DE2605476A1 - Vibration damper with out of phase resistance - has vibration sensors producing functional signals linked to analogue computer - Google Patents

Vibration damper with out of phase resistance - has vibration sensors producing functional signals linked to analogue computer

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Publication number
DE2605476A1
DE2605476A1 DE19762605476 DE2605476A DE2605476A1 DE 2605476 A1 DE2605476 A1 DE 2605476A1 DE 19762605476 DE19762605476 DE 19762605476 DE 2605476 A DE2605476 A DE 2605476A DE 2605476 A1 DE2605476 A1 DE 2605476A1
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Germany
Prior art keywords
vibration damping
elastic
vibration
active vibration
drive elements
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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
Application number
DE19762605476
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German (de)
Inventor
Johann Prof Dr I Kleinwaechter
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to DE19762605476 priority Critical patent/DE2605476A1/en
Publication of DE2605476A1 publication Critical patent/DE2605476A1/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The vibration damper comprises a motor which exerts on the vibrating system (1) and oscillation of equal frequency but of opposite phase. The original vibration is detected by sensors (3, 4, or 5) whose output is led to an analogue computer (6) for effecting the phase change. The output of the computer energises the motor (2). The sensors are such as to produce a signal being a function of the velocity (S) of the vibrating system. Thus there may be a sensor (3) for the velocity itself, or a sensor (4) for acceleration, or a sensor (5) for the torque, the latter being a function of velocity.

Description

PatentbeschreibungPatent description

Titel: "Aktive Schwingungsdämpfung elastischer Antriebselemente" Mechanische Bauelemente zur übertragung von Kräften und Bewegungen werden entweder nach ausreichender mechanischer Festigkeit oder nach zulässiger elastischer Deformation dimensioniert.Title: "Active vibration damping of elastic drive elements" Mechanical Components for the transmission of forces and movements are either after sufficient mechanical strength or dimensioned according to permissible elastic deformation.

Bei schlanken Bauelementen, wie sie z.B. bei Hebezeugen verwendet werden, können auch bei ausraichenderBiegefestigkeit von Konstruktionsstäben deren Biegeschwingungen zu unerträglichenStörungen fuhren. Da derartige Biegeschwingungen wegen der guten Elastizität des Stabmaterials nur eine geringe Eigendämpfung aufweisen, stellen sich z.B. bei motorisch angetriebenen Mechanismen mit Positions- und Laufgeschwindigkeit oder Kraftrückführung bei grösserer Verstärkung des Regelkreises angefachte mechanische Schwingungen ein, die das Pegelsystemunbrauchbar machen.With slim components, such as those used in hoists can also be used with sufficient flexural strength of construction rods Flexural vibrations lead to unbearable disturbances. Since such flexural vibrations due to the good elasticity of the rod material have only a low level of internal damping, arise e.g. with motor-driven mechanisms with position and running speed or force feedback with greater amplification of the control loop fanned mechanical Vibrations that make the level system unusable.

Um schwingungsfähige elastische Bauelemente (1) aktiv zu bedämpfen, werden erfindungsgemäss Motore verwendet, die periodiscKräfte geeigneter Amplitude und Phase auf das schwingungsfähige Bauteil so ausüben, dass dem System Schwingungsenergie entzogen wird. Häufig lassen sich die Antriebsmotore (2) für die einzelnen Freiheitsgrade durch eine zusätzlich oszillierende Kraft gleichzeitig zum Antrieb und zur Schwingungsdämpfung benützen. Die oszillierende Kraft F darf dabei nicht mit der Durchfederung S in Phase sein, weil dies nur eine änderungder-Eigenfrequenz des Schwingungssystemes bewirken würde, da die mittlereOszillatorleistung L bei 90° Phasenverschiebung zwischen F und 5 ist. In order to actively damp vibratory elastic components (1), according to the invention, motors are used which exert periodic forces of suitable amplitude and phase on the vibratable component in such a way that vibrational energy is withdrawn from the system. Often the drive motors (2) for the individual degrees of freedom can be used simultaneously for drive and vibration damping by an additional oscillating force. The oscillating force F must not be in phase with the deflection S because this would only cause a change in the natural frequency of the oscillation system, since the mean oscillator power L is between F and 5 at a phase shift of 90 °.

Um dem System durch die oszillierende Kraft F Schwingungsenergie zu entziehen, muss F und 5 in Phase, d.h. F und S um 900 phasenverschoben sein.To the system through the oscillating force F vibration energy withdraw, F and 5 must be in phase, i.e. F and S must be 900 out of phase.

