JPH02310443A - Torsional oscillation tester - Google Patents
Torsional oscillation testerInfo
- Publication number
- JPH02310443A JPH02310443A JP13009689A JP13009689A JPH02310443A JP H02310443 A JPH02310443 A JP H02310443A JP 13009689 A JP13009689 A JP 13009689A JP 13009689 A JP13009689 A JP 13009689A JP H02310443 A JPH02310443 A JP H02310443A
- Authority
- JP
- Japan
- Prior art keywords
- output shaft
- torsional
- actuator
- detector
- acceleration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 title abstract 4
- 238000012360 testing method Methods 0.000 claims abstract description 58
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 abstract description 29
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は捩り振動試験機に係り、より詳細には、自動車
に使用されるトーショナルダンパ、ダンパプーリなどの
弾性部材に捩り振動を加えたときの共振点を測定するた
めの捩り振動試験機に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a torsional vibration testing machine, and more specifically, it relates to a torsional vibration testing machine, and more specifically, torsional vibration testing equipment when applying torsional vibration to an elastic member such as a torsional damper or damper pulley used in an automobile. This invention relates to a torsional vibration testing machine for measuring the resonance point of.
従来この種の試験機として第３図に示すものが知られて
いる。同図において、地面などの基礎に据え付けられる
架台１の上面に、サーボ弁２ａを有する捩りアクチェエ
ータ２が設置されている。Conventionally, as this type of testing machine, the one shown in FIG. 3 is known. In the figure, a torsion actuator 2 having a servo valve 2a is installed on the top surface of a pedestal 1 installed on a foundation such as the ground.
捩りアクチュエータ２の出力軸２ｂには、棒状の試験体
３を片持ち支持する連結金具４ａを有するフランジ４が
、加速度検出器５を介して連結されている。A flange 4 having a connecting fitting 4a that supports a rod-shaped test object 3 in a cantilevered manner is connected to the output shaft 2b of the torsional actuator 2 via an acceleration detector 5.
また、捩りアクチュエータ２には角度検出器７が、試験
体３の自由端に加速度検出器８がそれぞれ取付けられて
おり、角度検出器７によって捩りアクチュエータ２の出
力軸２ｂの角度が検出されるようになっている。An angle detector 7 is attached to the torsional actuator 2, and an acceleration detector 8 is attached to the free end of the test body 3, so that the angle of the output shaft 2b of the torsional actuator 2 is detected by the angle detector 7. It has become.
上述した構成の試験機を第５図に示す制御装置により動
作させることによって試験体の共振点が測定される。す
なわち、掃引信号発生器１１がらの一定周波数の信号は
、振幅調整器１２、加算器１３及びサーボ増幅器１４を
介してサーボ弁２ａに印加される。サーボ弁２ａは上記
信号の周波数に応じて油圧源１５からの油圧を切り換え
て捩りアクチュエータ２に加え、その出力軸２ｂを掃引
信号発生器１１からの信号の周波数に応じて正逆転させ
る。この出力軸２ｂが正逆転すると、角度検出器７から
出力軸２ｂの正逆転に応じた周波数の信号が出力される
。この信号は角度増幅器１６により増幅され加算器１３
において振幅調整器１２からの信号と加算される。よっ
て、出力軸２ｂは掃引信号発生器１１からの信号の周波
数に同期して正逆転するように制御される。The resonance point of the test object is measured by operating the testing machine having the above-mentioned configuration using the control device shown in FIG. That is, a constant frequency signal from the sweep signal generator 11 is applied to the servo valve 2a via the amplitude adjuster 12, the adder 13, and the servo amplifier 14. The servo valve 2a switches the hydraulic pressure from the hydraulic source 15 and applies it to the torsional actuator 2 according to the frequency of the signal, and rotates its output shaft 2b in the forward and reverse directions according to the frequency of the signal from the sweep signal generator 11. When the output shaft 2b rotates in the forward or reverse direction, the angle detector 7 outputs a signal with a frequency corresponding to the forward or reverse rotation of the output shaft 2b. This signal is amplified by an angle amplifier 16 and an adder 13
It is added to the signal from the amplitude adjuster 12 at . Therefore, the output shaft 2b is controlled to rotate forward and reverse in synchronization with the frequency of the signal from the sweep signal generator 11.
