LT5726B - Piezoelectric damping system of oscillations - Google Patents

Piezoelectric damping system of oscillations Download PDF

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Publication number
LT5726B
LT5726B LT2009051A LT2009051A LT5726B LT 5726 B LT5726 B LT 5726B LT 2009051 A LT2009051 A LT 2009051A LT 2009051 A LT2009051 A LT 2009051A LT 5726 B LT5726 B LT 5726B
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Lithuania
Prior art keywords
piezoelectric
damping system
control unit
vibration damping
electrodes
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LT2009051A
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Lithuanian (lt)
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LT2009051A (en
Inventor
Ramutis BANSEVIČIUS
Algimantas BUBULIS
Vilen P. ROIZMAN
Vytautas JURĖNAS
Paulius JAKAITIS
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Kauno technologijos universitetas, ,
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Priority to LT2009051A priority Critical patent/LT5726B/en
Publication of LT2009051A publication Critical patent/LT2009051A/en
Publication of LT5726B publication Critical patent/LT5726B/en

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Abstract

The invention relates to not stationary electronic devices. System comprises a frame (1) in which is fixed damping element (2), on the surface of mentioned element is fixed piezoelement (3) with electrodes, mentioned electrodes are connected to control block (9). One of electrodes of piezoelement (3) is used as an earth and another is divided in to two parts in ratio not less 1/10 and connected to control block (9), which is arranged with piesoelement (3) on a damping element (2). Control block(9) comprises connected in series a controller (6), a phase transducer (7), a power damper (8). A damping element (2) comprises electronic plate with electronic elements (10), which are condensers, transformers, microchips, resistances and likewise.A lesser electrode (4) of piezoelement (3) is connected to an input of control block (9), an electrode (5)is connected to output of control block (9).@

Description

Išradimas priskiriamas nestacionarių elektroninių prietaisų sričiai, konkrečiai elektroninių plokščių vibracijų slopinimui.The invention relates to the field of non-stationary electronic devices, in particular to the damping of electronic circuit boards.

Yra žinomas aktyvus daugiasluoksnės sijos vibracijų slopintuvas, kuriame slopinimas atliekamas šlyties pjezoelektrine pavara, kurią sudaro jutiklis, signalų filtras, valdiklis, galios stiprintuvas ir pjezoelementas. Vibracijų stebėjimui yra akcelerometras, signalų filtras ir signalų duomenų kaupimo sistema (žiūr. JAV žurnalą „Journal of intelligent Material Systems and structures“, Nr. 16,2005).An active multilayer beam vibration damper is known in which the damping is performed by a shear piezoelectric actuator consisting of a sensor, a signal filter, a controller, a power amplifier and a piezoelectric element. Vibration monitoring includes an accelerometer, signal filter, and signal data acquisition system (see U.S. Journal of Intelligent Material Systems and Structures, No. 16,2005).

Šio slopintuvo trūkumas yra tas, kad jis nėra efektingas ir jo konstrukcija yra sudėtinga, nes jame slopinimas atliekamas jutiklio ir pjezoelektrinės pavaros pagalba.The disadvantage of this damper is that it is inefficient and complicated in construction, because it is damped by a sensor and a piezo-electric actuator.

Yra žinomas pjezoelektrinis kompaktinių diskų skaitytuvo vibracijų slopintuvas, susidedantis iš korpuso, kuriame yra įtvirtintas lazerinis interferometrinis jutiklis, diskų skaitymo galvutė, ant kurios laikiklio pritvirtinta pjezoelektrine pavara, valdoma valdiklio. Diskų skaitymo galvutė slankioja virš kompaktinio disko, kurį suka variklis, įtvirtintas ant stovo, sumontuoto korpuse korpuse (žiūr. JAV patentas 6,310,746 BĮ, GI 1 B 5/012, 2001 m.).There is a known piezoelectric vibration dampener for a CD reader consisting of a housing having a laser interferometric sensor, a disk reader head having a piezoelectric actuator mounted on a controller controlled by a controller. The disk reader head slides over a CD driven by a motor mounted on a stand mounted in a housing (see U.S. Patent 6,310,746 to JI, GI 1 B 5/012, 2001).

Nurodytame išradime vibracijos matuojamos interferometriniu jutikliu, kurio konstrukcija yra sudėtinga, o tai visą vibracijų slopinimo sistemą padaro labai sudėtingą ir ne tokią efektingą.In the present invention, the vibrations are measured by an interferometric sensor of complex construction, which makes the whole vibration damping system very complex and less effective.

Išradimo tikslas - supaprastinti įrenginio konstrukciją ir padidinti vibracijų slopinimo sistemos efektyvumą.The object of the invention is to simplify the construction of the device and increase the efficiency of the vibration damping system.

