Academic literature on the topic 'Microactuators ( Design and construction)'

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Journal articles on the topic "Microactuators ( Design and construction)"

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Osman, Salah Eldeen, and Musaab Zarog. "Optimized V-Shaped Beam Micro-Electrothermal Actuator Using Particle Swarm Optimization (PSO) Technique." Micro and Nanosystems 11, no. 1 (April 2, 2019): 62–67. http://dx.doi.org/10.2174/1876402911666190208162346.

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Background: Electrothermal microactuators are very promising for wide range of Microelectromechanical Systems (MEMS) applications due to the low voltage requirement and large force produced. Method: A new optimized V-beam electrothermal micro actuator was implemented in variable optical attenuator. In this work, Particle Swarm Optimization (PSO) technique is proposed to design the Vshaped beam. Result: The approach has successfully improved both angular displacement & output force of the microactuator. Entropy generation rate was used as optimization criteria.
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Lao, Zhaoxin, Neng Xia, Shijie Wang, Tiantian Xu, Xinyu Wu, and Li Zhang. "Tethered and Untethered 3D Microactuators Fabricated by Two-Photon Polymerization: A Review." Micromachines 12, no. 4 (April 20, 2021): 465. http://dx.doi.org/10.3390/mi12040465.

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Microactuators, which can transform external stimuli into mechanical motion at microscale, have attracted extensive attention because they can be used to construct microelectromechanical systems (MEMS) and/or microrobots, resulting in extensive applications in a large number of fields such as noninvasive surgery, targeted delivery, and biomedical machines. In contrast to classical 2D MEMS devices, 3D microactuators provide a new platform for the research of stimuli-responsive functional devices. However, traditional planar processing techniques based on photolithography are inadequate in the construction of 3D microstructures. To solve this issue, researchers have proposed many strategies, among which 3D laser printing is becoming a prospective technique to create smart devices at the microscale because of its versatility, adjustability, and flexibility. Here, we review the recent progress in stimulus-responsive 3D microactuators fabricated with 3D laser printing depending on different stimuli. Then, an outlook of the design, fabrication, control, and applications of 3D laser-printed microactuators is propounded with the goal of providing a reference for related research.
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Bonciani, Giovanni, Gaetano Biancucci, Simona Fioravanti, Vagif Valiyev, and Antonello Binni. "Learning Micromanipulation, Part 2: Term Projects in Practice." Actuators 7, no. 3 (September 3, 2018): 56. http://dx.doi.org/10.3390/act7030056.

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This paper describes the activities that have been necessary to design, fabricate, control and test some low-cost test stands independently developed by the students enrolled in the course of Micro-Nano sensors and actuators for the postgraduate course in Industrial Nanotechnologies Engineering of the University of Rome La Sapienza. The construction and use of these test stands are an essential part of teaching and learning methods whose theoretical bases have been presented in the companion paper (Part 1). Each test stand is composed of a compliant structure and a control system, which consists of a programmable control micro-card equipped with sensors and actuators. The compliant structure consists of a compliant mechanism whose geometry is achieved by scaling some previously developed silicon micromanipuators and microactuators up to the macroscale by a factor of 20. This macroscale model offered a kinesthetic tool to improve the understanding of the original microsystems and their working principles. The original silicon micromechanisms have been previously presented in the literature by the research group after design and deep reactive-ion etching (DRIE) microfabrication. Scaling from micro to macro size was quite easy because the original DRIE masks were bestowed to the students in the form of CAD files. The samples at the macroscale have been fabricated by means of recently available low-cost 3D printers after some necessary modifications of the mask geometry. The purpose of the whole work (Parts 1 and 2) was the improvement of the efficiency of an educational process in the field of microsystem science. By combining the two companion papers, concerning, respectively, the theoretical basis of the teaching methods and the students’ achievements, it is possible to conclude that, in a given class, there may be some preferred activities that are more efficient than others in terms of advancements and satisfaction.
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Ishida, A., M. Sato, W. Yoshikawa, and O. Tabata. "Graphical design for thin-film SMA microactuators." Smart Materials and Structures 16, no. 5 (August 8, 2007): 1672–77. http://dx.doi.org/10.1088/0964-1726/16/5/020.

