Relevant bibliographies by topics / Airplanes – Motors – Design and construction

Academic literature on the topic 'Airplanes – Motors – Design and construction'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Airplanes – Motors – Design and construction"

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Rakiec, Mateusz, Aleksandra Kwiecien, Rafal Muchowski, and Bartosz Kazmierski. "Design and Manufacturing Process of Micro Air Vehicles." MATEC Web of Conferences 257 (2019): 01003. http://dx.doi.org/10.1051/matecconf/201925701003.

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This paper shows shortly the designing, optimization and manufacturing process of light and compact, carbon fiber MAV. It also covers testing and results. The main purpose was to make an innovative prototype of UAV which is easy to transport, assembly and carry as much high volume payload as possible. The optimization process started from defining the constrains. To gain information needed to choose the best solution and perform optimization, authors made many tests. The material, which was chosen, had to be as light and durable as possible - this characteristics were later checked in tensile test of carbon fiber samples. The main optimization algorithm do initial research about the rest parameters of aircraft. The point was to narrow the range of analyzed chord’s values and find the best motors. For better performance the original airfoil was developed. It works perfectly in low Reynolds number area and has perfect characteristics for high-lift airfoils, compared to similar. It was later checked in CFD. The special manufacturing process of carbon fiber airplane was designed. After all the construction was tested. The successful flight tests confirmed that design process was appropriate and done well. All theoretical assumptions were also right.
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Жукевич, А. Б., and О. А. Жукевич. "СИНТЕЗ І НАПІВНАТУРНЕ МОДЕЛЮВАННЯ СИСТЕМИ УПРАВЛІННЯ ГІДРОПРИВОДУ З КОВЗНИМИ РЕЖИМАМИ." Open Information and Computer Integrated Technologies, no. 87 (June 30, 2020): 121–36. http://dx.doi.org/10.32620/oikit.2020.87.06.

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We consider the construction of servo-hydraulic drive of volumetric regulation system control relay type. A volumetric hydraulic actuator is used in agriculture, construction, transport machine, coal harvesters, rigs, airplanes, military machinery, etc. Hydraulic bulk drive have several advantages, most important of which are the possibility of obtaining a great effort, smooth operation, low inertia hydraulic machines, relatively high efficiency (up to 80%), high reliability. At the same time, he has a number of drawbacks, chief of which is the change in the properties of the working liquid during operation and under the influence of external factors. The disadvantages include loss of hydraulic oil, contamination of the liquid during operation. These shortcomings can lead to loss of quality control loss of accuracy, speed of working off of the set of control actions. One of the classes of systems which structurally provide high dynamic accuracy, there are systems operating in the sliding mode. In addition, due to the introduction of sliding mode in some cases it is possible to increase the degree of astaticism of the system, and hence to improve the playback quality of the input job. Proposed the implementation of a control system of hydraulic drive, is invariant to parametric and external disturbances through the use of sliding modes. To study the proposed control system with hydraulic drive constructed model of the developed system, which is the natural object of a hydraulic drive using its mathematical model, at the same time the control system is implemented physically is one that can be used in a real device. Hill simulation has allowed answering the questions of realization of sliding modes when controlling hydraulic drive of volumetric regulation through a DC motor. The behavior of a control system of hydraulic drive when changing the parameters of the control object (the moment of inertia, viscosity), which showed that the change of damping ratio within a wide range (up to 50% of the design) does not disrupt the sliding mode, the quality of the regulatory process does not deteriorate significantly. At the same time, the change to 100% conversion rate can lead to instability of the control system that allows to make a conclusion about the establishment of the position controller on the lesser of the possible damping coefficients. Also a study of digital implementation of the synthesized control law by introducing in the control loop time delay has been carried out, which is possible with the use of microprocessor-based calculator.
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Kazerooni, H., and S. Kim. "On the Design and Construction of Direct-Drive Robots." Journal of Engineering for Industry 112, no. 2 (May 1, 1990): 197–201. http://dx.doi.org/10.1115/1.2899568.