Erfindungsgemäss sollen~mittels besonderer Sensoren Signale gewonnen werden, die mit 5 in Phase sind. Dies können z.B. sein: a) Geschwindigkeitssensoren (3), die im Schwingungsbauch des Konstruktionsstabes (1) montiert sind, und die direkt Signals proportional S liefern.According to the invention, signals are to be obtained by means of special sensors who are in phase with 5. These can be, for example: a) speed sensors (3), which are mounted in the antinode of the construction rod (1), and the directly supply signal proportional to S.

b) Beschleunigungssensoren -(4), die ebenfalls im Schwingungsbauch mon tiert sind und die 5 liefern.b) Accelerometers - (4), which are also in the antinode are assembled and deliver the 5.

c) Drehmomentensensoren (5), die das zu 6 proportionale Drehmoment im Schwingungsknoten messem.c) Torque sensors (5), the torque proportional to 6 messem in the vibration node.

Aus S muss in den Fällen b) und c) mittels Analogrechner ein zu 8 um 900 voreilendes und somit zu S in Phase schwingendes Signal gebildat werden. Da bei der Integration des messtechnisch zugänglichen S , nur bis auf eine unbestimmte Integrationskonstante definiert ist, kann das mit 5 gleichphasige Dämpfungssignal nur durch Differentiation von S erhalten werden. Somit ist das Regelverhalten dieser aktiven bedämpfen Schwingungssystemes durch eine Differentialgleichung 3.In cases b) and c), S must be converted to 8 using an analog computer Signal leading by 900 and thus oscillating in phase with S can be formed. As with the integration of the metrologically accessible S, only with the exception of an indefinite one Integration constant is defined, the damping signal in phase with 5 can only be obtained by differentiating S. Thus, the control behavior is this active damping vibration system by a differential equation 3.

nung beschrieben, dsrsn Lösungen nur für bestimmte Parameter gedämpft sind.tion described, dsrsn solutions damped only for certain parameters are.

Claims (5)

Patentansprüche zur Patentbeschreibung:tAktive Schwingungsdämpfung elastischer Antriebselemente" 1. Vorrichtung zu aktiver Schwingungsdämpfung slastischer Antriebselsmente, d a d u r c h g e k e n n z e i c h n e t, dass mittels Motoren oszillierende Kräfte auf das elastische Bauteil ausgeübt werden, die die Schwingungsenergie den elastischen Bauteilen entziehen.Claims relating to the patent description: active vibration damping elastic drive elements "1. Device for active vibration damping slastischer Antriebelsmente, d u r c h e k e n n e n g e i c h n e t, that by means of motors oscillating forces are exerted on the elastic component, which reduce the vibration energy remove the elastic components. 2. Vorrichtung zu aktiver Schwingungsdampfung elastischer Antriebsslements nach Anspruch 1), d a d u r c h g e k e n n z e i c h n e t, dass die Motoren gleichzeitig zum Antrieb und zur aktiven Schwingungsdämpfung benutzt werden.2. Device for active vibration damping of elastic drive elements according to claim 1), d u r c h g e k e n n n z e i c h n e t that the motors simultaneously can be used for drive and active vibration damping. 3. Vorrichtung zu aktiver Schwingungsdampfuny elastischer Antriebselemente nach Anspruch 1) und 2), d a d u r c h g e k e n n z e i c hn e t, dass die Signale für die schwingungsdämPfenden Kräfte von Geschwindigkeitssensoren, die vornehmlich im Schwingungsbauch der elastischen Bauteile angebracht sind, geliefert werden.3. Device for active vibration damping of elastic drive elements according to claim 1) and 2), that the signals for the vibration damping forces of speed sensors, which are primarily are attached in the antinode of the elastic components. 4. Vorrichtung zu aktiver Schwingungsdampfung elastischer Antriebselemente nach Anspruch 1) und 2), d a d u r c h g e k e n n z e i c hn e t, dass die Signale für die schwingungsdämpfenden Kräfte von Beschleunigungssensoren, die vornehmlich im Schwingungsbauch der elastischen Bauteile angebracht sind, durch zeitliche Differentiation geliefert werden.4. Device for active vibration damping of elastic drive elements according to claim 1) and 2), that the signals for the vibration-damping forces of acceleration sensors, which are primarily are attached in the antinode of the elastic components by time differentiation to be delivered. 5. Vorrichtung zu aktiver Schwingungsdämpfung elastischer Antriebselemente nach Anspruch 1) und 2), d a d u r c h g e k e n n z e i c n e t, t, dass die Signale für die schNingungsdämpfendenKräfte von Drehmomentensensoren, die vornehmlich im Schwingungsknoten der elastischen Bauteile angebracht sind, durch zeitliche Differenzierung geliefert werden.5. Device for active vibration damping of elastic drive elements according to claim 1) and 2), that the signals for the vibration damping forces of torque sensors, which are mainly used in Vibration nodes of the elastic components are attached by time differentiation to be delivered.
DE19762605476 1976-02-12 1976-02-12 Vibration damper with out of phase resistance - has vibration sensors producing functional signals linked to analogue computer Pending DE2605476A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762605476 DE2605476A1 (en) 1976-02-12 1976-02-12 Vibration damper with out of phase resistance - has vibration sensors producing functional signals linked to analogue computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762605476 DE2605476A1 (en) 1976-02-12 1976-02-12 Vibration damper with out of phase resistance - has vibration sensors producing functional signals linked to analogue computer

