Download or read book Investigation of Dielectric Elastomer Actuation for Printable Mechatronics written by Jeremy Risner and published by . This book was released on 2008 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Smart Materials in Additive Manufacturing volume 1 4D Printing Principles and Fabrication written by Mahdi Bodaghi and published by Elsevier. This book was released on 2022-06-25 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart Materials in Additive Manufacturing, Volume 1 provides readers with an overview of the current smart materials widely in use and the techniques for additively manufacturing them. It demonstrates the principles developed for 4D printing in a way that is useful for students, early career researchers, and professionals. Topics covered include modeling and fabrication of 4D printed materials such as dielectric elastomer soft robots, low-voltage electroactive polymers, and stimuli-responsive hydrogels. 4D printing of light-responsive structures, gels and soft materials, and natural fiber composites are also discussed, as is origami-inspired 4D printing, 4D microprinting, and reversible 4D printing. 4D bioprinting and related biomedical applications are outlined as well as functionalized 4D printed sensor systems. Key Features:* Discusses 4D printed shape memory polymers, shape memory alloys, natural fibers, and hydrogels* Covers various types of stimuli, fabrication techniques, multi-physics modeling, and control strategies for 4D printing* Explores 4D printing of dielectric elastomers, liquid crystal elastomers, and electroactive polymers Covers the mechanics, manufacturing processes and applications of 4D-printed smart materials and structures Discusses applications in civil, mechanical, aerospace, polymer and biomedical engineering Presents experimental, numerical and analytical studies in a simple and straightforward manner, providing tools that can be immediately implemented and adapted by readers to fit their work

Download or read book Dielectric Elastomers as Electromechanical Transducers written by Federico Carpi and published by Elsevier. This book was released on 2011-09-06 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric Elastomers as Electromechanical Transducers provides a comprehensive and updated insight into dielectric elastomers; one of the most promising classes of polymer-based smart materials and technologies. This technology can be used in a very broad range of applications, from robotics and automation to the biomedical field. The need for improved transducer performance has resulted in considerable efforts towards the development of devices relying on materials with intrinsic transduction properties. These materials, often termed as “smart or “intelligent , include improved piezoelectrics and magnetostrictive or shape-memory materials. Emerging electromechanical transduction technologies, based on so-called ElectroActive Polymers (EAP), have gained considerable attention. EAP offer the potential for performance exceeding other smart materials, while retaining the cost and versatility inherent to polymer materials. Within the EAP family, “dielectric elastomers , are of particular interest as they show good overall performance, simplicity of structure and robustness. Dielectric elastomer transducers are rapidly emerging as high-performance “pseudo-muscular actuators, useful for different kinds of tasks. Further, in addition to actuation, dielectric elastomers have also been shown to offer unique possibilities for improved generator and sensing devices. Dielectric elastomer transduction is enabling an enormous range of new applications that were precluded to any other EAP or smart-material technology until recently. This book provides a comprehensive and updated insight into dielectric elastomer transduction, covering all its fundamental aspects. The book deals with transduction principles, basic materials properties, design of efficient device architectures, material and device modelling, along with applications. Concise and comprehensive treatment for practitioners and academics Guides the reader through the latest developments in electroactive-polymer-based technology Designed for ease of use with sections on fundamentals, materials, devices, models and applications

Download or read book Inkjet Printing as a Fabrication Tool for Dielectric Elastomer Actuator Electrodes and Microfluidics written by Canangama Arachchige Vimantha Sahan Jayatissa and published by . This book was released on 2019 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrostatic actuators, like Dielectric Elastomer Actuators (DEA), have provided new avenues of research in soft robotics due to their high strain, high energy density, simple physical structure and compliance. The actuation characteristics of a DEA are heavily influenced by electrode shape, materials and thickness homogeneity and producing reproducible electrodes results in better actuation that improves the applications that utilize DEAs. Current fabrication methods have limitations that prevent the rapid prototyping of different electrode designs consistently. The use of inkjet printing as a fabrication methods for electrodes is explored. Material properties, like viscosity and surface tension, play an important role in the development of a printable ink. The effects of these properties were analysed. To enable better optimization of inks, a reusable cartridge for the inkjet printer (Dimatix DMP 2850) used was developed. The ink development and printing of carbon-black electrodes was carried out initially. However, creating an ink and jetting waveform for carbon-based electrodes was seen to be a tedious, time-consuming task. A novel method of electrode fabrication using a printed sacrificial layer is presented as a means to deal with this issue. The development printable sacrificial layer ink is presented and a quantitative analysis of the effects of the addition of a surfactant to the ink is carried out. The method helps utilize the advantages of inkjet printing as a fabrication method while still allowing use of different electrode materials. The use of the printed sacrificial layer for the fabrication of microfluidic channels and reservoirs was explored. The process for creating a fully printed, DEA integrated microfluidic chip was presented and it was used for the fabrication of a hydraulically amplified self-healing electrostatic (HASEL) actuator , which is another type of a electrostatic actuator. Further developments would include refining the fabrication process and exploring its use in other electrostatic actuator applications.