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In this research, a statically-balanced direct-drive manipulator is designed and constructed to achieve improved dynamic behavior for compliance control [10, 11, 12]. The manipulator mechanism, incorporating a four-bar linkage, is designed so that its functional parts are balanced in all positions without the addition of counterweights. The motors are never loaded by gravity. As a result, smaller motors with less torque can be used to achieve higher speed, accuracy, and repeatability in fine manipulation tasks. The robot is powered by high-torque AC synchronous motors. The mechanism is comprised of graphite-epoxy and AA7075T6 aluminum materials. The manipulator is controlled by a parallel processor computer.
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Meng, Fan Wei, and Yong Biao Hu. "Design Method and Parameters Matching of Electric Motors for Hybrid Construction Equipment." Advanced Materials Research 950 (June 2014): 160–64. http://dx.doi.org/10.4028/www.scientific.net/amr.950.160.

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Design methods of electric motors and reasonable parametric design principles for hybrid electric construction equipments are proposed. In accordance with the power performance, economical efficiency and electric transmission features of construction equipments, the new design method of electric motors which is an advanced application-centric design process are analyzed, and the design theory and calculation method of main parameters are discussed, so that theoretical basis is provided for the research and design of new electric drive construction equipments. Parametric design of a typical dozer drive train is conducted applied the proposed new design method and calculation method. Major components of the power train are modeled using the simulation software Simulink. Based on power track control strategy, the simulation results show that the proposed new design method and parameter design theory of electric motors for hybrid construction equipments are reasonable. It has significance in both theory and practice for the research and development of hybrid electric drive construction equipments.
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Amrhein, W., S. Silber, K. Nenninger, G. Trauner, and R. Schöb. "Mechatronical Design Studies on Small Brushless Motors." International Journal of Rotating Machinery 9, no. 2 (2003): 127–33. http://dx.doi.org/10.1155/s1023621x03000113.

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Brushless DC- and AC-permanent-magnet motors controlled by powerful micro-controller electronics have opened up a significant share of the small motor market in the last years. Based on the mechanical low cost construction of single-phase motor the paper presents electronic drive concepts to improve the performance and for special applications also the lifetime of brushless motors. The tangential and radial forces acting on the rotor are controlled by special phase current curves to reduce the torque ripple and to avoid expendable machinery parts like ball or sliding bearings.
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Trazzi, P. E. "DESIGN AND DEVELOPMENT OF A 70 N THRUST CLASS TURBOJET ENGINE." Revista de Engenharia Térmica 3, no. 1 (June 30, 2004): 09. http://dx.doi.org/10.5380/reterm.v3i1.3484.

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Small turbojet engines are being used for propulsion of radio-controlled model airplanes. The design and development of the model 505 small jet engine are reviewed. Small size gas turbines present special design and construction difficulties, some of which are addressed; design choices leading to the final configuration are discussed. Aero-thermodynamic aspects are covered along with experimental data when available. The unit is comprised of a radial compressor, an annular combustion chamber, and an axial turbine plus accessories; details on these components and on production aspects are presented.
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Kuzmin, Yury Viktorovich. "Development of designs of four-seat airplanes in the XX century." Историческая информатика, no. 3 (March 2022): 56–80. http://dx.doi.org/10.7256/2585-7797.2022.3.38633.