一方、出力軸２ｂが正逆転すると、この正逆転が出力軸
２ｂに取付けた加速度検出器５により検出され、その検
出出力が加速度増幅器１７により増幅されて振幅検出回
路１８に入力される。振幅検出回路１８はその入力に印
加される信号をエンベロープ検波してその検波出力を加
算器１９に供給し、検波出力は加速度設定器２０におい
て予め設定される加速度振幅信号と加算される。加算器
１９の出力信号は積分器２１で積分された後振幅調整器
１２に入力される。振幅調整器１２は積分器２１からの
信号により掃引信号発生器１１からの振幅を制御して加
速度設定器２０によって設定された加速度振幅を保つよ
うに制御する。従って、捩りアクチュエータ２は掃引信
号発生器１１が発生する信号の周波数と、加速度設定器
２０によって設定された加速度とで出力軸２ｂを正逆転
させる。なお、上記出力軸２ｂの加速度αはαＣｘ−（
周波数ｒ）” ｘ （角度θ）で表せる。On the other hand, when the output shaft 2b rotates forward or reverse, this forward or reverse rotation is detected by the acceleration detector 5 attached to the output shaft 2b, and the detected output is amplified by the acceleration amplifier 17 and input to the amplitude detection circuit 18. The amplitude detection circuit 18 performs envelope detection on the signal applied to its input and supplies the detection output to the adder 19, and the detection output is added to an acceleration amplitude signal set in advance in the acceleration setting device 20. The output signal of the adder 19 is integrated by an integrator 21 and then input to the amplitude adjuster 12. The amplitude adjuster 12 controls the amplitude from the sweep signal generator 11 using the signal from the integrator 21 to maintain the acceleration amplitude set by the acceleration setter 20. Therefore, the torsional actuator 2 rotates the output shaft 2b in the forward and reverse directions at the frequency of the signal generated by the sweep signal generator 11 and the acceleration set by the acceleration setting device 20. Note that the acceleration α of the output shaft 2b is αCx−(
It can be expressed as frequency r)” x (angle θ).
上記出力軸２ｂの正逆転の周波数を可変していくとき、
加速度を一定に保つには出力軸２ｂの回転角度を変化さ
せる必要があるので、加速度検出器５からの出力をフィ
ードバックしている。When varying the frequency of forward and reverse rotation of the output shaft 2b,
In order to keep the acceleration constant, it is necessary to change the rotation angle of the output shaft 2b, so the output from the acceleration detector 5 is fed back.
また、捩りアクチュエータ２が上述したように動作する
と、加速度検出器５及び加速度検出器８からの加速度信
号が共に演算回路２２に入力される。演算回路２２は加
速度信号をＡ／Ｄ変換によりデジタル信号に変換し、こ
のデジタル変換した加速度検出器８からの信号により第
６図（ａ）に示す振幅と、加速度検出器５からの信号に
より第６図（ｂ）に示す振幅との比の絶対値を演算して
、第６図（Ｃ）に示すデータを求め、このデータの最大
値から共振周波数ｆ０を求める。Further, when the torsional actuator 2 operates as described above, acceleration signals from the acceleration detector 5 and the acceleration detector 8 are both input to the calculation circuit 22. The arithmetic circuit 22 converts the acceleration signal into a digital signal by A/D conversion, and uses the digitally converted signal from the acceleration detector 8 to generate the amplitude shown in FIG. The absolute value of the ratio with the amplitude shown in FIG. 6(b) is calculated to obtain the data shown in FIG. 6(C), and the resonant frequency f0 is determined from the maximum value of this data.
ところで、上述した従来の試験機においては、涙すアク
チュエータ２の出力軸２ｂが水平に配置され、その先端
に加速度検出器５を介して連結金具４ａを有するフラン
ジ４が取付けられた片持ち梁構造をなしているので、捩
りアクチュエータ２の動作時に横振動が生じる。By the way, in the above-mentioned conventional testing machine, the output shaft 2b of the actuator 2 is arranged horizontally, and has a cantilever structure in which the flange 4 having the connecting fitting 4a is attached to the tip via the acceleration detector 5. Therefore, lateral vibration occurs when the torsional actuator 2 operates.
なお、上記連結金具４ａには、第４図に示すように該連
結金具４ａによって片持ち支持される試験体３を挟んで
対称な位置に加速度検出器６ａ及び６ｂがそれぞれ取付
けられている。Incidentally, as shown in FIG. 4, acceleration detectors 6a and 6b are respectively attached to the connecting fitting 4a at symmetrical positions with the test specimen 3 supported in a cantilever manner by the connecting fitting 4a.