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Karbasi, Seyed Majid, Mahnaz Shamshirsaz, Mahyar Naraghi, and Mohammad Maroufi. "Optimal design analysis of electrothermally driven microactuators." Microsystem Technologies 16, no. 7 (December 18, 2009): 1065–71. http://dx.doi.org/10.1007/s00542-009-0959-2.

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Nami, Z., C. H. Ahn, and M. G. Allen. "An energy-based design criterion for magnetic microactuators." Journal of Micromechanics and Microengineering 6, no. 3 (September 1, 1996): 337–44. http://dx.doi.org/10.1088/0960-1317/6/3/006.

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Nami, Z., C. H. Ahn, and M. G. Allen. "An energy-based design criterion for magnetic microactuators." Journal of Micromechanics and Microengineering 6, no. 4 (December 1, 1996): 447. http://dx.doi.org/10.1088/0960-1317/6/4/012.

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DeVoe, D. L., and A. P. Pisano. "Modeling and optimal design of piezoelectric cantilever microactuators." Journal of Microelectromechanical Systems 6, no. 3 (1997): 266–70. http://dx.doi.org/10.1109/84.623116.

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Najar, F., S. Choura, S. El-Borgi, E. M. Abdel-Rahman, and A. H. Nayfeh. "Modeling and design of variable-geometry electrostatic microactuators." Journal of Micromechanics and Microengineering 15, no. 3 (December 17, 2004): 419–29. http://dx.doi.org/10.1088/0960-1317/15/3/001.

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Chandel, Rajeevan, and Ashwani Kumar. "Design and Development of Dielectric based Electrostatic Microactuators." IETE Journal of Research 46, no. 4 (July 2000): 261–64. http://dx.doi.org/10.1080/03772063.2000.11416165.

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Dissertations / Theses on the topic "Microactuators ( Design and construction)"

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Fu, Yao, and n/a. "Design of a hybrid magnetic and piezoelectric polymer microactuator." Swinburne University of Technology. Industrial Research Institute Swinburne, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20060712.141636.

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Microsensors and microactuators are considered to be the most crucial elements of micro-electromechanical systems (MEMS) and devices. There has been growing interest in the development of new microactuator technologies with an increasing requirement for low cost microswitch arrays providing large air gap and large force at the same time. In particular, large air gap/large force microactuators are essential for high voltage switching in automobile electronics, test equipment switchboards and in network remote reconfiguration. The necessity to reduce the size of actuators and at the same time increase the force and the air gap has placed severe constraints on the suitability of current microactuator technology for various applications. This has led to the development of new actuator technologies based on novel materials or modifying existing systems. As an effort in this direction, this thesis presents the details of the work on the design, fabrication and testing of a new hybrid microactuator, combining electromagnetic and piezoelectric actuation mechanisms. The design and fabrication of electromagnetic actuators using planar coils and a soft magnetic core has long been established. However, in many instances these designs are constrained by difficulties in the fabrication of the multi layer planar coils, which is tedious, often resulting in a low yield. Hence device performance is limited by the maximum coil currents and thereby the maximum force able to be generated. In order to overcome these problems, a hybrid actuator combining the electromagnetic system along side of a piezoelectric actuation is proposed. This has been demonstrated to assist in enhancing the total force and consequently achieving larger actuator displacements. In this research a hybrid microactuator with a footprint of 10 mm2 was designed, fabricated and tested. It can generate 330 쎠force and cover 100 쭠air gap as a microswitch. Piezoelectric actuation has been used for many applications, due to its high precision and speed. In these applications, piezo-ceramic materials, such as PZT and ZnO were commonly used because they exhibit large piezoelectric coefficients. However, there are also some difficulties associated with their use. Piezoelectric ceramic materials are usually brittle, and have a relatively large Young?s modulus, thus limiting the achievable strain. Furthermore, the deposition technologies required for preparing thin/thick films of these ceramic materials need extensive optimization. Patterning these films into required structures is also difficult. Hence, piezoelectric polymer polyvinylidene fluoride (PVDF) is chosen in this work in spite of the fact that these materials have relatively lower piezoelectric coefficients. However, the low numerical Young?s modulus values of these polymers facilitates large strain in the piezoelectric actuators. The hybrid microactuator designed in this work comprises a piezoelectric composite polymer cantilever with a planar electromagnetic coil structure beneath. The composite cantilever consists of polarized piezoelectric polymer PVDF with an electroplated permalloy layer on one side. The device includes a permalloy core at the centre of a copper micro coil with a permanent magnetic film attached on the other side of the silicon wafer (substrate) and is aligned axially with the permalloy core. The cantilever is suspended from an electroplated 150 mm high nickel post. Initially the principle was tested using hand wound electromagnetic coils with permalloy wire as the core. The performance of such a hybrid actuator was evaluated. In the next stage, a microactuator was fabricated using completely planar micro technologies, such as high aspect ratio SU-8 lithography, laser micromachining, microembossing, as well as copper and permalloy electroplating. This micro device was designed by modelling and finite element method simulation using ANSYS 7.1 and CoventorWare electromagnetic and piezoelectric solvers respectively. This helped in understanding the critical aspects of the design at the same time leading to the determination of the optimum parameters for the cantilever, micro coils and the core. An analytical model has also been developed to validate the numerical results obtained from finite element analysis. The devices were tested and the experimental data obtained were compared with the simulation results obtained from both the finite element calculations and from the analytical model. Good agreement was found between the experimental results and the simulation.
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Wan, Weijie 1982. "Simulation and optimization of MEMS actuators and tunable capacitors." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99798.