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The work is devoted to the analysis of a specific sub-branch of airplane construction and, at the same time, to the search of general laws of technology development. For the first time, a global picture of the development of designs of four-seat airplanes in the XX century is given, priority designs are identified. It is shown that the development of four-seat airplanes goes through two stages: the search (until the end of the 1940s), when popular airplane schemes periodically replaced each other, the airplane characteristics varied greatly, and the second stage of mature technology. In the second half of the XX century, both the qualitative and quantitative characteristics of four-seat airplanes remain almost constant and attempts to improve them did not lead to an increase in demand. The change of technology generations was replaced by coexistence, when each type of construction worked out during the previous period found its market niche. The division of phases, the transition from generation’s change to their coexistence, is clearly visible when analyzing both qualitative and quantitative data of airplanes. A paradoxical reaction of aircraft manufacturers to the decline in sales was found, expressed in increased design activity and an attempt to offer products with better technical characteristics. The inefficiency of such a reaction was shown. It is revealed that, contrary to widespread opinion, the change of technological solutions in production is faster than in development. As a result, most of the market is captured not by pioneers and not by retrogrades, but by followers – those who use modern, but already tested technologies in their products. At the same time, attempts to create and offer aircraft to consumers in a methodology that is no longer in demand have persisted unsuccessfully for decades.
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Bordianu, Adelina, and Gheorghe Samoilescu. "Analysis of Materials Used in the Construction of Electric Motors." International conference KNOWLEDGE-BASED ORGANIZATION 25, no. 3 (June 1, 2019): 19–24. http://dx.doi.org/10.2478/kbo-2019-0111.

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Abstract The paper presents the evolution of electric motors from the point of view of the materials used. Magnetic materials and composite materials, which are used in the construction of electrical machines, are analysed. Composite materials based on magnetic materials have a large coercive field, a wider hysteresis cycle, they cannot be easily demagnetized and they absorb better the vibration energy - therefore the noise is reduced. In the design of electric machines, the aim is to obtain a higher magnetic permeability across the frequency spectrum and to reduce the losses in iron and copper. We analysed the radial electric motors with cylindrical magnets, electric motors in discoidal form with axial field and motors with magnets with transverse flux. Hard magnetic materials were presented and the advantage of their use was highlighted - they retain a significant residual magnetization which translates into a significant saturation magnetization. The synthesis of Fe nanoparticles is performed and the composite materials obtained from iron powders with organic or inorganic binders are analysed with the purpose of reducing iron losses in electric motors.
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Mancilla-Cerezo, Josué, Ana Cristina Palacios-García, Rafael Tovany-León, Ricardo Jesús Rocha-Morles, Jorge Luis Flores-Benitez, Efraín Cotto-Jiménez, and Manuel González Pérez. "Design and Construction of an Educational Rover-type CanSat Picosatellite, Applying the “V” Methodology." International Journal of Advanced Engineering and Management Research 07, no. 03 (2022): 60–70. http://dx.doi.org/10.51505/ijaemr.2022.7306.

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Several years have passed since the CanSat concept was first proposed as an educational tool to teach space technology. This concept brought with it different applications such as a mobile system. This article presents the design and construction of such a system. The mission consisted of sending data via telemetry to a ground station (laptop) and returning to the starting point. This mission was carried out utilizing a rover-type vehicle, using the “v” methodology. The electronic cards and the mechanical parts that would make up the rover-type vehicle were designed. The electronic cards were built for their manufacture, and the mechanical parts were printed on a 3D printer. A rover-type CanSat capable of sending data through telemetry to a ground station (laptop) located 1 km away was built. In conclusion, the data transmission was received and traced by the ground station. A solution is presented with the rotation of the casing incorporating some vials to the motors. In the case of DC motors, it is recommended to place encoders to maintain the same speed as both motors.
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da Rocha Queiroz, Juliano, Anacreone da Silva Souza, Maurício Klein Gussoli, Júlio César Dainezi de Oliveira, and Cid Marcos Gonçalves Andrade. "Construction and Automation of a Microcontrolled Solar Tracker." Processes 8, no. 10 (October 19, 2020): 1309. http://dx.doi.org/10.3390/pr8101309.

