Relevant bibliographies by topics / Passive levitation

Academic literature on the topic 'Passive levitation'

Author: Grafiati
Published: 14 March 2023

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Journal articles on the topic "Passive levitation"

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Kim, Chang Hyun, Ki Jung Kim, Younghak Lee, Hyung Suk Han, and Doh Young Park. "Dynamic Simulation of Discontinuously Arranged Electromagnets for Passive Tray Levitation." Applied Mechanics and Materials 278-280 (January 2013): 341–44. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.341.

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For a highly clean vacuum environment, magnetic levitation is plausible technology because of its noncontact nature. Especially, due to the potential occurrence of an electric spark in spite of low voltage in a vacuum a passive tray without any circuits is required. In consideration of spatial limitation and cost reduction, the electromagnets of the passive tray levitation should be located discontinuously. This paper presents the characteristic analysis of the passive tray levitation system according to an interval of discontinuously arranged electromagnets. For doing this, the 3D dynamic model, which consists of the mechanical components, joints, and force elements, is proposed to predict the levitation stability.
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Romero, L. A. "Passive Levitation in Alternating Magnetic Fields." SIAM Journal on Applied Mathematics 63, no. 6 (January 2003): 2155–75. http://dx.doi.org/10.1137/s003613990241031x.

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Sun, R. X., J. Zheng, L. J. Zhan, S. Y. Huang, H. T. Li, and Z. G. Deng. "Design and fabrication of a hybrid maglev model employing PML and SML." International Journal of Modern Physics B 31, no. 25 (October 10, 2017): 1745014. http://dx.doi.org/10.1142/s021797921745014x.

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A hybrid maglev model combining permanent magnet levitation (PML) and superconducting magnetic levitation (SML) was designed and fabricated to explore a heavy-load levitation system advancing in passive stability and simple structure. In this system, the PML was designed to levitate the load, and the SML was introduced to guarantee the stability. In order to realize different working gaps of the two maglev components, linear bearings were applied to connect the PML layer (for load) and the SML layer (for stability) of the hybrid maglev model. Experimental results indicate that the hybrid maglev model possesses excellent advantages of heavy-load ability and passive stability at the same time. This work presents a possible way to realize a heavy-load passive maglev concept.
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Bachovchin, Kevin D., James F. Hoburg, and Richard F. Post. "Stable Levitation of a Passive Magnetic Bearing." IEEE Transactions on Magnetics 49, no. 1 (January 2013): 609–17. http://dx.doi.org/10.1109/tmag.2012.2209123.

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Bassani, Roberto. "Levitation of passive magnetic bearings and systems." Tribology International 39, no. 9 (September 2006): 963–70. http://dx.doi.org/10.1016/j.triboint.2005.10.003.

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Bassani, Roberto. "Earnshaw (1805–1888) and Passive Magnetic Levitation." Meccanica 41, no. 4 (August 2006): 375–89. http://dx.doi.org/10.1007/s11012-005-4503-x.

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Xu, Xiao Zhuo, Xiao Feng Qin, and Xu Dong Wang. "Characteristics Analysis of a Novel Detent-Force-Based Magnetic Suspension System." Advanced Materials Research 383-390 (November 2011): 2644–48. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.2644.

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A novel Detent-force-based Magnetic Suspension System (DMSS) is presented. The topological structure and operating principle of DMSS are analyzed. The characteristics of the axial, radial force and magnetic field and torsion moment are studied with FEA method respectively. Simulation results show that the DMSS can generate larger levitation force than common levitation systems, and its levitation mode is a passive suspension in the axial direction and torsion without external control.
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Lee, Ji-Hoon, Yun-Joo Nam, and Myeong-Kwan Park. "Magnetic Fluid Actuator Based on Passive Levitation Phenomenon." Journal of Intelligent Material Systems and Structures 22, no. 3 (February 2011): 283–90. http://dx.doi.org/10.1177/1045389x11399487.

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Feng, Lin, Shengyuan Zhang, Yonggang Jiang, Deyuan Zhang, and Fumihito Arai. "Microrobot with passive diamagnetic levitation for microparticle manipulations." Journal of Applied Physics 122, no. 24 (December 28, 2017): 243901. http://dx.doi.org/10.1063/1.5005032.

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Detoni, JG. "Progress on electrodynamic passive magnetic bearings for rotor levitation." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 10 (November 17, 2013): 1829–44. http://dx.doi.org/10.1177/0954406213511798.

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Electrodynamic suspension exploits repulsive forces due to eddy currents to produce positive stiffness by passive means, without violating the Earnshaw stability criterion. Systems employing this principle to levitate a rotor radial and/or axial degrees of freedom are called electrodynamic bearings (EDBs). Since the eddy currents can be induced either by using alternating current supplied electromagnets or by the relative motion between a conductor and a constant magnetic field, the research on EDBs has developed many different configurations. The present paper reviews the literature on electrodynamic passive magnetic bearings to analyze the evolution of this technology toward completely passive, stable, rotor levitation, and to compare the EDBs performance with other common magnetic bearing technologies. Radial and axial EDB technologies are reviewed attempting to create an organized connection between the works and to discuss some critical issues that still preclude the use of EDBs in industrial applications.
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Dissertations / Theses on the topic "Passive levitation"

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Siyambalapitiya, Chamila Shyamalee. "Model and Validation of Static and Dynamic Behavior of Passive Diamagnetic Levitation for Energy Harvesting." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4406.