Publications (1)

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DE2605476A1 true DE2605476A1 (en) 1977-08-18

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2902376A1 (en) * 1978-01-24 1979-07-26 Gelij Michailovitsch Ivanov DEVICE FOR VIBRATION DAMPING
DE3142424A1 (en) * 1980-10-27 1982-07-08 Aktiebolaget Bofors, 69180 Bofors DEVICE REDUCTION DEVICE
EP0062767A1 (en) * 1981-04-08 1982-10-20 Krupp Stahl Aktiengesellschaft Electric arc furnace
DE4234928A1 (en) * 1992-10-16 1994-04-21 Heidelberger Druckmasch Ag Device and method for damping mechanical vibrations of printing machines
US5596931A (en) * 1992-10-16 1997-01-28 Heidelberger Druckmaschinen Ag Device and method for damping mechanical vibrations of a printing press
DE19620439C2 (en) * 1995-05-30 2001-02-01 Siemens Ag Process for damping mechanical vibrations
WO2002045891A1 (en) * 2000-12-08 2002-06-13 Sandvik Aktiebolag Method and device for the damping of vibration in a cutting tool
DE10204763A1 (en) * 2002-02-05 2003-08-14 Kuesters Eduard Maschf Method for actively damping vibrations in a device for processing a running web, device suitable for carrying out this method and roller suitable for use in this device
EP1493985A1 (en) * 2003-07-02 2005-01-05 Giat Industries Device for the active attenuation of vibrations of a gun

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2902376A1 (en) * 1978-01-24 1979-07-26 Gelij Michailovitsch Ivanov DEVICE FOR VIBRATION DAMPING
DE3142424A1 (en) * 1980-10-27 1982-07-08 Aktiebolaget Bofors, 69180 Bofors DEVICE REDUCTION DEVICE
EP0062767A1 (en) * 1981-04-08 1982-10-20 Krupp Stahl Aktiengesellschaft Electric arc furnace
DE4234928A1 (en) * 1992-10-16 1994-04-21 Heidelberger Druckmasch Ag Device and method for damping mechanical vibrations of printing machines
US5596931A (en) * 1992-10-16 1997-01-28 Heidelberger Druckmaschinen Ag Device and method for damping mechanical vibrations of a printing press
DE19620439C2 (en) * 1995-05-30 2001-02-01 Siemens Ag Process for damping mechanical vibrations
WO2002045891A1 (en) * 2000-12-08 2002-06-13 Sandvik Aktiebolag Method and device for the damping of vibration in a cutting tool
KR100844095B1 (en) * 2000-12-08 2008-07-04 산드빅 인터렉츄얼 프로퍼티 에이비 Method and device for the damping of vibration in a cutting tool
US7647853B2 (en) 2000-12-08 2010-01-19 Sandvik Akiebolag Metal cutting apparatus and method for damping feed-back vibrations generated thereby
DE10204763A1 (en) * 2002-02-05 2003-08-14 Kuesters Eduard Maschf Method for actively damping vibrations in a device for processing a running web, device suitable for carrying out this method and roller suitable for use in this device
EP1493985A1 (en) * 2003-07-02 2005-01-05 Giat Industries Device for the active attenuation of vibrations of a gun
FR2857071A1 (en) * 2003-07-02 2005-01-07 Giat Ind Sa DEVICE FOR ACTIVE AMORTIZATION OF A SECONDARY MOTORIZED ARM

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