Bibliographies thématiques / Actuating

Littérature scientifique sur le sujet « Actuating »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Actuating"

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Liu, Y.-T., et C.-K. Wang. « A study of the characteristics of a one-degree-of-freedom positioning device using spring-mounted piezoelectric actuators ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 223, no 9 (22 mai 2009) : 2017–27. http://dx.doi.org/10.1243/09544062jmes1422.

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This article presents the actuating performance of a one-degree-of-freedom (DOF) positioning device using spring-mounted piezoelectric (PZT) actuators. To employ a spring with a preset compression, the operational range of a PZT actuator could be simply enlarged, and a sliding table actuated by PZT impact force might feature long stroke and high-precision positioning ability. An experimental set-up consisting of two spring-mounted PZT actuators was configured to examine the actuating characteristics. According to experimental results, a sliding table with a heavy mass of 172 g could be actuated to move with a step motion ranging from 15 nm to 81 μm by only one single actuation of the PZT actuator, and with a maximum travelling speed of 3.47 mm/s by continuous actuation. In addition to experimental examinations, a dynamic model was established and verified as effective in describing the actuating behaviours through numerical examinations.
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Zhang, Jiarui, Jianwei Tu, Zhao Li, Kui Gao et Hua Xie. « Modeling on Actuation Behavior of Macro-Fiber Composite Laminated Structures Based on Sinusoidal Shear Deformation Theory ». Applied Sciences 9, no 14 (19 juillet 2019) : 2893. http://dx.doi.org/10.3390/app9142893.

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A new piezoelectric composite, macro fiber composite (MFC) is recombined with piezoceramic fibers, an epoxy resin basal body, and an interdigitated electrode. It has been widely applied in vibration reduction and deformation control of thin-walled structures, due to its great deformability and flexibility. Research on its actuation performance is mostly concentrated on the MFC actuating force calculation based on classical plate theory (CPT), and the overall modeling of MFC and its structure. However, they have some deficiencies in the tedious calculating process and neglect of shear deformation, respectively. To obtain a precise MFC actuating force, the sinusoidal shear deformation theory (SSDT) is adopted to deduce the MFC actuating force formula, and global–local displacement distribution functions are introduced to help the MFC laminated plate structure satisfy the deformation compatibility and stress balance. For instance, in the end displacement calculation of the MFC laminated beam structure. The experimental result of the MFC laminated beam is compared with those of the MFC actuating force based on SSDT and on CPT, which indicates that the MFC actuating force formula based on SSDT can reach higher computational accuracy.
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Gillman, Andrew, Gregory Wilson, Kazuko Fuchi, Darren Hartl, Alexander Pankonien et Philip Buskohl. « Design of Soft Origami Mechanisms with Targeted Symmetries ». Actuators 8, no 1 (24 décembre 2018) : 3. http://dx.doi.org/10.3390/act8010003.

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The integration of soft actuating materials within origami-based mechanisms is a novel method to amplify the actuated motion and tune the compliance of systems for low stiffness applications. Origami structures provide natural flexibility given the extreme geometric difference between thickness and length, and the energetically preferred bending deformation mode can naturally be used as a form of actuation. However, origami fold patterns that are designed for specific actuation motions and mechanical loading scenarios are needed to expand the library of fold-based actuation strategies. In this study, a recently developed optimization framework for maximizing the performance of compliant origami mechanisms is utilized to discover optimal actuating fold patterns. Variant patterns are discovered through exploring different symmetries in the input and output conditions of the optimization problem. Patterns designed for twist (rotational symmetry) yield significantly better performance, in terms of both geometric advantage and energy requirements, than patterns exhibiting vertical reflection symmetries. The mechanical energy requirements for each design are analyzed and compared for both the small and large applied displacement regimes. Utilizing the patterns discovered through optimization, the multistability of the actuating arms is demonstrated empirically with a paper prototype, where the stable configurations are accessed through local vertex pop-through instabilities. Lastly, the coupled mechanics of fold networks in these actuators yield useful macroscopic motions and can achieve stable shape change through accessing the local vertex instabilities. This survey of origami mechanisms, energy comparison, and multistability characterization provides a new set of designs for future integration with soft actuating materials.
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Shi, Qiuwei, Chengyi Hou, Hongzhi Wang, Qinghong Zhang et Yaogang Li. « An electrically controllable all-solid-state Au@graphene oxide actuator ». Chemical Communications 52, no 34 (2016) : 5816–19. http://dx.doi.org/10.1039/c6cc01590e.