Download or read book Electrostatic Behavior of Dielectric Elastomer Actuators with Discrete Electrodes written by Adam Foster and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Over the past couple of years, the field of soft robotics has seen tremendous expansion. As humans are looking towards a more collaborative, symbiotic relationship robots, actuators that are compliant and that do not employ a rigid frame are essential. One type of actuator that is currently being proposed is the Dielectric Elastomer Actuator (DEA), which use Coulomb force of attraction between two electrodes to generate motion. DEAs are often referred to as artificial biological muscle because they share many of the properties of biological muscle (high energy density, compliance, natural damper). However, they do have some severe limitations that prevent their use in commercial applications, the most severe of limitations is that DEAs require very high voltages to operate (order of kilovolts). The possibility of lowering the actuation voltage seems to have been overlooked in the literature. In this research project, a solution to this problem is investigated, using multiple segments, instead of one continuous electrode. The major component being investigated is the geometry of the actuator as it relates to the behavior of the actuator and its actuation voltage. Two sets of actuators with different geometries were investigates, three identical versions of each actuator were manufactured, and all were tested below 7,000 volts. Video recordings were acquired between each voltage step, each were then processed and position data for the actuator was extracted for analysis. The main findings for this research showed that when the overall electro-active area was conserved, it was possible to manufacture multi-segmented dielectric elastomer actuators (MSDEAs) that performed better than its non-segmented counterpart. Segmented electrodes pave the way towards a new class of DEA. Those new actuators have the potential of being implantable inside of the human body, allowing for a new class of assistive prosthetics to be developed."--Abstract.

Download or read book Robotics and Mechatronics written by Chin-Hsing Kuo and published by Springer Nature. This book was released on 2019-09-26 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the latest advances, innovations and applications in the field of robotics and mechatronics, as presented by leading international researchers and engineers at the 6th IFToMM International Symposium on Robotics and Mechatronics (ISRM), held in Taipei, Taiwan, on October 28–30, 2019. It covers highly diverse topics, including mechanism synthesis, analysis, and design, kinematics and dynamics of multibody systems, modelling and simulation, sensors and actuators, novel robotic systems, industrial- and service-related robotics and mechatronics, medical robotics, and historical developments in robotics and mechatronics. The contributions, which were selected through a rigorous international peer-review process, share exciting ideas that spur novel research directions and foster new, multidisciplinary collaborations.