上述のような横振動が生じる場合には、試験体を装着し
て実際に試験に入る前に捩りアクチュエータ２の動作周
波数を掃引し、捩りアクチュエータ２単体で動作させた
とき、２つの加速度検出器６ａ及び６ｂの出力信号の位
相差により捩りアクチュエータ２単体の共振の度合いを
チェックしてみると、第７図に示すように共振点で位相
差が大きくなり、７〜１０°の位相差が現れる。If the above-mentioned lateral vibration occurs, sweep the operating frequency of the torsional actuator 2 before mounting the test object and actually starting the test, and when operating the torsional actuator 2 alone, the two acceleration detectors When checking the degree of resonance of the torsional actuator 2 alone based on the phase difference between the output signals of 6a and 6b, the phase difference becomes large at the resonance point and a phase difference of 7 to 10 degrees appears as shown in Figure 7. .
このような大きな位相差が生じるような横振動があると
、試験体の共振試験時に捩りアクチュエータ単体の振動
が試験体に重畳して試験体の共振点を正確に測定するこ
とを困難にする。If there is lateral vibration that causes such a large phase difference, the vibration of the torsional actuator alone will be superimposed on the test object during resonance testing of the test object, making it difficult to accurately measure the resonance point of the test object.
共振点の測定を正確に行うには、捩りアクチュエータ単
体の作動時の上記加速度検出器６ａ及び６ｂ間の位相差
が１°以内であることが必要である。これは、周波数の
小さい範囲では架台を大きくしたり涙すアクチュエータ
２の取付は剛性を高めれば可能である。しかし、周波数
が４００ Ｈｚ以上になると、どうしても横振動の影響
がでてしまい高精度の試験を行うことができないという
問題があった。In order to accurately measure the resonance point, it is necessary that the phase difference between the acceleration detectors 6a and 6b be within 1° when the torsional actuator is operated alone. This can be done by increasing the size of the frame and increasing the rigidity of the actuator 2 in the low frequency range. However, when the frequency exceeds 400 Hz, the influence of lateral vibration inevitably appears, making it impossible to perform highly accurate tests.
よって本発明は、上述した従来の問題点に鑑み、簡単な
構成によって横振動の影響を解消して高精度の試験を行
えるようにした捩り振動試験機を提供することを課題と
している。SUMMARY OF THE INVENTION Therefore, in view of the above-mentioned conventional problems, an object of the present invention is to provide a torsional vibration testing machine that has a simple configuration, eliminates the effects of lateral vibration, and is capable of performing highly accurate tests.
上記課題を解決するため本発明により成された捩り振動
試験機は、空気バネなどの弾性体を介して地面などの基
礎に据え付けられる架台の上面に設置された捩りアクチ
ュエータを備え、該捩りアクチュエータの出力軸を正逆
転して試験体に周波数を変えながら涙り振動を加え、試
験体の共振点を測定する捩り試験機であって、前記涙り
アクチュエータを、その出力軸に試験体を片持ち支持し
、かつ該出力軸が垂直になるように前記課題上に配置し
たことを特徴としている。In order to solve the above problems, a torsional vibration testing machine according to the present invention includes a torsional actuator installed on the top surface of a mount that is installed on a foundation such as the ground via an elastic body such as an air spring. This is a torsional testing machine that measures the resonance point of the test piece by applying tear vibration to the test piece while changing the frequency by rotating the output shaft forward and backward, and the test piece is cantilevered on the output shaft with the tear actuator It is characterized in that it is supported and placed on the subject so that the output shaft is perpendicular.
上記構成において、試験体を片持ち支持して試験体に周
波数を変えながら捩り振動を加える捩りアクチュエータ
の出力軸が垂直になるように捩りアクチュエータが架台
上に配置されているので、出力軸が正逆転しても横振動
が発生することがなくなり、捩りアクチュエータの出力
軸を正逆転して試験体に周波数を変えながら捩り振動を
加えて行う試験体の共振点測定が正確に行うことができ
る。In the above configuration, the torsion actuator is placed on the stand so that the output axis of the torsion actuator, which cantilever-supports the test piece and applies torsional vibration to the test piece while changing the frequency, is vertical, so the output axis is vertical. Transverse vibrations do not occur even when reversed, and the resonance point of the test object can be accurately measured by applying torsional vibration to the test object while changing the frequency by reversing the output shaft of the torsional actuator.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図及び第２図は本発明による捩り振動試験機の一実
施例を示す図であり、同図において、第３図について上
述したものと同等の部分には同一の符号を付している。Figures 1 and 2 are diagrams showing an embodiment of the torsional vibration testing machine according to the present invention, and in the figures, the same parts as those described above with respect to Figure 3 are given the same reference numerals. .