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Ploszajski, Anna R., Richard Jackson, Mark Ransley et Mark Miodownik. « 4D Printing of Magnetically Functionalized Chainmail for Exoskeletal Biomedical Applications ». MRS Advances 4, no 23 (2019) : 1361–66. http://dx.doi.org/10.1557/adv.2019.154.

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AbstractChainmail fabrics manufactured by selective laser sintering 3D printing have been magnetically functionalized to create a lightweight, 4D printed, actuating fabric. The post-processing method involves submerging the porous prints in commercial ferrofluid (oil-based magnetic liquid), followed by drying under heat. The actuation of the chainmail has been simulated using a rigid multi-body physics engine, and qualitatively matches experiment. Such magnetically actuating fabrics have potential to make thin, lightweight and comfortable wearable assistive devices.
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Zhou, Qi. « Magnetic Actuating Alcolock Device with Double Plunger Solenoids ». Applied Mechanics and Materials 610 (août 2014) : 101–5. http://dx.doi.org/10.4028/www.scientific.net/amm.610.101.

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In order to construct a simply structured alcolock device for autocar steering safety, the plunger solenoid with the conical face pole form is utilized to fabricate a electromagnetic actuating unit with double plunger solenoids. The unit can generate a electromagnetic actuation with long travel to complete the coverage of auto start-up lock hole and hence to stop the vehicle launch; the magnetic actuation is controlled by using a alcohol sensing system, and the shutting function for starting-up lock hole is generated by a baffle installed at the top of plunger solenoids as the actuating control is started up on the basis of an alcohol sensing signal. The plunger solenoid with conical face pole form possesses the output characteristic of long stroke and steady stroke force.
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Leopold, S., T. Geiling, C. Fliegner, D. Pätz, S. Sinzinger, J. Müller et M. Hoffmann. « Multifunctional LTCC Substrates for Thermal Actuation of Tunable Micro-Lenses Made of Aluminum Nitride Membranes ». Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, CICMT (1 septembre 2013) : 000124–30. http://dx.doi.org/10.4071/cicmt-2013-wp14.

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Thin membranes are widely used for tunable micro-lenses, where the membrane, usually made from polymers, defines the surface of a subjacent liquid. If the liquid is pressurized, the membrane deflects and forms a lens. In many cases, a macroscopic pump is used to generate the pressure. Here, we use a multifunctional LTCC substrate, which consists of two cavities. A micro-fluidic network allows their independent filling. For the actuation, the actuating cavity is filled with air and the optical cavity is filled with immersion oil. If the actuating cavity is heated by screen-printed resistors, the fluid expands and a pressure is transmitted to the optical cavity via a micro-fluidic channel. The optical cavity is covered with a glass chip and a membrane chip, respectively. We use 500 nm thick membranes of aluminum nitride (AlN), which have a 3 mm diameter and are fabricated using technologies of silicon based micro-electro-mechanical systems. With 6 W electrical heating power a temperature increase of 100 K within the actuating cavity is achieved. The generated pressure causes a membrane deflection in the optical cavity of about 30 μm. The thermal actuation is investigated using thermal imaging. By heating the actuating cavity, the optical cavity also heats up, but no temperature gradients along the silicon chip is found. Optical experiments show the imaging capability of the lens and confirm a tunable refractive power of 0..17 dpt.
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Zhang, Shuwen, Shubao Shao, Xuxu Yang, Peijian Chen, Hui Ji, Kaiyuan Liu, Tonghui Wu, Shengping Shen et Minglong Xu. « An enhanced flexoelectric dielectric elastomer actuator with stretchable electret ». Smart Materials and Structures 30, no 12 (25 octobre 2021) : 125004. http://dx.doi.org/10.1088/1361-665x/ac2de1.

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Abstract Actuation has been applied with dielectric elastomers (DE) in soft robotics and bio-mimic devices due to their ultra-large deformation range, easy patterning, light weight, and they are highly expected for high electro-mechanical efficiency and low stimulating power. Flexoelectricity describes the strain gradient-induced electric polarization, which is strongly related to geometry and deformation ranges. The electro-mechanical coupling effect with flexoelectricity in elastomeric materials are then highly expected. In this work, elastic modulus gradient of a DE actuator is designed for bending motion by flexoelectricity, and electric charge is inserted and immobilized inside the material to further enhance the electro-mechanical capability. Elastic modulus gradient is designed, and electric charges are immobilized to enlarge the electro-mechanical coupling efficiencies of this flexoelectric actuator. The bending angle of the actuator is inversely proportional to the cube of general thickness of actuator, and the immobilized electric charge extensively enlarged the actuation capability. With elastic modulus gradient and electret, the actuating bending angle is enlarged with low stimulating voltage. This work provides an enhanced flexoelectric actuating method with material and mechanical design, and highlights low-voltage actuating approach with piezoelectric-like effect of stretchable electrets.
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Lu, Gang, Changgeng Shuai, Yinsong Liu, Xue Yang et Xiaoyang Hu. « The Effect of a Flexible Electrode on the Electro Deformability of an Actuating Unit of a MDI-Polyurethane Composite Fiber Membrane Filled with BaTiO3 ». Membranes 12, no 9 (12 septembre 2022) : 878. http://dx.doi.org/10.3390/membranes12090878.