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A solar tracker can be defined as an electromechanical system capable of following the apparent path of the Sun, in order to orient an array of solar panels and/or collectors directly to the solar rays, maximizing the collected energy. Accordingly, the present work describes the process of building and automating a micro-controlled solar tracker. Two mobile structures were built, one equipped with high-precision step motors and four luminosity sensors separated in quadrants by a cross structure, and the other equipped with DC motors and the 275 Wp solar panel, allowing the design and evaluation of the behavior of each structure separately. The control and automation system is centralized in an Arduino MEGA2560 microcontroller, which runs the tracking and positioning algorithms. The built prototype allows us to carry out studies of solar tracking strategies based on sensor and control systems applied to DC motors.
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Dissertations / Theses on the topic "Airplanes – Motors – Design and construction"

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Cranstone, Alexander William. "Low pressure turbine design for a future high bypass ratio aero-engine." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610530.

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Kay, Jacob. "Control authority assessment in aircraft conceptual design." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-03242009-040703/.

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Cabrera, Antonio Trani. "Combat aircraft scenario tradeoff models for conceptual design evaluation." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53920.

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The purpose of this research is to apply engineering-based knowledge to the field of combat aircraft survivability, and to create scenario-specific models in order to estimate the tradeoff between aircraft survivability and lethality metrics at the encounter and sortie levels. The development of scenario-specific models serves to identify and quantify technological changes that have Ieverage on the overall performance of the aircraft from a survivability point of view. Also, the models focus on the fighter aircraft susceptibility assessment and are capable of incorporating outputs from offline studies as inputs, such as in the area of vulnerability assessment where extensive databases are available. The mission scenario models are microscopic in nature and relate important conceptual aircraft design parameters such as thrust-to-mass ratio, wing loading, empty mass, maneuverability, etc. and operational parameters (e.g., weapon payload, range, loiter time, flight profiles, etc.) to the aircraft sortie survivability and lethality under various threat scenarios. This research proposes a methodology to estimate survivability and lethality aircraft performance at the sortie level where aircraft parameters can be implemented into scenario-specific models to assess their impact upon survivability-related metrics. While the project was conceived with naval aircraft in mind, the methodology, to the extent possible, is not to be aircraft-specific and thus could be applied to any particular design at the conceptual stage.
Ph. D.
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Martin, Benjamin C. "Geometric Design Optimization of Brushless Permanent Magnet Motors." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/MartinBC2009.pdf.

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Jimeno, Jesus. "A physics based robust methodology for aerodynamic design analysis and optimization." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/12472.

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Scharl, Julien. "Formulation and implementation of a methodology for dynamic modeling and simulation in early aerospace design." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/12973.

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Ellwood, Jeffrey L. "Design and construction of a composite airframe for UAV research." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA232422.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, June 1990.
Thesis Advisor(s): Howard, Richard M. Second Reader: Lindsey, Gerald H. "June 1990." Description based on signature page as viewed on October 21, 2009. DTIC Identifier(s): Composite materials, ducted fan, airframes, vertical takeoff aircraft, remotely piloted vehicles. Author(s) subject terms: UAV, composites, AROD, TDF, RPV, ducted fan, vertical takeoff. Includes bibliographical references (p. 74-75). Also available online.
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Grieshaber, Michele Marie. "Interactive calculation of cross-sectional areas for aircraft design and analysis." Thesis, This resource online, 1988. http://scholar.lib.vt.edu/theses/available/etd-04272010-020357/.

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Yu, Chuang, and 余创. "Design, analysis and control of flux-mnemonic permanent magnet brushless machines." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44769027.

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Rohl, Peter Jurgen. "A multilevel decomposition procedure for the preliminary wing design of a high-speed civil transport aircraft." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/11827.

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Books on the topic "Airplanes – Motors – Design and construction"

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B, Murthy S. N., Paynter Gerald C, American Institute of Aeronautics and Astronautics., and AIAA Aerospace Sciences Meeting (22nd : 1984 : Reno, Nev.), eds. Numerical methods for engine-airframe integration. New York, N.Y: American Institute of Aeronautics and Astronautics, 1986.