Download or read book Partial Discharge Detection in Dielectric Elastomer Actuator Systems written by Daniel Paul Muffoletto and published by . This book was released on 2015 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric elastomers are a class of field-driven electroactive polymers which utilize a soft dielectric and compliant electrodes to couple electric fields to mechanical strains. As actuators, the charge stored on opposing electrodes generates a compressive force on the soft elastomeric dielectric, and when used as a generator, the changing capacitance resulting from cyclic stretching of the dielectric can be used harvest electrical energy. In both cases, a major limiting factor to either the output force of an actuator or the energy per cycle of a generator is the maximum field strength across the dielectric. Other factors include the elastomer's dielectric constant and the stiffness both of the dielectric and of the electrodes. If the maximum field strength is exceeded the dielectric will fail, generating a conductive path between electrodes, which renders the dielectric non-functional. This event is known as dielectric breakdown. Partial discharges are instances of an electrical discharge partially bridging the dielectric in response to an applied voltage stress, typically at points of concentrated electric field or at material defects or other inhomogeneities in the dielectric. Depending on the discharge amplitude, partial discharge activity typically results in damage to the dielectric. Since partial discharge degradation is a slow process that worsens with time, partial discharge detection is a common method to assess the health of an insulating system. Several unique attributes of dielectric elastomers make the study of their dielectric breakdown particularly interesting, and will be touched on in this work. Due to their intentionally low elastic modulus, electromechanical effects are more apparent in the causes of breakdown and degradation in comparison to the more rigid dielectric materials traditionally used as high voltage insulators. In particular, electrical tree propagation resulting from internal partial discharges is a function of the material's elastic modulus. Also, in contrast to many other high voltage systems where operation below the rated voltage is not worthwhile, such as in power distribution applications, dielectric elastomer systems will still operate when lower voltages are applied, albeit at lower output energies. This can allow for real-time sensing for symptoms of degradation in the elastomer to provide feedback to the elastomer's controller, preventing further damage to the dielectric. The goal of this research is to investigate partial discharge activity in the acrylic elastomers (VHB4910 films from 3M) commonly used in dielectric elastomer actuators and generators. Since partial discharge activity can occur due to internal defects or due to external factors such as electrode material or geometry, a series of breakdown studies are presented in this work, starting first with ideal electrodes in an environment free of external partial discharges and progressing to the more realistic scenario of a powdered carbon electrode where discharges between electrode particles are expected. Data of the partial discharge amplitudes that accompany the breakdown event and images of the electrical trees that form at the breakdown site are presented. The presence of partial discharge activity prior to breakdown and the electrical trees observed indicate that degradation due to internal partial discharges is a viable breakdown mechanism for dielectric elastomers, even in the most ideally prepared test environment. These results show that sub-picoCoulomb sensitivities are required if a detection system were to react to signs of damage due to partial discharges in dielectric elastomers, and that partial discharge activity due to surface discharges in a powdered electrode system can mask the detection of internal discharges that indicate the growth of an electrical tree.

Download or read book Synthesizing New Dielectric Elastomers for Actuation written by Wei Hu and published by . This book was released on 2015 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric elastomers can be actuated under electric field responding to electrostatic force. Compared with other electrical actuation technologies, the advantages of dielectric elastomer actuators include: light weight, good compliancy, large actuation strain, high energy density, quiet operation and low cost. As the active part of an actuator device, the dielectric elastomer material plays a central role. However, most popular elastomers used for dielectric actuation are commercial products designed for other applications. And their confidential formulations also make it difficult to understand the mechanism and further improve the actuation performances. Therefore, the development of new dielectric elastomers from molecular level is of great importance. One subject in this dissertation is the synthesis of a group new dielectric elastomers from molecular level which demonstrate high actuation strains. These dielectric elastomers are polyacrylate formulations with n-butyl acrylates as the based monomer and formed through ultra-violet polymerization. The influences of acrylic acid in the formulation on the mechanical and dielectric properties are investigated. The optimal formulation demonstrates an area actuation strain of 186 %, a dielectric strength of 222 MV/m and an energy density as high as 1.4 MJ/m3. As the dielectric constant of a dielectric elastomer plays a significant role in its actuation performances, one focus of this dissertation is to improve the dielectric constant by utilizing nanocomposites. Aluminum nanoparticles with a self-passivated oxide shell are used as the conductive fillers to increase the dielectric constant of a polyacrylate elastomer while retaining a high dielectric strength. With the addition of 4 vol% Al nanoparticles, the nanocomposite has a dielectric constant as high as 8.4 with a maximum actuation strain of 56 %, a dielectric strength of 140 MV/m and a maximum actuation pressure of 1.5 MPa. Another focus of this dissertation is the innovation of a dielectric elastomer with tunable stiffness. This novel elastomer contains furan-maleimide Diels-Alder adduct moieties as the dynamic bonding. The moduli of these elastomers can be tuned reversibly and incrementally through modulating their crosslinking densities via thermal treatments at moderate temperatures. Capacitive sensors and actuators which can work in multiple modes were fabricated using the new materials.

Download or read book Control Instrumentation and Mechatronics Theory and Practice written by Norhaliza Abdul Wahab and published by Springer Nature. This book was released on 2022-07-07 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceeding includes original and peer-reviewed research papers from the 3rd International Conference on Control, Instrumentation and Mechatronics Engineering (CIM2022). The conference is a virtual conference held on 2-3 March 2022. The topics covered latest work and finding in the area of Control Engineering, Mechatronics, Robotics and Automation, Artificial Intelligence, Manufacturing, Sensor, Measurement and Instrumentation. Moreover, the latest applications of instrumentations, control and mechatronics are provided. Therefore, this proceeding is a valuable material for researchers, academicians, university students and engineers.