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Micro-Electro-Mechanical Systems (MEMS) have played an important role in modern microelectronics, thermal, mechanical and hybrid systems. MEMS technology is a very promising means that might have a great impact on almost every corner of the society. Although many design methodology of MEMS already exists, not as much attention was given to the synthesis and optimization of MEMS devices. This thesis focuses on the optimization of MEMS actuators and MEMS tunable comb drive capacitors. The optimization is based on changing device geometry to achieve desired output parameter profile. For example in the design of MEMS tunable comb drive capacitors, the output parameter is the capacitance tuning range. Numerical experiments were performed to show the successful implementation of the optimization method.
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Wu, Zhi Gang. "Design, analysis and experiment of novel compliant micromanipulators with grippers driven by PZT actuators." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3691021.

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Rojanapornpun, Olarn Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Microfabrication technology for an integrated monolithic electromagnetic microactuator based on polymer bonded permanent magnet." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/27014.

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Electromagnetic microactuators with permanent magnets have many potential applications such as micro-energy scavengers, microswitches, micromirrors and microfluidics. However, many electromagnetic microactuator designs utilize either external permanent magnet or external coil, which do not allow tight integration to other MEMS components and further miniaturization. Furthermore, all of the available permanent magnet microfabrication technologies have some drawbacks and improvements are required. Thus the integrated monolithic electromagnetic microactuator is investigated in this project. The three main components of the electromagnetic actuator have been investigated separately. A novel microfabrication technology called ???Template printing???for the fabrication of polymer bonded permanent magnet has been investigated and developed. It is based on ???Screen printing??? which has its drawbacks on alignment accuracy and poor line definition. This is eliminated in ???Template printing??? by photolithography of the photoresist template. The shape and location of the permanent magnet is defined by the template. A new approach based on the filling of dry magnetic powder and vacuum impregnation has been developed to form the polymer bonded permanent magnet. This allows the use of short pot-life matrix material and the elimination of homogenous mixing. A monolithic electromagnetic microactuator has been fabricated successfully. It consists of a 2-layer planar copper microcoil, surface micromachined polyimide beam and Strontium ferrite/EPOFIX permanent magnet (diameter of 460 ??m and 30 ??m thickness). Large deflection in excess of 100 ??m at 35 mA driving current and magnetic force of 0.39 ??N/mA have been achieved. It compares favourably with other much larger electromagnetic actuators that have been reported. ???Template printing??? has the potential of being a low temperature batch process for the microfabrication of thick polymer bonded permanent magnets with high magnetic properties and low residual stress. The fabrication consistency and the quality of template printed magnet can be improved in future studies.
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Lee, Selene Ann. "The design and implementation of magnetic microactuators for MEMS-enabled ventricular catheters for hydrocephalus." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1779690331&sid=17&Fmt=2&clientId=48051&RQT=309&VName=PQD.

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Westerhoff, Kevin M. (Kevin Matthew) 1978. "Construction based design." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84827.