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I͡Ugov, Oleg Kirillovich. Osnovy integrat͡sii samoleta i dvigateli͡a. Moskva: "Mashinostroenie", 1989.

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Bill, Gunston. The development of piston aero engines: From the Wrights to microlights: a century of evolution and still a power to be reckoned with. Somerset: Patrick Stephens Limited, 1995.

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Bill, Gunston. The development of piston aero engines: From the Wrights to microlights : a century of evolution and still a power to be reckoned with. 2nd ed. Sparkford, Nr Yeovil, Somerset, England: Patrick Stephens Limited, 1999.

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Bill, Gunston. The development of jet and turbine engines. Sparkford, Somerset: Patrick Stephens, 1995.

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Boles, Michael A. Theoretical evaluation of engine auxiliary inlet design for supersonic V/STOL aircraft. Raleigh, N.C: Dept. of Mechanical and Aerospace Engineering, North Carolina State University, 1988.

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Boles, Michael A. Theoretical evaluation of engine auxiliary inlet design for supersonic V/STOL aircraft. Raleigh, N.C: North Carolina State University, 1991.

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Model four-stroke engines: A complete guide to the history, design, development, and operation of model four-stroke-cycle engines, including an appendix with specifications, performance data, and installation drawings. Wilton, CT: Air Age, 1986.

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Ḥayimovits, Menaḥem. Model roṭor meshupar ṿe-shimusho le-simulatsyah shel masoḳ ḳerav mitḳadem. Ḥefah: ha-Merkaz le-meḥḳar aṿironoṭi, ha-Faḳulṭah le-handasah aṿironoṭit ṿe-ḥalal, ha-Tekhniyon, 1991.

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Farokhi, Saeed. Aircraft propulsion. Hoboken, NJ: John Wiley & Sons, 2009.

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Book chapters on the topic "Airplanes – Motors – Design and construction"

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Culbert, Ian. "Design, Construction, and Manufacture of Squirrel Cage Rotors." In Current Signature Analysis for Condition Monitoring of Cage Induction Motors, 39–54. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119175476.ch2.

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Daher, Georges, Stéphane Régnier, and Sinan Haliyo. "A Rotary Induction Actuator for Kinesthetic and Tactile Rendering." In Haptics: Science, Technology, Applications, 155–63. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06249-0_18.

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AbstractActuators with low inertia and high bandwidth are of great interest for haptic devices, as they improve the quality of force rendering and transparency. This paper describes, as a proof of concept, a new design in rotary induction motors, the Axial-DSIM (Axial Double-Sided Induction Motor). This motor has a simple design construction that consists of a thin and lightweight disc-shaped moving secondary (rotor) surrounded by fixed primaries on both sides that generate a rotating magnetic field that induces a force on the disc. The low inertia of this motor and its principle of operation make it possible to render high-fidelity torques with high dynamics.
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"Design, Simulation and Construction of Two Synchronized DC Motors' Driver for EVs." In International Conference on Mechanical and Electrical Technology 2009 (ICMET 2009), 257–65. ASME Press, 2009. http://dx.doi.org/10.1115/1.802946.paper42.

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Pool, Robert. "Complexity." In Beyond Engineering. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195107722.003.0009.