第１図及び第２図において、地面などの基礎に空気バネ
９を介して据え付けられる架台１の上面に、サーボ弁２
を有する捩りアクチュエータ２が設置されている。架台
１上への捩りアクチュエータ２の設置は、その出力軸２
ｂが垂直になるように行われ、該出力軸２ｂの上端には
、棒状の試験体３を垂直に片持ち支持する連結金具４ａ
を有するフランジ４が、加速度検出器５を介して連結さ
れている。In FIGS. 1 and 2, a servo valve 2 is mounted on the top surface of a pedestal 1 that is installed on a foundation such as the ground via an air spring 9.
A torsion actuator 2 is installed. When installing the torsional actuator 2 on the pedestal 1, its output shaft 2
b is vertical, and at the upper end of the output shaft 2b is a connecting fitting 4a that vertically supports the rod-shaped test specimen 3 in a cantilever manner.
A flange 4 having a flange 4 is connected via an acceleration detector 5.
また、捩りアクチュエータ２には角度検出器７が、試験
体３の自由端に加速度検出器８がそれぞれ取付けられて
おり、角度検出器７によって捩りアクチュエータ２の出
力軸２ｂの角度が検出されるようになっている。なお、
１ｏは油圧の脈動や流量の補償を行うアキュムレータで
ある。An angle detector 7 is attached to the torsional actuator 2, and an acceleration detector 8 is attached to the free end of the test body 3, so that the angle of the output shaft 2b of the torsional actuator 2 is detected by the angle detector 7. It has become. In addition,
1o is an accumulator that compensates for oil pressure pulsation and flow rate.
以上の構成の捩り振動試験機は第３図に示した従来の試
験機と同様に、第５図に示した制御装置により動作され
て試験体の共振点の測定を行うために使用される。The torsional vibration testing machine having the above configuration is operated by the control device shown in FIG. 5 and used to measure the resonance point of the test object, similarly to the conventional testing machine shown in FIG. 3.
そして、試験体３に捩り振動を加えるため正逆転される
涙りアクチュエータ２の出力軸２ｂが垂直になっていて
、その上端に試験体３を片持ち支持する連結金具４ａを
有するフランジ４が加速度検出器５を介して取付けられ
た縦型構造となって ｄいるので、出力軸２ｂを水平
にしたもののような横振動が捩り振動試験機単体で生じ
ることがない。The output shaft 2b of the tear actuator 2, which is rotated forward and backward in order to apply torsional vibration to the test object 3, is vertical, and the flange 4, which has a connecting fitting 4a that cantilever supports the test object 3 at its upper end, is Since it has a vertical structure attached via the detector 5, the torsional vibration tester alone does not generate lateral vibrations as would occur when the output shaft 2b is horizontal.
なお、共振チェックを行う場合には、連結金具４ａに対
し、該連結金具４ａによって片持ち支持される試験体３
を挟んで対称な位置に加速度検出器６ａ及び６ｂをそれ
ぞれ取付ける。In addition, when performing a resonance check, the test specimen 3 that is cantilever-supported with respect to the connecting fitting 4a is
Acceleration detectors 6a and 6b are respectively installed at symmetrical positions with the two sides in between.
従って、試験体３に実際に涙り振動を加えて加速度検出
器５及び８からの加速度検出信号に基づいてサーボ制御
したり、共振点測定のためのデータを収集する際、信号
やデータに乱れが生じないので、試験体の共振点を正確
に測定することができるようになる。Therefore, when actually applying tear vibration to the test object 3 and performing servo control based on the acceleration detection signals from the acceleration detectors 5 and 8, or when collecting data for resonance point measurement, the signals and data may be disturbed. Since this does not occur, it becomes possible to accurately measure the resonance point of the test object.