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Xie, Xiaoling. "Communications in construction design." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/7571.

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Construction design has become an increasingly complex synthesis activity for which effective solutions depend upon co-operative participation by a number of people. Thus communication, including the integration of specialised knowledge and negotiation of differences between team members, is a vital process for collaborative design. A questionnaire survey was initially conducted to investigate communication issues and problems, which had been highlighted from a review of the literature, in current construction design. The results confirmed that communication among the different construction team members is often difficult although of paramount important to design outcomes. Based on these results, case studies have been carried out to gain further insights into communication issues and problems, and explore why and how they are caused. Through the application of multiple approaches, a model has been developed, which suggests strategies that may help participants communicate more effectively and ultimately improve the quality of construction design outcomes.
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Soto, Leticia S. M. Massachusetts Institute of Technology. "Construction design as a process for flow : applying lean principles to construction design." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42995.

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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2007.
Includes bibliographical references (p. 108-111).
Delays and cost overruns are the rule rather than the exception in the construction industry. Design changes due to lack of constructability late in the construction phase generating costly ripple effect which create delay and disruption throughout the entire organization, are the largest contributors to the stated rule. In the building construction industry, of increased competitiveness, demand from many companies continued effort to develop new methods and tools, in which the design for quality, cost, construability and reliability play an important role. The planning and management of building design has historically focused upon traditional methods of planning such as Critical Path Method (CPM). Little effort is made to understand the complexities of the design process; instead design managers focus on allocating work packages where the planned output is a set of deliverables. This current design method forces design teams to manage their work on a discipline basis, each working on achieving their deliverable as dictated by the design program with little regard of the relationship with other disciplines and organizations. In addition, because Architect and Engineering firms view design and construction as two separate independent phases of work in project it makes it difficult to verify constructability in a design and create flow in the overall process. The goal of this study is to look at how aligning interests, objectives and practices based on lean fundamentals, during the earliest stages of a project, as a method of improving construction performance.
by Leticia Soto.
S.M.
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Chew, En Phin. "Superconducting Transformer Design and Construction." Thesis, University of Canterbury. Electrical and Computer Engineering, 2010. http://hdl.handle.net/10092/4977.

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This thesis first outlines the testing undertaken on a partial core superconducting transformer under open circuit, short circuit, full load and endurance test conditions. During the endurance test, a failure occurred after 1 minute and 35 seconds. During the failure, voltage dipping and rapid liquid nitrogen boil off was observed. This prompted a failure investigation which concluded that the lack of cooling in the windings was the most probable cause to the failure. Full core transformer and superconductor theories are then introduced. A copper winding transformer model, based on a Steinmetz equivalent circuit and a reverse design method, is described. A superconductor loss model which outlines the different types of losses experienced under AC conditions is used to determine the resistance of the windings in the Steinmetz equivalent circuit. This resistance changes with the magnitude of current and the strength of the magnetic field that is present in the gaps between each layer of the windings. An alternative leakage flux model is then presented, where the flux is modelled based on the combination of the reluctance of the core and the air surrounding the windings. Based on these theories, an iterative algorithm to calculate the resistance of the superconductor is developed. A new design of a 15kVA single phase full core superconducting transformer, operating in liquid nitrogen, is presented. The issues with building the superconducting transformer are outlined. First, a copper mockup of the superconducting transformer was designed where the mockup would have the same tape and winding dimensions as the superconducting transformer, which means the same core can be used for two different sets of windings. This led to designing a core that could be easily taken apart as well as reassembled. Construction of the core, the copper windings and the superconductor windings ensued. The process of cutting the core laminations, insulating the copper and superconductor tapes, and making the steel fasteners and terminations are described. The copper mockup and superconducting transformers was then tested under open circuit, short circuit, different load and endurance conditions at both liquid nitrogen and room temperatures. These test results were then compared with the those from two models. The comparison showed a significant inaccuracy in the reactances in the models. This introduced a correction factor into the superconductor model which ii made it more accurate. However, further work is required to explain and quantify the correction factors for the copper transformer model under different load conditions.
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Sebille, Michel. "Design :construction, automorphisms and colourings." Doctoral thesis, Universite Libre de Bruxelles, 2002. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211428.