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The electro deformability of an actuating unit of a polyurethane dielectric elastomer (PUDE) is affected by many factors. The agglomeration of dielectric fillers faced by the traditional dielectric modification methods will lead to the instability of the actuation performance of dielectric composites. In addition, the electro deformability (ability of deformation after voltage loading) is great affected by the selection of flexible electrodes and packaging technology. Based on the research findings, Diphenylmethane-4,4′-diisocyanat (MDI)-polyurethane dielectric composite fiber membrane filled with barium titanate (BaTiO3) is prepared using coaxial spinning, and this study then analyzes the effects of the types of flexible electrodes and coating methods on the electro deformability of the actuating unit of the dielectric composite fiber membrane. It is found that the electro deformability of the actuating unit coated with the single-walled carbon nanotube (SWNT) flexible electrode is better than that of the perfluoropolyether conductive grease (PCG) or the traditional conductive carbon grease (CCG) electrode in various degrees. When the loading voltage is 20 kV, the electro deformability of the actuating unit coated with SWNT flexible electrode exceeds the latter two electrodes by 13.8%; when the SWNT flexible electrode is encapsulated by physical surface implantation (PSI), the electric deformation of the actuating unit is higher than that of the solvent suspension dispersion (SSD).
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Ma, Mingming. « Actuating smart ». Nature Nanotechnology 14, no 11 (novembre 2019) : 1003–4. http://dx.doi.org/10.1038/s41565-019-0569-9.

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Thèses sur le sujet "Actuating"

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Bernier, Jobe Paul. « Entropy and Architecture entropic phenomena actuating dynamic space / ». Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/bernier/BernierJ0508.pdf.

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Kwok, Christopher (Christopher L. ). « Exploring and evaluating methods of actuating an active lens ». Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105694.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 24).
Active lenses today have a variety of uses from photographic capabilities in small mobile devices to applications in engineering. They provide faster response times and higher portability and efficiency when compared to their traditional lens assemblies. For this project, I have evaluated two different methods of active lens actuation: using an electromagnetic actuator and using an electroactive polymer. From testing each method's abilities, it was found that the electromagnetic actuator, though robust in design poses issues over long-time use. The electromagnetic actuator was able to generate a focal power range of 11.9 to 19.2 diopters (52 to 84mm focal length range), but a high power consumption led to problems with heating the internal components of the active lens assembly. In the EAP method, a lower power consumption proved to be a viable option for actuation, and through testing and calculation, it was determined to be useful in application. However, a proposed efficient design must be further explored.
by Christopher Kwok.
S.B.
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Johnson, Roger Warren. « Design and development of a three link in-parallel actuating prototype manipulator ». Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/15961.

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McMahon, Michael. « A novel accelerated life cycle methodology for actuating MEMS membranes via mechanical contact : innovation report ». Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/45946/.