［効果］
以上説明したように本発明によれば、捩りアクチュエー
タをその出力軸が垂直になるように架台上に配置すると
いう簡単な構成によって、試験体を片持ち支持する出力
軸を正逆転しても出力軸に横振動が発生することがなく
なり、正確な試験体の共振点測定が可能になる。[Effect] As explained above, according to the present invention, the output shaft that supports the test specimen cantilevered can be rotated in the forward and reverse directions by a simple configuration in which the torsion actuator is arranged on the stand so that its output shaft is vertical. This eliminates the occurrence of lateral vibration on the output shaft even when the test piece is in use, making it possible to accurately measure the resonance point of the test piece.
第１図及び第２図は本発明による捩り振動試験機の構成
を示す図、
第３図は従来の捩り振動試験機の構成例を示す図、
第４図は共振チェックのために使用する加速度検出器の
取付は構造を示す図、
第５図は捩り振動試験機により試験体の共振点の測定を
行うために使用する制御装置の構成例を示すブロック図
、
第６図は第５図の装置による共振点測定方法を説明する
ための図、
第７図は第３図の従来の試験機の問題点を説明するため
の図である。
１・・・架台、２・・・捩りアクチュエータ、２ａ・・
・サーボ弁、２ｂ・・・出力軸、３・・・試験体。
特許出願人 株式会社鷺宮製作所第１図
第４図Figures 1 and 2 are diagrams showing the configuration of a torsional vibration testing machine according to the present invention, Figure 3 is a diagram showing an example of the configuration of a conventional torsional vibration testing machine, and Figure 4 is an acceleration diagram used for resonance checking. Figure 5 is a block diagram showing an example of the configuration of a control device used to measure the resonance point of a test specimen using a torsional vibration tester. Figure 6 is a diagram showing the structure of the detector installation. FIG. 7 is a diagram for explaining the resonance point measurement method using the apparatus. FIG. 7 is a diagram for explaining the problems of the conventional testing machine shown in FIG. 3. 1... Frame, 2... Torsional actuator, 2a...
- Servo valve, 2b...output shaft, 3...test specimen. Patent applicant: Saginomiya Seisakusho Co., Ltd. Figure 1 Figure 4
Claims (1)
けられる架台の上面に設置された捩りアクチュエータを
備え、該捩りアクチュエータの出力軸を正逆転して試験
体に周波数を変えながら捩り振動を加え、試験体の共振
点を測定する捩り試験機において、 前記捩りアクチュエータを、その出力軸に試験体を片持
ち支持し、かつ該出力軸が垂直になるように前記架台上
に配置した、 ことを特徴とする捩り振動試験機。[Scope of Claims] A torsion actuator is installed on the top surface of a pedestal that is installed on a foundation such as the ground via an elastic body such as an air spring, and the output shaft of the torsion actuator is forward and reversed to apply a frequency to the test specimen. In a torsion testing machine that measures the resonance point of a test specimen by applying torsional vibration while changing the torsion actuator, the test specimen is cantilever-supported on its output shaft, and the torsion actuator is mounted on the mount so that the output shaft is vertical. A torsional vibration testing machine characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13009689A JPH02310443A (en) | 1989-05-25 | 1989-05-25 | Torsional oscillation tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13009689A JPH02310443A (en) | 1989-05-25 | 1989-05-25 | Torsional oscillation tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02310443A true JPH02310443A (en) | 1990-12-26 |
Family
ID=15025862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13009689A Pending JPH02310443A (en) | 1989-05-25 | 1989-05-25 | Torsional oscillation tester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02310443A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002048202A (en) * | 2000-05-24 | 2002-02-15 | Ge Medical Systems Global Technology Co Llc | Method and device for adjusting tension of wrapping member in wrapping connector driving mechanism, method and device for measuring tension of wrapping member, and ct equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6469923A (en) * | 1987-09-11 | 1989-03-15 | Saginomiya Seisakusho Inc | Method for measuring resonance point of resonating member |
-
1989
- 1989-05-25 JP JP13009689A patent/JPH02310443A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6469923A (en) * | 1987-09-11 | 1989-03-15 | Saginomiya Seisakusho Inc | Method for measuring resonance point of resonating member |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002048202A (en) * | 2000-05-24 | 2002-02-15 | Ge Medical Systems Global Technology Co Llc | Method and device for adjusting tension of wrapping member in wrapping connector driving mechanism, method and device for measuring tension of wrapping member, and ct equipment |
| JP4602571B2 (en) * | 2000-05-24 | 2010-12-22 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | Winding member tension adjusting method and apparatus for winding power transmission mechanism, winding member tension measuring method and apparatus, and CT apparatus |
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