Išradimo tikslas yra pasiekiamas tuo, kad pjezoelektrinėje vibracijų slopinimo sistemoje susidedančioje iš rėmo, kuriame įtvirtintas slopinamas elementas, ant kurio paviršiaus įtvirtintas pjezoelementas su elektrodais, prijungtais prie valdymo bloko, pjezoelemento vienas iš elektrodų yra naudojamas kaip įžeminimas, o kitas padalintas į dvi dalis ne mažesniu santykiu kaip 1/10 ir prijungtas prie valdymo bloko, sumontuoto kartu su pjezoelementu ant slopinamo elemento. Be to, valdymo blokas susideda iš nuosekliai sujungtų valdiklio, fazės keitiklio ir galios stiprintuvo, o slopinamą elementą sudaro elektroninė plokštė su joje išdėstytais elektronikos elementais , t.y. kondensatoriais, transformatoriais, mikroschemomis, varžomis ir kita. Taip pat, padalinto pjezoelemento mažesnysis elektrodas prijungtas prie valdymo bloko įėjimo, o didesnysis pjezoelemento elektrodas prijungtas prie valdymo bloko išėjimo.The object of the present invention is achieved by the fact that in a piezoelectric vibration damping system consisting of a frame containing a damping element, on which a piezoelectric element with electrodes connected to the control unit is mounted on the surface, one of the electrodes of the piezoelement is used as ground and in a ratio of 1/10 and connected to a control unit mounted together with a piezo element on the damping element. In addition, the control unit consists of a series of controllers, a phase converter and a power amplifier connected in series, and the damping element comprises an electronic board with electronic elements arranged therein, i.e. capacitors, transformers, chips, resistors and more. Also, the smaller piezoelectric electrode is connected to the control unit input and the larger piezoelectric electrode is connected to the control unit output.

Išradimo esmė paaiškinta figūrose.The essence of the invention is explained in the figures.

fig. yra pavaizduota pjezoelektrinės vibracijų slopinimo sistemos schema.FIG. is a diagram of a piezoelectric vibration damping system.

fig. yra pavaizduota signalų amplitudžių grafikai.FIG. is a graph of signal amplitudes.

Pjezoelektrinė vibracijų slopinimo sistema susideda iš rėmo 1, kuriame yra įtvirtinta slopinimo elementas (elektroninė plokštė) 2 ir pjezoelektrinis elementasThe piezoelectric vibration damping system consists of a frame 1 containing a damping element 2 (electronic board) and a piezoelectric element

3, kurio vienas iš elektrodų yra naudojamas kaip įžeminimas, o kitas yra padalintas į dvi dalis santykiu ne mažesniu kaip 1/10: viena dalis iš jų naudojama kaip jutiklis3, of which one of the electrodes is used as a grounding and the other is divided into two parts with a ratio of not less than 1/10: one part is used as a sensor

4, o kita - kaip pjezoelektrinė pavara 5. Jutiklis 4 yra prijungtas prie valdiklio 6, nuosekliai sujungto su fazės keitikliu 7 ir galios stiprintuvu 8, kurie apjungti į vieną valdymo bloką 9. Visi šie elementai, t.y. pjezoelektrinis elementas 3, valdiklis 6, fazės keitiklis 7 ir galios stiprintuvas 8 yra patalpinti tarp elektroninės plokštės 2 elementų 10.4 and the other as piezo-electric actuator 5. The sensor 4 is connected to a controller 6 connected in series to a phase converter 7 and a power amplifier 8, which are connected in one control unit 9. All these elements, i.e. the piezoelectric element 3, the controller 6, the phase converter 7 and the power amplifier 8 are disposed between the elements 10 of the electronic board 2.

Pjezoelektrinė vibracijų slopinimo sistema dirba taip.The piezoelectric vibration damping system works as follows.

