支持軸２２を振動
自在に支持する支持台、２５は取付台２８に取付けられ
たアクチュエータ、２６はアクチュエータ２５の駆動部
、２７は支持軸２２と駆動部２６を連結するカップリン
グ、２９は支持台２３および取付台２８を固定する架台
で、架台２９は第１図のように構造物１の天井部に取付
けるかあるいは構造物１の床部に取付ける。Figure 1 shows the basic configuration of this type of device, where 1 is a structure to be controlled by vibration, 2 is an additional weight drive device attached to structure 1, and 3 is a vibration control device attached to structure 1. Detector,
Reference numeral 4 denotes a control circuit that applies a control signal to the drive device 2 in response to a detection signal from the imaging detector 3. 1,-1 FIG. 2 shows the configuration of a conventional horizontal additional weight drive device 2, where 21 is an additional weight, 22 is a support shaft for the additional weight 21,
Reference numeral 23 indicates a support base that supports the support shaft 22 in a vibrating manner via a linear motion rolling bearing 24, 25 an actuator attached to the mounting base 28, 26 a drive section of the actuator 25, and 27 a support shaft 22 and drive section 26. A coupling 29 is a pedestal for fixing the support 23 and the mounting 28. The pedestal 29 is attached to the ceiling of the structure 1 as shown in FIG. 1 or to the floor of the structure 1.

次に上記構成の振動制御装置の動作を説明する。Next, the operation of the vibration control device having the above configuration will be explained.

まず、構造物１が地震あるいは風荷重等の外力を受けて
水平方向に振動すると、振動検出器３はこの振動を検出
して電気信号を発生する。制御回路４はこの電気信号を
受けて振動変位量あるいは振動速度量等に変換する。制
御回路４の出力はアクチュエータ２５に加わり、これに
応じてアクチュエータ２５は駆動力を発生し、この駆動
力は駆動軸２６、カップリング２７および支持軸２２を
介して伺加重錘２１に加わり、付加重錘２１を振動的に
運動させる。この際、作用、反作用の原理に基いて、前
記駆動力がアクチュエータ２５を装着した取付台２８お
よび架台２９を介して構造物１に加わる。従って、この
駆動力が構造物１の振動に対抗するように制御回路４を
設定すると、構造物１の振動は極度に減衰し、振動制御
装置としての機能が発揮される。First, when the structure 1 vibrates in the horizontal direction due to an external force such as an earthquake or wind load, the vibration detector 3 detects this vibration and generates an electric signal. The control circuit 4 receives this electrical signal and converts it into a vibration displacement amount, vibration velocity amount, or the like. The output of the control circuit 4 is applied to the actuator 25, and in response, the actuator 25 generates a driving force. This driving force is applied to the supporting weight 21 via the drive shaft 26, coupling 27 and support shaft 22, and The weighted weight 21 is moved in a vibratory manner. At this time, based on the principle of action and reaction, the driving force is applied to the structure 1 via the mount 28 and the pedestal 29 on which the actuator 25 is mounted. Therefore, if the control circuit 4 is set so that this driving force opposes the vibration of the structure 1, the vibration of the structure 1 will be extremely damped, and the function of the vibration control device will be exhibited.

しかるに、従来の振動制御装置においては、付加重錘２
１の支持軸２２が直動ころがυ軸受２４によって支承さ
れているので、付加重錘２１が大きくなるとその運動に
反抗する摩擦抵抗力が極めて大きくなり、これに伴うア
クチュエータ２５の容量の増大、さらには摩擦、摩耗に
伴う直動ころがυ軸受の寿命の低下などの欠点を有し、
振動制御装置としての信頼性に著しく乏しいものであっ
た。However, in the conventional vibration control device, the additional weight 2
Since the linear motion rollers of the support shaft 22 of the first support shaft 22 are supported by the υ bearings 24, as the additional weight 21 increases, the frictional resistance that opposes its motion becomes extremely large, and the capacity of the actuator 25 increases accordingly. Furthermore, direct-acting rollers due to friction and wear have shortcomings such as shortening the life of υ bearings.
The reliability as a vibration control device was extremely poor.

