DuraAct™— Piezoelectric Patch Transducers for …

1 duraact Piezoelectric Patch Transducers for industry and ResearchPiezo Nano PositioningPiezo Nano Brochure: duraact Piezoelectric Patch Transducers ; piezocomposite Transducers ; adaptronics, commercial applications; aerospace, automotive, machinery;; equipment, building and structures, Smart Materials; P-876; P876 PI Ceramic (PIC) is the piezo-ceramic division of PhysikInstrumente (PI), the world-leading manufacturer of ultra-high-precision piezo nanoposi-tioning systems. Based onknowledge and expertisegained in more than 40 yearsof continuous research andmanufacturing of piezoelectricmaterials and components, PICeramic is a world-class sup-plier of high-performancepiezoelectric actuator andtransducer components andsubassemblies.

2 State-of-the-Art Piezo Com-ponents, Ultrasonic Trans-ducers, Piezo Actuators andPiezo-System Solutions Design & Manufacture ofHigh-ReliabilityComponents for the KeyMarkets of Our Time Custom and Standard Solutions Highly FlexibleProcessing Ensures RapidDelivery Custom Designs All KeyTechnologies and Equip-ment In-House ISO 9001-2000 QualityCertified since 1997 Ultra-High-Precision Tech-nology Years Ahead of Its TimePI has a strategy of verticalintegration with all key tech-nologies developed and main-tained in the company. Directcontrol over every step fromconception to shipment per-mits optimizing quality andcost. As a customer, you, too, can profit from our longexperience in controlling andmeasuring motion at thenanometer level.

3 PI can reactquickly to development andproduction needs of OEM cus-tomers even for highly com-plex custom products and Technologies Under One Roof:a Plus for Our CustomersINVENT GmbH is a 1996 spin-off from the DLR (GermanAerospace Center) Institute ofStructural Mechanics inBraunschweig. Now an estab-lished partner for the aero-space industry , INVENT offersqualified processes for plan-ning, design, engineering andmanufacturing the funda-mentals of successful productdevelopment. INVENT GmbH has earnedrenown as engineering special-ist for composite fiber tech-nologies. The company devel-ops structural components,applying their expertise infields ranging from structuralanalysis, construction methodsto series production.

4 Anothermajor area of activity isresearch and , the focus is on materialand process engineering,including finishing and coatingof composite fiber structures. The quality management sys-tem at INVENT has been DINEN 9100 certified since for IndustryState-of-the-art PI Ceramicfacility in Lederhose Germanyhosts an extensive manufacturing operation, R&D laboratories as well asadministration officesPI headquartersCooperationDuraAct Patch transducersare based on a patenteddevelopment by the GermanAerospace Center (DLR). PICeramic (PIC) produces thepiezoceramic elements andhandles all sales under anexclusive agreement, whileINVENT GmbH puts togetherthe Nano PositioningPiezo Nano PositioningThe development of self-cor-recting, adaptive systems isreceiving more and moreattention in modern industrialresearch.

5 Structures using smart materials which inte-grate sensor and actuator func-tions are taking on growingimportance in this field. Thesesystems are designed to detectand react to changes in theiroperating environment, likeimpact, pressure or bendingforces. With a long history as adaptivematerials, piezo actuators havebeen especially popular for themonitoring and active damp-ing of high-frequency vibra-tion. The novel duraact patchtransducers now offer a com-pact solution in this area. Applied directly to a substrate,or used as part of the structureitself, duraact Patch tranduc-ers can detect and producevibrations or contour deforma-tions at the source, inside thestructure. The magnitude ofusable deflection dependsstrongly on the substrate prop-erties, and extends into themillimeter range.

6 Adaptronics IndustrialApplications of TomorrowPiezoelectric components likethe duraact Patch transducertransform electrical to mechan-ical energy and vice applications are inhigh-precision bender actua-tors, high-dynamics sensors oras power sources. duraact Patch transducersare extremely compact unitsbased on a thin piezoceramicfoil between two conductivefilms, all embedded in a ductilecomposite-polymer this way, the brittle piezo-ceramic is mechanically pre-stressed and electrically insu-lated, which makes the trans-ducers so robust that they canbe applied on curved surfaceswith a bending radius as low as20 mm. The Patch transducersare glued to the surface and canbe used for various purposes.