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In the emerging technology of Micro Electronic Mechanical Systems (MEMS) there are challenges such as adoption, economies of scale, packaging and reliability incurred by many nascent technologies. The advantages of MEMS devices such as small micron scale, low power consumption and lab on a chip style data processing clearly outline the practical potential for the technology. Packaging and reliability driven by cost, however; are the factors that hinder progress of the technology and further entry into market. In the case of MEMS however, existing methods must be reassessed as fundamentally the concepts and scales have changed. MEMS is a market that despite challenges of the economy is still committed to heavy global investment from figures of $7bn in 2009 with 13% growth in 2010 with a projected growth rate of 14-15% over the years 2011 – 2015. (Dempsey, 2010) Reliability in essence holds the key to driving down the unit cost of production and technology adoption; if units are more reliable there is a potential for increased sales, further refinement and development as the case with mobile phones and the automotive industry. Thus the aim of this project is to create and apply a methodology of assessing the reliability of MEMS components. This research project focused on using a scientific based research methodology, conventional metrology and engineering techniques to produce a method of predicting lifetime information for a particular device component. A broad selection of experimental techniques were assessed and deemed unsuitable, primarily due to inflicting unnecessary damage of the fragile structures, range restrictions on forces that could be loaded and availability of equipment. Following laboratory work and iterative refinement, a successful methodology was created and refined; allowing to mechanically actuate a MEMS membrane to high cycle fatigue failure without damage due to contact force. This used with the bulge test can provide information on new MEMS composites and how they behave as realistically as possible in their future application space. Working closely with QinetiQ and an international collaboration funded by the European Defence Agency (EDA), on a broader MEMS reliability project called POLYNOE; it is now possible to achieve lifetime information for MEMS membranes and use the created experimental technique to cater for any micron sized membrane for any duration at a cycle rate not known or explored in this domain before. Characterisation data, of the membrane and thin film with substrate structure was obtained and using traditional Finite Element Analysis (FEA) and Accelerated Life Cycle Prediction techniques the stresses incurred and Mean Times to Failures (MTTF) for the membranes was calculated as 32million cycles at a comparative operating force of 0.14mN. Suggestions have been made at the possibilities of implementing the methodology and techniques at QinetiQ; to complement their traditional low cycle method of stressing the membranes and therefore iterate the useful information back into the development cycle to refine designs increase reliability and therefore reduce unit cost.
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Marett, Josh Michael. « The Isolation of Cellulose Nanocrystals from Pistachio Shells and Their Use in Water Actuating Smart Composites ». Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78902.

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Composites are a category of materials where two or more materials are used together to enhance each of their strengths. Such materials are often used in airplanes, spacecraft, sporting equipment, and many high-end products. Cellulose nanocrystals (CNCs) have been research with the goal of improving the environmental sustainability and performance of composite materials. This newly utilized material is found in plants and some animals to provide them with their strength. Researches have already shown that CNCs can improve the performance of many materials while reducing their lifetime environmental impact. In order to increase the market for CNCs, we are looking at costreducing methods of producing them as well as finding exciting new uses for them once they are made. Right now, most CNCs are isolated from wood or cotton, which already have existing markets. This thesis presents a method of using pistachio shells, which are a waste product in many parts of the world including the United States. By finding new sources of CNCs, we hope to add to the body of knowledge and reduce the price of CNC production. This thesis also lays the groundwork for a material that changes shape when exposed to water. By integrating CNCs into only part of a polymer, when water is added, the part with the CNCs will increase in size, causing it to push on the polymer. Our hope is to create a new use for CNC composites to help to increase the market for them. We discuss potential methods and proofs of concept on how to create a 3D-printed part using CNCs and polyurethane.
Master of Science
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Meisel, Nicholas Alexander. « Design for Additive Manufacturing Considerations for Self-Actuating Compliant Mechanisms Created via Multi-Material PolyJet 3D Printing ». Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/54033.

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The work herein is, in part, motivated by the idea of creating optimized, actuating structures using additive manufacturing processes (AM). By developing a consistent, repeatable method for designing and manufacturing multi-material compliant mechanisms, significant performance improvements can be seen in application, such as increased mechanism deflection. There are three distinct categories of research that contribute to this overall motivating idea: 1) investigation of an appropriate multi-material topology optimization process for multi-material jetting, 2) understanding the role that manufacturing constraints play in the fabrication of complex, optimized structures, and 3) investigation of an appropriate process for embedding actuating elements within material jetted parts. PolyJet material jetting is the focus of this dissertation research as it is one of the only AM processes capable of utilizing multiple material phases (e.g., stiff and flexible) within a single build, making it uniquely qualified for manufacturing complex, multi-material compliant mechanisms. However, there are two limitations with the PolyJet process within this context: 1) there is currently a dearth of understanding regarding both single and multi-material manufacturing constraints in the PolyJet process and 2) there is no robust embedding methodology for the in-situ embedding of foreign actuating elements within the PolyJet process. These two gaps (and how they relate to the field of compliant mechanism design) will be discussed in detail in this dissertation. Specific manufacturing constraints investigated include 1) "design for embedding" considerations, 2) removal of support material from printed parts, 3) self-supporting angle of surfaces, 4) post-process survivability of fine features, 5) minimum manufacturable feature size, and 6) material properties of digital materials with relation to feature size. The key manufacturing process and geometric design factors that influence each of these constraints are experimentally determined, as well as the quantitative limitations that each constraint imposes on design.
Ph. D.
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Gorges, Stephan [Verfasser], René [Akademischer Betreuer] Theska, Christoph [Gutachter] Schäffel et Bernd Hans [Gutachter] Schmidt. « A lifting and actuating unit for a planar nanoprecision drive system / Stephan Gorges ; Gutachter : Christoph Schäffel, Bernd Hans Schmidt ; Betreuer : René Theska ». Ilmenau : TU Ilmenau, 2020. http://d-nb.info/1224416589/34.