本発明は上記のような従来の欠点全除去するために成さ
れたものであり、付加重錘を支承する軸受に電磁力を利
用した非接触形の磁気支持装置を適用することによシ付
加重錘に作用する摩擦抵抗力を減少させ、制振に必要な
制御力を低減してアクチュエータの容量を小さくし小形
化できるとともに軸受の寿命を増大することができる振
動制御装置を提供することを目的とする。The present invention has been made to eliminate all of the above-mentioned drawbacks of the conventional technology, and is achieved by applying a non-contact type magnetic support device that utilizes electromagnetic force to a bearing that supports an additional weight. It is an object of the present invention to provide a vibration control device that can reduce the frictional resistance force acting on a weighted weight, reduce the control force necessary for vibration damping, reduce the capacity and size of an actuator, and increase the life of a bearing. purpose.

以下本発明の実施例を図面とともに説明する。Embodiments of the present invention will be described below with reference to the drawings.

第３〜５図において、５１は支持台２３における支持軸
２２の挿通孔２３ａの周辺部に支持軸２２と間隙を介し
て対向するよう設けられた鉄心、５２は鉄心５１に巻回
された励磁コイルで、鉄心５１と励磁コイル５２により
電磁石５を構成する。６はやはり支持台２３に支持軸２
２と対向するよう設けられ、支・持軸２２の静的位置即
ち付加重錘２１の高さ方向位置を検出する位置検出器、
７は電磁石５を駆動制御する電磁石駆動回路で、支持台
２３、電磁石５、位置検出器６および電磁石駆動回路７
によシ磁気支持装置を構成する。In FIGS. 3 to 5, 51 is an iron core provided around the insertion hole 23a of the support shaft 22 in the support base 23 so as to face the support shaft 22 with a gap therebetween, and 52 is an excitation coil wound around the iron core 51. An electromagnet 5 is composed of an iron core 51 and an exciting coil 52. 6 also has the support shaft 2 on the support stand 23.
2, a position detector that detects the static position of the support/holding shaft 22, that is, the height direction position of the additional weight 21;
7 is an electromagnet drive circuit that drives and controls the electromagnet 5, which includes a support base 23, an electromagnet 5, a position detector 6, and an electromagnet drive circuit 7.
A magnetic support device is constructed accordingly.

上記装置において、励磁コイル５２は′Ｉｉ、＠石駆動
回路７から励磁電流を供給され、鉄心５１は支持軸２２
を吸引する。又、この励磁電流は支持軸２２の高さ位置
を検出する位置検出器６からの位置信号によ多制御され
、支持軸２２は支持台２３と互に非接触に保持される。In the above device, the excitation coil 52 is supplied with excitation current from the stone drive circuit 7, and the iron core 51 is connected to the support shaft 22.
aspirate. Further, this excitation current is controlled by a position signal from a position detector 6 that detects the height position of the support shaft 22, and the support shaft 22 and the support base 23 are held in a non-contact manner.

このため、付加重錘２１の全重量はその両端に配設され
た磁気支持装置によシ機械的に接触することなく吸引浮
上するように支持される。従って、構造物１が外力を受
けて水平方向に振動を起すと、この振動は振動検出器３
により検出され、制御回路４を介してアクチュエータ２
５の駆動部２６が作動され、駆動部２６はカップリング
２７および支持軸２２を介して連結された付加重錘２１
に水平方向の振動を加える。この付加重錘２１の振動的
慣性力によシ、アクチュエータ２５が発生する駆動力は
作用反作用の原理に基いて取付台２８および架台２９を
介して構造物１に印加され、構造物１の振動は抑制され
る。そして、付加重錘２１は磁気支持装置によシ完全非
接触で支持されているため、その水平方向の運動に対す
る摩擦抵抗力は皆無で極めて円滑に撮動する。従って、
アクチュエータ２５に袈求される駆動力の容量が低減さ
れるとともに付加重錘２１の支持機構の寿命は長いもの
となる。Therefore, the entire weight of the additional weight 21 is supported by the magnetic support devices disposed at both ends of the additional weight 21 so that it floats under suction without mechanical contact. Therefore, when the structure 1 receives an external force and causes vibration in the horizontal direction, this vibration is detected by the vibration detector 3.
is detected by the actuator 2 via the control circuit 4.
The drive unit 26 of No. 5 is activated, and the drive unit 26 is connected to the additional weight 21 connected via the coupling 27 and the support shaft 22.
Add horizontal vibration to. Due to the vibrational inertia of the additional weight 21, the driving force generated by the actuator 25 is applied to the structure 1 via the mounting base 28 and the pedestal 29 based on the principle of action and reaction. is suppressed. Since the additional weight 21 is supported by the magnetic support device in a completely non-contact manner, there is no frictional resistance against its horizontal movement, and the image is captured very smoothly. Therefore,
The capacity of the driving force exerted on the actuator 25 is reduced, and the life of the support mechanism for the additional weight 21 is extended.