Download or read book Dielectric Elastomer Actuators for Binary Robotics and Mechatronics written by Jean-Sébastien Plante (Ph. D.) and published by . This book was released on 2006 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) Also, analytical models revealed that viscoelasticity and current leakage through the film govern performance. These results are verified by an in-depth experimental characterizion of DE actuation. A new DE actuator concept using multi-layered diamond-shaped films is proposed. Essential design tools such as reliability/performance trade-offs maps, scaling laws, and design optimization metrics are proposed. A unit binary module is created by combining DE actuators with bistable structures to provide intermittent motion in applications requiring long-duration stateholding. An application example of binary robots for medical interventions inside Magnetic Resonance Imaging (MRI) systems illustrates the technology's potential.

Download or read book Mechatronics 2019 Recent Advances Towards Industry 4 0 written by Roman Szewczyk and published by Springer Nature. This book was released on 2019-08-28 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers papers presented at Mechatronics 2019, an international conference held in Warsaw, Poland, from September 16 to 18, 2019. The contributions discuss the numerous, multidisciplinary technological advances in the field of applied mechatronics that the emerging Industry 4.0 has already yielded. Each chapter presents a particular example of interdisciplinary theoretical knowledge, numerical modelling and simulation, or the application of artificial intelligence techniques. Further, the papers show how both software and physical devices can be incorporated into mechatronic systems to increase production efficiency and resource savings. The results and guidelines presented here will benefit both scientists and engineers looking for solutions to specific industrial and research problems.

Download or read book Soft Robotics based on Electroactive Polymers written by Guoying Gu and published by Frontiers Media SA. This book was released on 2021-06-17 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Level Set Methods and Dynamic Implicit Surfaces written by Stanley Osher and published by Springer Science & Business Media. This book was released on 2006-04-06 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very hot area with a wide range of applications; Gives complete numerical analysis and recipes, which will enable readers to quickly apply the techniques to real problems; Includes two new techniques pioneered by Osher and Fedkiw; Osher and Fedkiw are internationally well-known researchers in this area

Download or read book Advanced Mechatronics and MEMS Devices written by Dan Zhang and published by Springer Science & Business Media. This book was released on 2012-09-14 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Mechatronics and MEMS Devicesdescribes state-of-the-art MEMS devices and introduces the latest technology in electrical and mechanical microsystems. The evolution of design in microfabrication, as well as emerging issues in nanomaterials, micromachining, micromanufacturing and microassembly are all discussed at length in this volume. Advanced Mechatronics also provides a reader with knowledge of MEMS sensors array, MEMS multidimensional accelerometer, artificial skin with imbedded tactile components, as well as other topics in MEMS sensors and transducers. The book also presents a number of topics in advanced robotics and an abundance of applications of MEMS in robotics, like reconfigurable modular snake robots, magnetic MEMS robots for drug delivery and flying robots with adjustable wings, to name a few.

Download or read book Electroactive Polymer EAP Actuators as Artificial Muscles written by Yoseph Bar-Cohen and published by SPIE Press. This book was released on 2004 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the field of EAP with attention to all aspects and full infrastructure, including the available materials, analytical models, processing techniques, and characterization methods. This second edition covers advances in EAP in electric EAP, electroactive polymer gels, ionomeric polymer-metal composites, and carbon nanotube actuators.

Download or read book Electroactive Polymers for Robotic Applications written by Kwang J. Kim and published by Springer Science & Business Media. This book was released on 2007-01-17 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamental properties, modeling, and demonstration of Electroactive polymers in robotic applications. It particularly details artificial muscles and sensors. In addition, the book discusses the properties and uses in robotics applications of ionic polymer–metal composite actuators and dielectric elastomers.

Download or read book Electroactivity in Polymeric Materials written by Lenore Rasmussen and published by Springer Science & Business Media. This book was released on 2012-03-02 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroactivity in Polymeric Materials provides an in-depth view of the theory of electroactivity and explores exactly how and why various electroactive phenomena occur. The book explains the theory behind electroactive bending (including ion-polymer-metal-composites –IPMCs), dielectric elastomers, electroactive contraction, and electroactive contraction-expansion cycles. The book also balances theory with applications – how electroactivity can be used – drawing inspiration from the manmade mechanical world and the natural world around us.