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Úšela, Tomáš. « Revolverová hlava pro dlouhotočný automat s elektricky ovládaným indexováním ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227980.

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Imposition of my diploma thesis is replace current fluid motor that the derive benefit from to indexing turret head behind electrically driven motor in the sliding headstock machine with indication KMX 326 C. Suggested system must be the most toughest and have to correspond with all the dated up parameters for cutting. Integral part of structural design is also becomingly select accurate blocking a turret head. Fluid motor substitutes behind electrical drive from next reasons: - high transmission loss on energy - sensitivity to cleanness liquid - characteristics mechanism depend upon features liquid ( thermal expansivity, fadeaway)
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Guiducci, Lorenzo. « Passive biomimetic actuators : the role of material architecture ». Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/7044/.

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Passive plant actuators have fascinated many researchers in the field of botany and structural biology since at least one century. Up to date, the most investigated tissue types in plant and artificial passive actuators are fibre-reinforced composites (and multilayered assemblies thereof) where stiff, almost inextensible cellulose microfibrils direct the otherwise isotropic swelling of a matrix. In addition, Nature provides examples of actuating systems based on lignified, low-swelling, cellular solids enclosing a high-swelling cellulosic phase. This is the case of the Delosperma nakurense seed capsule, in which a specialized tissue promotes the reversible opening of the capsule upon wetting. This tissue has a diamond-shaped honeycomb microstructure characterized by high geometrical anisotropy: when the cellulosic phase swells inside this constraining structure, the tissue deforms up to four times in one principal direction while maintaining its original dimension in the other. Inspired by the example of the Delosoperma nakurense, in this thesis we analyze the role of architecture of 2D cellular solids as models for natural hygromorphs. To start off, we consider a simple fluid pressure acting in the cells and try to assess the influence of several architectural parameters onto their mechanical actuation. Since internal pressurization is a configurational type of load (that is the load direction is not fixed but it “follows” the structure as it deforms) it will result in the cellular structure acquiring a “spontaneous” shape. This shape is independent of the load but just depends on the architectural characteristics of the cells making up the structure itself. Whereas regular convex tiled cellular solids (such as hexagonal, triangular or square lattices) deform isotropically upon pressurization, we show through finite element simulations that by introducing anisotropic and non-convex, reentrant tiling large expansions can be achieved in each individual cell. The influence of geometrical anisotropy onto the expansion behaviour of a diamond shaped honeycomb is assessed by FEM calculations and a Born lattice approximation. We found that anisotropic expansions (eigenstrains) comparable to those observed in the keels tissue of the Delosoperma nakurense are possible. In particular these depend on the relative contributions of bending and stretching of the beams building up the honeycomb. Moreover, by varying the walls’ Young modulus E and internal pressure p we found that both the eigenstrains and 2D elastic moduli scale with the ratio p/E. Therefore the potential of these pressurized structures as soft actuators is outlined. This approach was extended by considering several 2D cellular solids based on two types of non-convex cells. Each honeycomb is build as a lattice made of only one non-convex cell. Compared to usual honeycombs, these lattices have kinked walls between neighbouring cells which offers a hidden length scale allowing large directed deformations. By comparing the area expansion in all lattices, we were able to show that less convex cells are prone to achieve larger area expansions, but the direction in which the material expands is variable and depends on the local cell’s connectivity. This has repercussions both at the macroscopic (lattice level) and microscopic (cells level) scales. At the macroscopic scale, these non-convex lattices can experience large anisotropic (similarly to the diamond shaped honeycomb) or perfectly isotropic principal expansions, large shearing deformations or a mixed behaviour. Moreover, lattices that at the macroscopic scale expand similarly can show quite different microscopic deformation patterns that include zig-zag motions and radical changes of the initial cell shape. Depending on the lattice architecture, the microscopic