Sužadintos elektroninės plokštės 2 virpesiai mechaniškai žadina pjezoelektrinį jutiklį 4. Šis žadinimas jutiklyje 4 generuoja elektrinį signalą (žiūr. 2 fig.- ištisinė linija), kuris perduodamas valdikliui 6. Valdiklis 6 šį signalą apdoroja, t.y. pašalina triukšmus bei apskaičiuoja vibracijų amplitudę ir dažnį. Apdorotas signalas perduodamas fazės keitikliui 7, kuris pakeičia signalo fazę į priešingą. Priešingos fazės signalas sustiprinamas galios stiprintuvu 8 (žiūr. 2 fig.- punktyrinė linija) ir perduodamas pjezoelektrinei pavarai 5, kuri elektroninę plokštę 2 žadina priešingos fazės vibracijomis. Priešpriešiais veikiantys virpesiai iki minimumo slopina elektroninės plokštės virpesius. Tik dėl elektrinio signalo apdorojimo ir sklidimo laiko sistemoje, gaunamas nedidelis slopinimo signalo vėlavimas tv, kuris pavaizduotas 2 fig. Idealiu atveju elektroninės plokštės 2 žadinimo signalo maksimali amplitudė Av lygi slopinimo signalo amplitudei As.The excitation of the excited electronic board 2 mechanically excites the piezoelectric sensor 4. This excitation in the sensor 4 generates an electrical signal (see Fig. 2 - solid line) which is transmitted to the controller 6. The controller 6 processes this signal, ie eliminates noise and calculates the amplitude and frequency. The processed signal is transmitted to a phase converter 7 which reverses the phase of the signal. The opposite phase signal is amplified by a power amplifier 8 (see dotted line in FIG. 2) and transmitted to a piezoelectric actuator 5 which excites the electronic board 2 by the opposite phase vibrations. Opposite oscillations minimize the vibration of the electronic board. Only due to the processing and propagation time of the electrical signal in the system, a small delay signal t v is obtained, which is illustrated in FIG. Ideally, the maximum amplitude A v of the excitation signal of the electronic board 2 is equal to the amplitude A s of the attenuation signal.

Palyginus su prototipu nauja konstrukcinių elementų visumą, dėka to, kad padalinus pjezoelementą į dvi dalis, jutiklio ir pavaros funkcijas atlieka vienas ir tas pats elementas, konstrukcija tampa paprastesnė ir efektyvesnė.Compared to the prototype, a new set of structural elements, thanks to the fact that dividing the piezo element into two parts, the sensor and actuator functions are the same, simplifies the design and makes it more efficient.

Claims (5)

IŠRADIMO APIBRĖŽTISDEFINITION OF INVENTION 1. Pjezoelektrinė vibracijų slopinimo sistema susidedanti iš rėmo, kuriame įtvirtintas slopinamas elementas, ant kurio paviršiaus įtvirtintas pjezoelementas su elektrodais, prijungtais prie valdymo bloko, besiskirianti tuo, kad pjezoelemento vienas iš elektrodų yra naudojamas kaip įžeminimas, o kitas padalintas į dvi dalis, kurios prijungtos prie valdymo bloko, sumontuoto kartu su pjezoelementu ant slopinamo elemento.1. A piezoelectric vibration damping system consisting of a frame comprising a damped element on which a piezoelectric element with electrodes connected to a control unit is mounted on a surface, characterized in that one of the electrodes of the piezoelectric element is used as a ground and the other is divided into two parts which are connected. to a control unit mounted together with a piezo element on the damping element. 2. Pjezoelektrinė vibracijų slopinimo sistema pagal 1 punktą besiskiriant i tuo, kad valdymo blokas susideda iš nuosekliai sujungtų valdiklio, fazės keitiklio ir galios stiprintuvo.2. Piezoelectric vibration damping system according to claim 1, characterized in that the control unit consists of a continuously connected controller, a phase converter and a power amplifier. 3. Pjezoelektrinė vibracijų slopinimo sistema pagal 1 punktą besiskiriant i tuo, kad slopinamą elementą sudaro elektroninė plokštė su joje išdėstytais elektronikos elementais , t.y. kondensatoriais, transformatoriais, mikroschemomis, varžomis ir kita.3. A piezoelectric vibration damping system according to claim 1, characterized in that the damping element comprises an electronic board with electronic elements arranged therein, i.e. capacitors, transformers, chips, resistors and more. 4. Pjezoelektrinė vibracijų slopinimo sistema pagal 1 punktą besiskiriant i tuo, kad pjezoelemento elektrodų padalinimo santykis yra ne mažesnis kaip 1/10.4. Piezoelectric vibration damping system according to claim 1, characterized in that the piezoelectric electrode split ratio is at least 1/10. 5. Pjezoelektrinė vibracijų slopinimo sistema pagal 1 punktą besiskiriant i tuo, kad pjezoelemento mažesnysis elektrodas prijungtas prie valdymo bloko įėjimo, o didesnysis pjezoelemento elektrodas prijungtas prie valdymo bloko išėjimo.5. The piezoelectric vibration damping system of claim 1, wherein the smaller electrode of the piezoelectric element is connected to the input of the control unit and the larger electrode of the piezoelectric element is connected to the output of the control unit.
LT2009051A 2009-07-23 2009-07-23 Piezoelectric damping system of oscillations LT5726B (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6310746B1 (en) 1999-06-23 2001-10-30 Read-Rite Corporation Piezoelectric vibration damping for disk drives

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6310746B1 (en) 1999-06-23 2001-10-30 Read-Rite Corporation Piezoelectric vibration damping for disk drives

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