尚、上記実施例では磁気支持装置として電磁石を用いた
ものを示しだが、電磁石と永久磁石を併用したものある
いは永久磁石のみを用いたものでも同様の効果を有する
。Although the above embodiment uses an electromagnet as the magnetic support device, the same effect can be obtained by using both an electromagnet and a permanent magnet or using only a permanent magnet.

以上のように本発明においては、磁気支持装置によシ付
加重錘を磁気的に浮上らせて支持しておシ、これによシ
付加重錘を完全非接触で支持することができる。このた
め、付加重錘の動きは極めて円滑になシ、精度の高い振
動抑制が得られるとともに、アクチュエータの容量が小
さくて良いので小形化が可能であシ、かつ付加重錘の支
持機構の寿命も長いものとなり、信頼性の高い振動制御
装置が得られる。As described above, in the present invention, the additional weight is magnetically levitated and supported by the magnetic support device, and thereby the additional weight can be supported completely without contact. Therefore, the movement of the additional weight is extremely smooth, highly accurate vibration suppression is achieved, and the actuator only requires a small capacity, so it can be downsized, and the support mechanism for the additional weight has a long lifespan. Since the vibration control device is also long, a highly reliable vibration control device can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は一般的な振動制御装置の基本構成図、第２図は
従来の付加重錘駆動装置の構成図、第３図および第４図
は夫々本発明に係る付加重錘駆動装置の縦断正面図およ
びそのＡ−Ａ線縦断側面図、第５図は本発明に係る振動
制御装置の構成図である。 １・・・構造物、２・・・付加重錘駆動装置、３・・・
振動検出器、４・・・制御回路、５・・・電磁石、６・
・・位置検出器、７・・・電磁石駆動回路、２１・・・
付加重錘、２２・・・支持軸、２３・・・支持台、２５
・・・アクチュエータ、２６・・・駆動部、２７・・・
カップリング、２８・・・取付台、２９・・・架台、５
１・・・鉄心、５２・・・励磁コイル。 尚、図中同一符号は同−又は相肖部分を示す。 代理人　　葛　野　信　− 第１図 第３図 どソ 第４図 ９FIG. 1 is a basic configuration diagram of a general vibration control device, FIG. 2 is a configuration diagram of a conventional additional weight drive device, and FIGS. 3 and 4 are longitudinal sections of the additional weight drive device according to the present invention, respectively. A front view, a longitudinal sectional side view taken along the line A-A, and FIG. 5 are configuration diagrams of a vibration control device according to the present invention. 1... Structure, 2... Additional weight drive device, 3...
Vibration detector, 4... Control circuit, 5... Electromagnet, 6.
...Position detector, 7...Electromagnet drive circuit, 21...
Additional weight, 22... Support shaft, 23... Support stand, 25
...actuator, 26...driver, 27...
Coupling, 28... Mounting stand, 29... Frame, 5
1... Iron core, 52... Excitation coil. Note that the same reference numerals in the figures indicate the same or similar parts. Agent Shin Kuzuno - Figure 1 Figure 3 Doso Figure 4 9

Claims (1)

【特許請求の範囲】[Claims] （１）撮動可能に支持された付加重錘、構造物に装着さ
れ構造物の振動を検出する振動検出器、構造物に取付け
られ振動検出器の出力に応じて付加重錘に構造物の振動
に対抗する振動を加えるアクチュエータを備え、構造物
の振動を抑制するようにした振動制御装置において、付
加重錘を磁気的に浮上らせて支持する磁気支持装置を備
えたことを特徴とする振動制御装置。(1) An additional weight that is supported so that it can be photographed, a vibration detector that is attached to the structure and detects the vibration of the structure, and an additional weight that is attached to the structure and detects the vibration of the structure according to the output of the vibration detector. A vibration control device that includes an actuator that applies vibrations to counter vibrations and suppresses vibrations of a structure, characterized by comprising a magnetic support device that magnetically levitates and supports an additional weight. Vibration control device.