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Books on the topic "Microactuators ( Design and construction)"

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Remiasz, Mile Victoria, ed. Hats, design & construction. 2nd ed. Evergreen Park, Ill: Hat Tree Studio, 1986.

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Furniture by design: Design, construction & technique. New York: Lyons & Burford, 1997.

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Costume construction. Englewood Cliffs, NJ: Prentice-Hall, 1989.

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Sustainable construction and design. Upper Saddle River, N.J: Pearson Education, 2010.

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Ambrose, James. Building construction and design. New York: Van Nostrand Reinhold, 1992.

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S, Lunde Anders, ed. Whirligigs: Design and construction. 2nd ed. Radnor, Pa: Chilton Book Co., 1986.

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Tomlinson, M. J. Foundation design and construction. 5th ed. Harlow: Longman, 1986.

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Tomlinson, M. J. Foundation design and construction. 5th ed. Harlow: ELBS with Longman, 1992.

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R, Boorman, ed. Foundation design and construction. 7th ed. Harlow: Prentice Hall, 2001.

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J, Tomlinson M. Foundation design and construction. Harlow: Longman, 1986.

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Book chapters on the topic "Microactuators ( Design and construction)"

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Judy, Jack W. "Microactuators." In MEMS: A Practical Guide to Design, Analysis, and Applications, 751–803. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-33655-6_14.

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Janssen, G., R. Gehrking, J. Edler, B. Ponick, and H. D. Stölting. "Electromagnetic Design of Microactuators." In Design and Manufacturing of Active Microsystems, 11–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-12903-2_2.

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Ghosh, Amitabha, and Burkhard Corves. "Design of Micromechanisms." In Introduction to Micromechanisms and Microactuators, 57–79. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2144-9_5.

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Stojiljković, Dušan, Lena Zentner, Nenad T. Pavlović, Sebastian Linβ, and René Uhlig. "Modeling, Design and Prototyping of a Pantograph-Based Compliant Mechanism." In Microactuators, Microsensors and Micromechanisms, 76–88. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61652-6_7.

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Wedrich, Karin, Maximilian Darnieder, Eric Vierzigmann, Alexander Barth, Rene Theska, and Steffen Strehle. "Conceptual Design of a Microscale Balance Based on Force Compensation." In Microactuators, Microsensors and Micromechanisms, 103–14. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61652-6_9.

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Waldschik, A., M. Feldmann, V. Seidemann, and S. Büttgenbach. "Development and Fabrication of Electromagnetic Microactuators." In Design and Manufacturing of Active Microsystems, 207–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-12903-2_12.

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Ganesan, V., K. Wiedmann, A. Beradinelli, S. Demmig, H. D. Stölting, and A. Mertens. "Drive Systems Based on Electromagnetic Microactuators." In Design and Manufacturing of Active Microsystems, 29–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-12903-2_3.

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Chen, J., C. Ruffert, H. H. Gatzen, R. Bandorf, and G. Bräuer. "Fabrication of Magnetic Layers for Electromagnetic Microactuators." In Design and Manufacturing of Active Microsystems, 167–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-12903-2_10.

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Pape, F., A. Waldschik, C. Ruffert, O. Traisigkhachol, M. Feldmann, T. Kohlmeier, V. Seidemann, S. Büttgenbach, and H. H. Gatzen. "Fabrication of Excitation Coils for Electromagnetic Microactuators." In Design and Manufacturing of Active Microsystems, 189–206. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-12903-2_11.

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Maisel, Jordana L., Edward Steinfeld, Megan Basnak, Korydon Smith, and M. Beth Tauke. "Construction." In Inclusive Design, 97–124. New York : Routledge, 2017. | Series: PocketArchitecture : technical design series: Routledge, 2017. http://dx.doi.org/10.4324/9781315712437-4.

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Conference papers on the topic "Microactuators ( Design and construction)"

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Kommepalli, Hareesh K. R., Andrew D. Hirsh, Christopher D. Rahn, and Srinivas A. Tadigadapa. "Piezoelectric T-Beam Microactuators." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49886.