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Things used to be so simple. In the old days, a thousand generations ago or so, human technology wasn’t much more complicated than the twigs stripped of leaves that some chimpanzees use to fish in anthills. A large bone for a club, a pointed stick for digging, a sharp rock to scrape animal skins—such were mankind’s only tools for most of its history. Even after the appearance of more sophisticated, multipiece devices—the bow and arrow, the potter’s wheel, the ox-drawn cart—nothing was difficult to understand or decipher. The logic of a tool was clear upon inspection, or perhaps after a little experimentation. No longer. No single person can comprehend the entire workings of, say, a Boeing 747. Not its pilot, not its maintenance chief, not any of the thousands of engineers who worked upon its design. The aircraft contains six million individual parts assembled into hundreds of components and systems, each with a role to play in getting the 165-ton behemoth from Singapore to San Francisco or Sidney to Saskatoon. There are structural components such as the wings and the six sections that are joined together to form the fuselage. There are the four 21,000-horsepower Pratt & Whitney engines. The landing gear. The radar and navigation systems. The instrumentation and controls. The maintenance computers. The fire-fighting system. The emergency oxygen in case the cabin loses pressure. Understanding how and why just one subassembly works demands years of study, and even so, the comprehension never seems as palpable, as tangible, as real as the feel for flight one gets by building a few hundred paper airplanes and launching them across the schoolyard. Such complexity makes modern technology fundamentally different from anything that has gone before. Large, complex systems such as commercial airliners and nuclear power plants require large, complex organizations for their design, construction, and operation. This opens up the technology to a variety of social and organizational influences, such as the business factors described in chapter 3. More importantly, complex systems are not completely predictable.
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Morrow, Gary W. "Organic Synthesis in the Laboratory." In Bioorganic Synthesis. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780199860531.003.0011.

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The German chemist Friedrich Wöhler is generally credited with the first laboratory synthesis of a known organic compound (urea) from inorganic materials. He accomplished this by the simple heating of an inorganic salt, ammonium cyanate (NH4OCN). “I must tell you,” he wrote to his mentor Jöns Jakob Berzelius in 1828, “that I can prepare urea without requiring a kidney of an animal, either man or dog.” While this report may seem relatively minor given the structural simplicity of urea, its impact was revolutionary. For the first time, the preparation and isolation of an organic compound had been achieved in the absence of the elemental “vital force” of living systems previously believed to be required for the construction of all such compounds. This milestone of 19th century organic chemistry was later followed by many others, including Kolbe’s synthesis of acetic acid in 1847 and Fischer’s synthesis of glucose in 1890. With the support of evolving methods for compound separation, purification, and spectroscopic analysis, rapid advances in the sophistication of organic synthesis followed throughout the 20th century, developing in tandem with an ever-deepening understanding of the underlying organic processes associated with living systems. While it is certainly true that syntheses of many structurally complex unnatural compounds of theoretical interest are also among the most remarkable achievements in synthetic strategy, tactical execution, and perseverance, the realm of natural products remains the dominant source for the most challenging and potentially beneficial targets available for such synthetic efforts. Figure 8.1 shows a small selection of some natural (and unnatural) products which have been produced via synthesis over the years, from Wöhler’s time to the present. Note the increasing levels of structural sophistication and stereochemical complexity that have eventually been mastered by practitioners of organic synthesis. In our own time, the traditional boundaries between organic and biological chemistry are disappearing in ways that are likely to transform the design and synthesis of organic molecules, from the construction of synthetic biologicals designed to act as biomarkers, biosensors, or drug delivery agents, to the development of molecular motors, self-replicating macromolecular systems, and even synthetic life forms.
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Conference papers on the topic "Airplanes – Motors – Design and construction"

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Al'Akayshee, Q. "Design, construction and testing of canned motors." In Second IEE International Conference on Power Electronics, Machines and Drives. IEE, 2004. http://dx.doi.org/10.1049/cp:20040278.

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Parry, G. E. "Design and construction to achieve low starting currents on hazardous area motors." In IEE Colloquium on Machines in Hazardous Areas. IEE, 1997. http://dx.doi.org/10.1049/ic:19970320.

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Miča, Pavol, and Jozef Čerňan. "Wing magnetohydrodynamic facility of aircraft propulsion system." In Práce a štúdie. University of Zilina, 2021. http://dx.doi.org/10.26552/pas.z.2021.2.27.