7 Even in high-dynamics applica-tions, the rugged designensures reliability, high resist-ance to damage and a lifetimewell over 109cycles. Wear andfailure rates are low, as thesolid-state actuators contain nomoving All-Rounder duraact Patch TranducersDuraAct Patch transducerscan extract electric power frommechanical vibrations of up toseveral kilohertz, thus acting asenergy harvesting devices. Thepower, in the milliwatt range,can supply miniature electron-ics like LEDs, sensors or miniRF transmitters for remote datatransfer. Miniature Electric Generator forAutonomous SystemsDuraAct Patch Transducers tolerate bending radii as low as 20 mm (3/4in.)PI Brochure: duraact Piezoelectric Patch Transducers ; piezocomposite Transducers ; adaptronics, commercial applications; aerospace, automotive, machinery;; equipment, building and structures, Smart Materials; P-876; P876 4PI Brochure: duraact Piezoelectric Patch Transducers ; piezocomposite Transducers ; adaptronics, commercial applications; aerospace, automotive, machinery;; equipment, building and structures, Smart Materials; P-876; P876 duraact technology allowshigh flexibility in actuatordesign.

8 This means thatDuraAct is also ideally suitedfor research and addition to the range of stan-dard designs, highly individu-alized structural shapes can berealized to meet differentrequirements of geometry,flexibility, stiffness or operat-ing temperature. Standard duraact patchtransducers consist of onepiezoceramic layer only. Forspecial applications, multilayerdevices can be made an actuator, multiple layersresult in higher force genera-tion with the same operating voltage. If the layers are wiredseparately, both sensor andactuator functionality can beused simultaneously. The Piezoelectric transducerscan be designed to fit the appli-cation exactly, including eventransducers with arrays ofmultiple ceramic custom products can beproduced very efficiently, evenin low quantities.

9 Depending on the application,different demands are made onthe electronics. To operate ahigh-precision, high-dynamicspositioner, a low-noise, broad-band amplifier is vibration dampingrequires fast servo-control withbandwidth sufficient for close-coupling the generated force tothe structural mass to bedamped. PI offers special, high-resolu-tion amplifier modules forDuraAct Patch Transducers ,and can always create customversions to meet specialrequirements. Tailored Control ElectronicsSelection of custom modulesDuraAct Patch Transducers Features and AdvantagesCustom Versions forAny ApplicationHigh damage immunityChoice of materials and geometriesWell-defined mechanical and electrical propertiesShort lead-time availabilityCompactLong lifetimeHigh bandwidthCustomized solutionsCan be applied to curved surfacesConstant & proven qualityEasy to useOperation as actuator, sensor or power sourceMultilayer module, for actuator-sensor combinationHighly flexible ceramic elementsCost-effectivePI Brochure: duraact Piezoelectric Patch Transducers ; piezocomposite Transducers ; adaptronics, commercial applications; aerospace, automotive, machinery;; equipment, building and structures, Smart Materials; P-876.

10 P876 5 Piezo Nano PositioningPiezo Nano PositioningFig. 1a: Classical application of the direct piezo effect. Minute deformations of the substratecause displacements in the duraact Patch transducer and produce an electric current pro-portional to the motion. duraact Transducers can detect deformations like those causedby bending strain or pressure very precisely, even at high ExamplesSensor ModeFUUFUUFig. 1b: The same operating mode can be used with an array of several modules. Vibration damping applica-tions: good results can beachieved by combining apiezoelectric sensor with aservo-controller and havingthe sensor signal control an(external) damping mecha-nism. Actuator ModeUFFig. 2: In actuator mode, duraact Patch Transducers use the inversepiezo effect: they contract whenvoltage is applied.