deformations of the individual cells can be equal or not, so that they can build up or mutually compensate and hence give rise to the aforementioned variety of macroscopic behaviours. Interestingly, simple geometrical arguments involving the undeformed cell shape and its local connectivity enable to predict the results of the FE simulations. Motivated by the results of the simulations, we also created experimental 3D printed models of such actuating structures. When swollen, the models undergo substantial deformation with deformation patterns qualitatively following those predicted by the simulations. This work highlights how the internal architecture of a swellable cellular solid can lead to complex shape changes which may be useful in the fields of soft robotics or morphing structures.
Passive pflanzliche Aktuatoren sind bewegliche Strukturen, die eine komplexe Bewegung ohne jegliche metabolische Energiequelle erzeugen können. Diese Fähigkeit entstammt dabei der Materialverteilung mit unterschiedlicher Quellbarkeit innerhalb der Gewebsstruktur.Die bis heute am besten untersuchten Gewebearten pflanzlicher und künstlicher Passivaktuatoren sind Faserverbundwerkstoffe, in denen steife, fast undehnbare Zellulosemikrofibrillen die ansonsten isotrope Schwellung einer Matrix leiten. Darüber hinaus gibt es in der Natur Beispiele für Aktuationssysteme, wie z.B. die Delosoperma nakurense Samenkapsel, in der das Aktuatorgewebe eine Wabenstruktur aufweist, deren Zellen mit einem hochquellenden Material gefüllt sind. Dabei hat die Wabenstruktur des Gewebes eine hohe geometrische Anisotropie, so dass sich das Gewebe bei Wasseraufnahme bis zur vierfachen Länge entlang einer Hauptrichtung ausdehnt und somit die reversible Öffnung der Kapsel angetrieben wird. Inspiriert durch das Vorbild der Delosoperma nakurense, wird in der vorliegenden Arbeit die Rolle der Architektur von 2D-Zellulärmaterialien als Modell für natürliche passive Aktuatoren analysiert. Zunächst wird anhand eines einfachen Flüssigkeitsdrucks in den Zellen der Einfluss verschiedener architektonischer Parameter auf deren mechanische Betätigung untersucht. Wohingegen regelmäßige konvexe Wabenstrukturen (wie z. B. sechseckige, dreieckige oder quadratische Gitter) sich unter Druck isotropisch verformen, wird durch Finite-Elemente-Simulationen gezeigt, dass es bei anisotropen und nicht-konvexen Zellen zu großen Ausdehnungen jeder einzelnen Zelle kommt. Auch wenn nur eine einzelne Zellgeometrie betrachtet wird, können hierbei viele verschiedene Gitter entstehen. Die Ausdehnungsrichtung des Gitters ist variabel und hängt von der lokalen Konnektivität der Zellen ab. Dies hat Auswirkungen sowohl auf makroskopischer (Gitter-) als auch auf mikroskopischer (Zell-) Ebene. Auf makroskopischer Ebene erfahren diese nicht-konvexen Gitter entweder große anisotrope (ähnlich der Delosperma nakurense Samenkapsel) oder vollkommen isotrope Eigendehnungen, große Scherverformungen oder jeweilige Mischformen. Überdies können Gitter mit ähnlichem makroskopischem Verhalten gänzlich unterschiedliche mikroskopische Verformungsmuster zeigen, wie z.B. Zick-Zack-Bewegungen oder radikale Änderungen der ursprünglichen Zellform. Dies verursacht auch eine entsprechende Änderung der elastischen Eigenschaften. In Abhängigkeit der Gitterarchitektur kann es zu gleichen oder unterschiedlichen mikroskopischen Zelldeformationen kommen, die sich in Summe entweder verstärken oder ausgleichen, und somit die Vielzahl an makroskopischen Verhalten erklären. Interessanterweise lassen sich mit Hilfe einfacher geometrischer Argumente aus der nichtdeformierten Zellform und Zellkonnektivität die Ergebnisse der FE-Simulationen vorhersagen. Die Ergebnisse der Finite-Elemente-Simulationen wurden durch Laborversuche bestätigt, in denen (mit 3D-Drucktechnik gefertigte) Modellgitter ähnliches Ausdehnungsverhalten beim Quellen zeigen. Diese Arbeit zeigt auf, wie die Innenarchitektur eines quellfähigen zellulären Feststoffs zu komplexen Formänderungen führen kann, die in den Bereichen der Soft-Robotik oder bei Morphing-Strukturen angewandt werden können.
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Wenzel, Ute Verfasser], Ivo W. [Akademischer Betreuer] [Rangelow, D. Frank [Akademischer Betreuer] Ogletree et Teodor P. [Akademischer Betreuer] Gotszalk. « Fabrication and characterization of self-sensing and self-actuating piezoresistive microscale silicon cantilevers for an integrated scanning probe microscopy and scanning electron microscopy system / Ute Wenzel. Gutachter : D. Frank Ogletree ; Teodor P. Gotszalk. Betreuer : Ivo W. Rangelow ». Ilmenau : Universitätsbibliothek Ilmenau, 2013. http://d-nb.info/1034527770/34.

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Livres sur le sujet "Actuating"

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Yang, W., dir. IUTAM Symposium on Mechanics and Reliability of Actuating Materials. Dordrecht : Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4131-4.