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Magnetohydrodynamics is one of the relatively new fields of physics studying the dynamics of magnetic fields in electrically conductive fluids. The implementation using magnetohydrodynamic principles applied to aircraft propulsion systems is so far only in a range of experiments. So far, real applications have occurred only a few times and always only at the level of experiments and prototypes. In my paper, I deal with the application of a magnetohydrodynamic device built into the wing of an airplane. This means should work as a secondary type of drive in cooperation with the primary drive, which is represented by a turbofan motor. The device´s main function is to reduce the fuel requirements of the primary drive and reduce noise and other harmful emissions. The work also includes drawings created in the program AutoCAD, where I designed the location and implementation of a wing magnetohydrodynamic device in the wing of general construction. In this work, I also explore the advantages and disadvantages of using different tips of the primary drive. I am also researching the current state of the problem where I am analyzing the Japanese project of the YAMATO-1 semi-catamaran with magnetohydronymous propulsion and a prototype of an ion-powered crawler from IMT scientists. I also examine in detail all the theoretical knowledge concerning magnetohydrodynamics and wing design. Finally, I compare the advantages and disadvantages of using this tool as well as other technical issues related to construction. This work can serve as a basis for further future research into the application of magnetohydrodynamic principles in aviation
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Kazerooni, H., and S. Kim. "Design and Construction of a Statically-Balanced Direct Drive ARM." In ASME 1987 Design Technology Conferences. American Society of Mechanical Engineers, 1987. http://dx.doi.org/10.1115/detc1987-0058.

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Abstract A statically-balanced direct drive robot manipulator is being constructed at the University of Minnesota for analysis of manufacturing tasks such as deburrlng and grinding when Impedance Control (8, 10, 11) is used to control the robot. This mechanism using a four bar linkage is designed without extra counterweights. As a result of elimination of the gravity forces on the drive system, smaller actuators (and consequently smaller amplifiers) are chosen to guarantee the acceleration of about 5g without overheating the motors. This mechanism results in closed-form solution for Inverse kinematics. The closed-form solutions for dynamic and Inverse kinematic have been derived. High torque, low speed brush-less AC synchronous motors are used to power the robot. The relatively “large” workspace of this configuration is suitable for manufacturing tasks. Graphite epoxy composite material is being used for the construction of the robot links.
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Suzuki, Isao, Shinichi Noda, Kazunobu Itomi, and Fuminori Ishibashi. "Natural Frequencies of Stator in Induction Motors." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-4049.

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Abstract Totally enclosed induction motors in which the stator core is pressed in the frame are in general used in industrial machines and manufactured with similar construction around the world. These motors produce a strong electromagnetic noise, which is caused by resonance between the natural frequencies of the stator core and the harmonics of electromagnetic forces. Therefore, it is very important to estimate its natural frequencies at the stage of design. As the first stage of research to estimate the natural frequencies of the stator core pressed into the motor frame, the dual rings were chosen as the object of studies. They are similar to the motor in construction and are easy to use to solve the problems. The purpose of this study is to investigate the effects of the tight fit to the natural frequencies and to find an analytical method by FEM. The authors have found that the introduction of spring elements with radial and circumferential spring constants at the contact surfaces provides accurate calculated results of the natural frequency by FEM. This paper describes about the spring constants obtained from experiments and analysis. As a result, when the spring constants in the radial direction are infinite and those in the circumferential direction are variable, it is clear that the spring constants for natural frequency analysis by FEM were expressed as a function of contact pressure on the contact surfaces. In the second stage, the measurement and calculation of natural frequency in the actual stator core with a frame was performed, and these results showed good agreement. These spring constants will be useful in FEM analysis of stator cores pressed into cylindrical induction motor frames.
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6

Kuzmin, Yu. "Аircraft design schools as actors in the history of technology. On the example of the statistical analysis of the world aircraft construction school." In Historical research in the context of data science: Information resources, analytical methods and digital technologies. LLC MAKS Press, 2020. http://dx.doi.org/10.29003/m1790.978-5-317-06529-4/64-70.