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This paper introduces a novel T-beam actuator fabricated by a piezoelectric MEMS fabrication process. ICP-RIE etching from the front and back of a bulk PZT chip is used to produce stair stepped structures through the thickness with complex inplane shapes. Masked electrode deposition creates active and passive regions in the PZT structure. With a T-shaped crosssection, and bottom and top flange and web electrodes, a cantilevered beam can bend in-plane and out-of-plane with bimorph actuation in both directions. One of these T-beam actuators is fabricated and experimentally tested. An experimentally validated model predicts that the cross-section geometry can be optimized to produce higher displacement and blocking force.
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Voumard, Pierre, Patrick Debergh, G. Perregaux, and S. Gonseth. "Anodic oxidation in polysilicon microactuators." In Symposium on Design, Test, Integration, and Packaging of MEMS/MOEMS, edited by Bernard Courtois, Selden B. Crary, Kaigham J. Gabriel, Jean Michel Karam, Karen W. Markus, and Andrew A. O. Tay. SPIE, 2000. http://dx.doi.org/10.1117/12.382327.

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Zhou, Qingkun, Pinhas Ben-Tzvi, Azhar Iqbal, and Dapeng Fan. "Design, Analysis and Optimization of Magnetic Microactuators." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12765.

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Magnetic micro-electro-mechanical-systems (MEMS) present new class of micro-scale devices that incorporate magnetic materials as sensing or active elements. It exploits the properties of magnetic materials by incorporating them in conventional microfabricated systems. Although their application for microactuation purposes has been limited, the prospects of remote control and large displacements renders them useful, and even unavoidable in certain circumstances. Recognizing the fact that poor electromagnetic flux in micro domain happens to be the most stringent limitation, measures to improve the magnetic field generated by an electromagnetic coil are studied using a microactuator that incorporates a coil and a hard magnetic film deposited on a flexure membrane. This paper describes the design of the microactuator, analysis and optimization that maximizes the deflection. This study also presents an overview of magnetic microactuators covering the scaling effects, materials and processes used in their fabrication and critical review of their limitations.
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Sigmund, Ole. "Systematic design of microactuators using topology optimization." In 5th Annual International Symposium on Smart Structures and Materials, edited by Vijay K. Varadan, Paul J. McWhorter, Richard A. Singer, and Michael J. Vellekoop. SPIE, 1998. http://dx.doi.org/10.1117/12.320179.

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Kommepalli, Hareesh K. R., Christopher D. Rahn, and Srinivas A. Tadigadapa. "Optimization of Piezoelectric Uniflex Microactuators." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87594.

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Microactuators provide controlled motion and force for applications ranging from RF switches to rate gyros. Large amplitude response in piezoelectric actuators requires amplification of their small strain. This paper studies the performance of a uniflex actuator in terms of its displacement and blocking force compared to uniflex and flextensional actuators. A uniflex microactuator combines the strain amplification mechanisms of a unimorph and flexural motion to produce large displacement and blocking force. Analytical models for displacement and blocking force for all the three actuators are used in optimization, to study their relative performance. The uniflex actuator outperforms both unimorph and flextensional actuators in displacement, but, the unimorph actuator generates more blocking force. The uniflex actuator can therefore be used in applications that demand higher displacement and lower blocking force compared to a unimorph actuator.
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Barnett, A. R., and N. G. Naganathan. "Analysys of Piezoelectric Microactuators Using Finite Element Methods." In ASME 1989 Design Technical Conferences. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/detc1989-0064.

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Abstract Unlike conventional electromechanical actuators, piezoelectric actuators could be utilized to execute precise motions while exerting significantly high forces. In an attempt to pursue the design of a practical three-dimensional piezoelectric micro-actuator, it has become necessary to obtain a full understanding of how such materials behave under arbitrarily applied external voltages. The solution of the governing equations of piezoelectricity by the use of analytical methodologies for even moderately complex scenarios is effectively impossible, A numerical solution scheme based on the method of finite elements has been developed to analyze the deformations of and potentials within piezoelectric materials subjected to external static voltage loadings, A set of dedicated computer codes has been created to model piezoelectric three-dimensional geometries. The specimens chosen for the purpose of numerical studies are representative of real-world piezoceramic materials. The results are found to be in excellent agreement with published product data.
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Yixian Du, Qihua Tian, and Zhengjia Wu. "Optimal design of compliant thermal-structural microactuators with geometrical nonlinearities." In 2009 IEEE 10th International Conference on Computer-Aided Industrial Design & Conceptual Design. IEEE, 2009. http://dx.doi.org/10.1109/caidcd.2009.5374973.