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Vladimir, Krejnin German, dir. Pneumatic actuating systems for automatic equipment : Structure and design. Boca Raton : Taylor & Francis, 2006.

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IUTAM Symposium on Mechanics and Reliability of Actuating Materials (2004 Beijing, China). IUTAM Symposium on Mechanics and Reliability of Actuating Materials : Proceedings of the IUTAM Symposium held in Beijing, China, 1-3 September, 2004. Dordrecht : Springer, 2006.

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Dobson, Jon, et Carlos Rinaldi, dir. Nanomagnetic Actuation in Biomedicine. Boca Raton : Taylor & Francis, 2017. : CRC Press, 2018. http://dx.doi.org/10.1201/9781315356525.

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Vyas, J. Jaidev, Balamurugan Gopalsamy et Harshavardhan Joshi. Electro-Hydraulic Actuation Systems. Singapore : Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2547-2.

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name, No. Variable valve actuation 2003. Warrendale, PA : Society of Automotive Engineers, 2002.

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Center, Langley Research, dir. Flutter suppression via piezoelectric actuation. Hampton, Va : National Aeronautics and Space Administration, Langley Research Center, 1991.

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Engineers, Society of Automotive, et SAE International Congress & Exposition (1993 : Detroit, Mich.), dir. Variable valve actuation and control. Warrendale, PA : Society of Automotive Engineers, 1993.

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C, Chenoweth C., dir. Aircraft flight control actuation system design. Warrendale, PA : Society of Automotive Engineers, 1993.

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Engineers, Society of Automotive, et SAE International Congress & Exposition (1996 : Detroit, Mich.), dir. Variable valve actuation and power boost. Warrendale, PA : Society of Automotive Engineers, 1996.

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Chapitres de livres sur le sujet "Actuating"

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McCloy, D., et D. M. J. Harris. « Actuating systems ». Dans Robotics : An Introduction, 82–104. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-010-9752-9_4.

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Kurniawan, Agus. « Sensing and Actuating ». Dans Practical Contiki-NG, 137–65. Berkeley, CA : Apress, 2018. http://dx.doi.org/10.1007/978-1-4842-3408-2_5.

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Kurniawan, Agus. « Sensing and Actuating ». Dans Arduino Programming with .NET and Sketch, 45–68. Berkeley, CA : Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2659-9_3.

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Ionov, Leonid. « Actuating Hydrogel Thin Films ». Dans Responsive Polymer Surfaces, 137–57. Weinheim, Germany : Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527690534.ch6.

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Vincent, Julian F. V. « Actuating Systems in Biology ». Dans Polymer Sensors and Actuators, 371–83. Berlin, Heidelberg : Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04068-3_14.

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Weng, Kuo-Yao. « Thermolysis Reaction Actuating Pumps, TRAP ». Dans Micro Total Analysis Systems 2001, 409–10. Dordrecht : Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-1015-3_180.

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Kishi, Ryoichi. « Actuating Devices of Liquid-Crystalline Polymers ». Dans Polymer Sensors and Actuators, 259–72. Berlin, Heidelberg : Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04068-3_9.

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Jaillet, C., N. D. Alexopoulos et P. Poulin. « Carbon Nanotube Structures with Sensing and Actuating Capabilities ». Dans Solid Mechanics and Its Applications, 57–97. Dordrecht : Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4246-8_3.

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Chen, Chieh Li, et Kevin S. Li. « Control of Micro Press Using Magnetic Actuating Platform ». Dans Materials Science Forum, 1189–94. Stafa : Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-990-3.1189.

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Guo, Yanying, Xintian Lu, Tao Yan et Zhonghui Sun. « Modelling and Simulation of AMT Truck Clutch Actuating Mechanism ». Dans Lecture Notes in Electrical Engineering, 1391–400. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33738-3_38.

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Actes de conférences sur le sujet "Actuating"

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Davis, Felecia, Asta Roseway, Erin Carroll et Mary Czerwinski. « Actuating mood ». Dans the 7th International Conference. New York, New York, USA : ACM Press, 2013. http://dx.doi.org/10.1145/2460625.2460640.

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Lin, Chun-Ying, Tsung-Ying Tsai et Jin-Chen Chiou. « Design, fabrication and actuation of thermal actuating XY stage ». Dans 2011 IEEE 4th International Nanoelectronics Conference (INEC). IEEE, 2011. http://dx.doi.org/10.1109/inec.2011.5991776.

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Ong, Wen Jie, Ellen M. Sletten, Farnaz Niroui, Jeffrey H. Lang, Vladimir Bulovic et Timothy M. Swager. « Electromechanically actuating molecules ». Dans 2015 Fourth Berkeley Symposium on Energy Efficient Electronic Systems (E3S). IEEE, 2015. http://dx.doi.org/10.1109/e3s.2015.7336809.