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The design schools in airplane manufacturing are considered. For decades, these social structures retain their own features, manifesting in the specifics of the created airplanes. As a result, the variability in R&D intensity, measured as the frequency of new designs appearing, is much less than the variability in output. It is shown for the first time that variations in the distribution of R&D across countries are also much smaller than variations in output. This indicates the difficulty of creating design schools and the necessity to maintain them carefully.
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7

Kuzmin, Yu. "Аircraft design schools as actors in the history of technology. On the example of the statistical analysis of the world aircraft construction school." In Historical research in the context of data science: Information resources, analytical methods and digital technologies. LLC MAKS Press, 2020. http://dx.doi.org/10.29003/m1790.978-5-317-06529-4/64-70.

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The design schools in airplane manufacturing are considered. For decades, these social structures retain their own features, manifesting in the specifics of the created airplanes. As a result, the variability in R&D intensity, measured as the frequency of new designs appearing, is much less than the variability in output. It is shown for the first time that variations in the distribution of R&D across countries are also much smaller than variations in output. This indicates the difficulty of creating design schools and the necessity to maintain them carefully.
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8

Giberti, Hermes, and Simone Cinquemani. "The Specific Accelerating Factor to Compare Brushless Motors." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82547.

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This work is focused on the analysis of the parameter named “accelerating factor” and on its use in choosing the correct electric brushless motor and gearbox in automation field. The “accelerating factor” is analyzed from a phenomenological point of view, analyzing data available on catalogs of motor manufacturers, and from the point of view of the design of such devices, trying to find a relationship between the accelerating factor and the construction parameters of a brushless motor. The result achieved in this paper is the definition of a specific value of the accelerating factor allowing a better comparison between different motors and helping the designer in the choice of the best motor for a given application.
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Chidambaram, Bala, and Alice M. Agogino. "Function-Costing Applied to Brushless D.C. Permanent Magnet Motors." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dac-3764.

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Abstract Function-costing is a cost-estimation hypothesis that helps designers estimate costs from a product’s specifications. It is surmised, that for a class of products, the relationship between cost and the primary function can be captured in a mathematical relation. It proceeds on the basis that in a free market, the lowest cost of a product will emerge over time and this cost can be roughly approximated from the product’s primary performance function. In this paper, we validate the function-costing hypothesis for Brushless D.C. permanent magnet motors (BDCPMMs). The principal function of these motors is to provide torque and the peak torque is chosen as the primary performance function. From the cost-peak torque data of a family of eight BDCPMMs produced by a motor manufacturer, we obtain a regression-based cost-estimation relation based on the function-costing hypothesis. The manufacturing processes involved in the BDCPMM construction are studied. A detailed cost-estimation function — in terms of the BDCPMM design variables — is developed using the principle of similarity and the cost data from the eight motors. The costs of constructing a motor for different peak torques is then obtained from a nonlinear discrete optimization formulation (minimum cost objective), which is solved using a genetic algorithm. These costs compare well with the costs predicted by function-costing and validate the hypothesis for BDCPMMs. Finally, we investigate potential applications of function-costing to BDCPMM redesign.
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Lubják, Peter, and Jozef Čerňan. "Construction design of a three-cylinder two-stroke radial engine." In Práce a štúdie. University of Žilina, 2022. http://dx.doi.org/10.26552/pas.z.2022.1.15.

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The goal of modern society is to improve efficiency in all areas. Our goal is to convert the old engine parts into a functional power unit that is more efficient than the donor parts. Modern electric motors with high efficiency are our main competitors, but our motor has an advantage in a simple design that is easily serviced. We achieve low weight by using lightweight aluminum air-cooled cylinders. In my work, I deal with the fundamentals of two- and four-stroke internal combustion engines. The importance of primary and secondary forces caused by the movement of the crankshaft and pistons is also discussed. Of course, we'll go over how to fill the engine while it's running (carburetor/injection). Following that, I'd like to go over the overall functionality of the drive unit as well as the significance of specific components. In practice, we concentrate on simulating our experimental engine. The purpose of this entire article is to provide the foundational documentation for the subsequent construction of this power unit.
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