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Puchades, Ivan, Robert Pearson, Lynn F. Fuller, Sara Gottermeier, and Sergey E. Lyshevski. "Design and Fabrication of Microactuators and Sensors for MEMS." In 2007 International Conference on Perspective Technologies and Methods in MEMS Design. IEEE, 2007. http://dx.doi.org/10.1109/memstech.2007.4283421.

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Joglekar, Manish M., and Dnyanesh N. Pawaskar. "Pull-In Dynamics of Variable-Width Electrostatic Microactuators." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59328.

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Determination of pull-in parameters is vital in the design of electrostatically actuated microdevices. Moreover, it is important to devise some means to gain a control over the pull-in parameters in order to establish the customized microactuator design practice. In this paper, we analyze the influence of the beam geometry on the dynamic pull-in parameters of electrostatically actuated microbeams. Novel width functions are proposed for the microcantilever and the fixed-fixed beam, which smoothly vary the width of the microbeam along its length. We demonstrate the use of these width-functions by comparing six different microbeam geometries, three for cantilevered beam and three for fixed-fixed beam along with their constant width rectangular counterparts. All configurations are analyzed using an energy technique which gives an upper bound on the critical amplitude of the microbeam displacement, which is subsequently used to extract a lower bound on the applied voltage at the point of dynamic pull-in instability. For every case, a comparison is made between the static and the dynamic pull-in parameters. Results indicate a greater pull-in range for concave beam geometries, while the convex geometries exhibit a reduction in the pull-in range. Actuation voltage requirement is found to be proportional to the increase in the travel range. In all cases, the dynamic pull-in displacement is found to be greater than the static pull-in displacement, while the dynamic pull-in voltage is found to be less than the static pull-in voltage.
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Harness, T. "Spurious mode suppression in electrostatic comb-drive X-Y microactuators." In IEE Seminar Microengineering, Modelling and Design. IEE, 1999. http://dx.doi.org/10.1049/ic:19990276.

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Reports on the topic "Microactuators ( Design and construction)"

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CORPS OF ENGINEERS WASHINGTON DC. Construction: Design and Construction Evaluation (DCE). Fort Belvoir, VA: Defense Technical Information Center, February 1996. http://dx.doi.org/10.21236/ada404141.

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Fanella, David A., Amaldo T. Derecho, and S. K. Ghosh. Design and construction of structural systems. Gaithersburg, MD: National Institute of Standards and Technology, 2005. http://dx.doi.org/10.6028/nist.ncstar.1-1av1.

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Slocum, Alexander H., Laura A. Demsetz, David H. Levy, and Bruce Schena. Design Methodology for Automated Construction Machines. Fort Belvoir, VA: Defense Technical Information Center, December 1987. http://dx.doi.org/10.21236/ada207386.

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Collins, James J. Design and Construction of Genetic Applets. Fort Belvoir, VA: Defense Technical Information Center, May 2003. http://dx.doi.org/10.21236/ada417910.

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Jackson, J. G. Y-12 Sustainable Design Principles for Building Design and Construction. Office of Scientific and Technical Information (OSTI), November 2008. http://dx.doi.org/10.2172/969028.

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CORPS OF ENGINEERS WASHINGTON DC. Engineering and Design. Construction with Large Stone. Fort Belvoir, VA: Defense Technical Information Center, October 1990. http://dx.doi.org/10.21236/ada402849.

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McNeese, L. E. ORNL engineering design and construction reengineering report. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/631227.

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Janet E.R. Mcllvaine, David Beal, and Philip Fairey. INTERIOR DUCT SYSTEM DESIGN, CONSTRUCTION, AND PERFORMANCE. Office of Scientific and Technical Information (OSTI), October 2001. http://dx.doi.org/10.2172/823970.

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Schwartztrauber, K. Modular Design/Phased Construction Alternative Evaluation Report. Office of Scientific and Technical Information (OSTI), May 1999. http://dx.doi.org/10.2172/763136.

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Hathaway, James L., Eric M. Small, and Jeffrey Hawkins. Military Construction Planning and Design Funding Requirements. Fort Belvoir, VA: Defense Technical Information Center, November 1990. http://dx.doi.org/10.21236/ada232347.

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