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Lin, Chun-Ying, Tsung-Ying Tsai, Jin-Chen Chiou et Chin-Ping Chien. « Design, fabrication and actuation of 4-axis thermal actuating image stabilizer ». Dans 2011 IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2011. http://dx.doi.org/10.1109/nems.2011.6017327.

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Yuan, Sishen, Yue Wan, Yunxuan Mao, Shuang Song et Max Q. H. Meng. « Design of A Novel Electromagnetic Actuation System for Actuating Magnetic Capsule Robot ». Dans 2019 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2019. http://dx.doi.org/10.1109/robio49542.2019.8961655.

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Voronin, P. Yu. « Actuating mechanism of stomata movements ». Dans IX Congress of society physiologists of plants of Russia "Plant physiology is the basis for creating plants of the future". Kazan University Press, 2019. http://dx.doi.org/10.26907/978-5-00130-204-9-2019-105.

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Sarkar, Neil, Mostafa Azizi, Siamak Fouladi et R. R. Mansour. « Self-actuating scanning microwave microscopy probes ». Dans 2012 IEEE/MTT-S International Microwave Symposium - MTT 2012. IEEE, 2012. http://dx.doi.org/10.1109/mwsym.2012.6259774.

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Menard, C., et G. L. Gissinger. « Actuating System for Fuel Energy Management ». Dans Aerospace Technology Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1995. http://dx.doi.org/10.4271/951993.

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Varkani, Ali Karimi, et Ali Daraeepour. « Simultaneous sensing cum actuating linear motor ». Dans 2013 4th Power Electronics, Drive Systems & Technologies Conference (PEDSTC). IEEE, 2013. http://dx.doi.org/10.1109/pedstc.2013.6506737.

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Shin, Joongi, Woohyeok Choi, Uichin Lee et Daniel Saakes. « Actuating a Monitor for Posture Changes ». Dans CHI '18 : CHI Conference on Human Factors in Computing Systems. New York, NY, USA : ACM, 2018. http://dx.doi.org/10.1145/3170427.3188562.

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Rapports d'organisations sur le sujet "Actuating"

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Chung, Soon-Jo, et Ashraf Bastawros. Bio-Inspired Flexible Cellular Actuating Systems. Fort Belvoir, VA : Defense Technical Information Center, novembre 2013. http://dx.doi.org/10.21236/ada607045.

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Jeffrey Gutterman et A. J. Lasley. Variable Valve Actuation. Office of Scientific and Technical Information (OSTI), août 2008. http://dx.doi.org/10.2172/993477.

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Hogan, Alexander Lee. Electromagnetic rotational actuation. Office of Scientific and Technical Information (OSTI), août 2010. http://dx.doi.org/10.2172/1002095.

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Schroeder, J. A., et S. A. Eide. Firewater system inadvertent actuation frequency. Office of Scientific and Technical Information (OSTI), août 1991. http://dx.doi.org/10.2172/10142139.

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Schroeder, J. A., et S. A. Eide. Firewater system inadvertent actuation frequency. Office of Scientific and Technical Information (OSTI), août 1991. http://dx.doi.org/10.2172/5534273.

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Glezer, Ari. Fluidic Actuation and Control of Munition Aerodynamics. Fort Belvoir, VA : Defense Technical Information Center, août 2009. http://dx.doi.org/10.21236/ada519561.

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Karaman, Ibrahim, et Dimitris C. Lagoudas. Magnetic Shape Memory Alloys with High Actuation Forces. Fort Belvoir, VA : Defense Technical Information Center, janvier 2006. http://dx.doi.org/10.21236/ada447252.

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Appa, K., J. Ausman et N. S. Khot. Smart Actuation Systems for Enhanced Aircraft Maneuver Performance. Fort Belvoir, VA : Defense Technical Information Center, octobre 1998. http://dx.doi.org/10.21236/ada366980.

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Spoerke, Erik David, Gayle Echo Thayer, Maarten Pieter de Boer, Bruce Conrad Bunker, Jun Liu, Alex David Corwin, Jennifer Marie Gaudioso et al. Assembly and actuation of nanomaterials using active biomolecules. Office of Scientific and Technical Information (OSTI), novembre 2005. http://dx.doi.org/10.2172/875628.

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Shapiro, Benjamin. Nastic Actuation : Electroosmotic Pumping for Shape-Changing Materials. Fort Belvoir, VA : Defense Technical Information Center, février 2012. http://dx.doi.org/10.21236/ada564173.

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