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This dissertation reports the investigation conducted on the static and dynamic behavior of the passive diamagnetic levitation systems. Attachment of a device to a substrate hinders the optimum performance ability of vibrating devices by altering the dynamic behavior of the moving part whilst introducing higher overall stiffness. The significance of this effect is prominent especially in vibration based energy harvesters as higher stiffness elevates the resonance frequency of the system, making it difficult to tune into ambient low frequencies. Other advantages of the proposed method are given by the removal of mechanical bending elements, which are often the source of energy dissipation through thermo-elastic damping and affects device reliability and durability. In this research, diamagnetically levitated resonators that can be utilized in energy harvesting were proposed and investigated as a possible solution to overcome these problems. Permanent magnets in an opposite neighboring poles (ONP) configuration were used to provide the magnetic field required for levitation. Pyrolytic graphite (PG), which is the known highest diamagnetic material, serves as the levitating proof mass. Experimental results show that the static levitation height has a linear dependence on the thickness and a nonlinear dependence on the area of the levitating proof mass that can be approximated to a third order polynomial equation. Also, the study proved that a thinner proof mass provides a higher air gap while length of the proof mass beyond a certain value (l >10 mm for the experimental system considered in this dissertation) has no significant effect on increasing the air gap. It was also observed that levitation can slightly increase by attaching magnets to a sheet of steel (ferromagnetic material). To the best of my knowledge, this dissertation is the first to address the parameterized studies in the dynamics of diamagnetic levitated objects by permanent magnets. Measurements performed on a diamagnetic levitating prototype system show that the resonance frequencies are lowered by approximately 3- 4 orders of magnitude in levitated systems compared to the attached systems demonstrating the feasibility of using levitating techniques for micro to meso scale energy harvester applications. Also, there is a significant dissimilarity observed in this study compared to the mechanically attached systems: The resonance frequency has a dependence on magnetic field strength, and is shifting towards lower values when increasing the strength of the magnetic field. This indicates that the virtual spring of a levitated proof mass is not a constant and therefore, the resonance frequency of the diamagnetic levitated systems is able to be fine-tuned by varying the magnetic field. Finite Element Method (FEM) models were developed using COMSOL software that can simulate 3D magnetic flux formation of an array of permanent magnets and the diamagnetic levitation. The appropriate magnetic force equation from the two force equations that exist in the literature was established for the static levitation with the help of experimental and simulation results. Moreover, these models are able to provide the magnetic force exerted on diamagnetic objects at different heights, stable levitation height and position and also an indication of the maximum stably levitated size of the diamagnetic material. Future endeavor of this study is to realize the diamagnetic levitation in energy harvesters. The results obtained from this research will not be limited to harvester applications but will also be beneficial to other diamagnetic levitation related systems, as these parameters are fundamental and necessary for the foundation of the research in the field of interest.
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Billot, Margot. "Etude et développement d'un capteur de microforce pour la caractérisation de la nanofriction multi-aspérités en micromanipulation dextre." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2005/document.

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L’objectif de cette thèse est le développement d’un nouveau capteur de forcemulti-axes destiné à mesurer les composantes de friction impliquées dans lecontact doigt/objet lors la micromanipulation dextre. Des études théoriques etdes simulations par éléments finis ont conduit à la conception de ce capteurMEMS piézorésistif composé d’une plate-forme centrale munie d’une microbille,entourée d’une table compliante. D’après les résultats de simulations, ce capteur estcapable de mesurer indépendamment les forces normales et de frottement (couplageréciproque inférieure à 1%) avec une bonne sensibilité. Différents runs de fabricationnous ont permis d’obtenir des dispositifs exploitables. La structure mécanique de cescapteurs a été validée par la mesure des fréquences de résonance qui sont en accordavec les résultats de simulation. Des premiers résultats expérimentaux en termesde mesure de force ont ensuite été obtenus grâce au développement d’un banc detest (structure robotique, actionneurs, caméras, etc.). Nous nous sommes égalementintéressés à la problématique de l’étalonnage des capteurs de micro et nanoforceà l’aide de ressorts magnétiques reliés à des masses mesurables. Nous avons, danscette optique, mis au point une stratégie d’estimation et de compensation passivedes perturbations mécaniques en utilisant un principe différentiel. Cette approchea été appliquée à un capteur de nanoforce basé sur la lévitation diamagnétique et aabouti à des résultats prometteurs : une résolution inférieure au nanonewton a puêtre obtenue
Sensor enabling to characterize the finger/object contact involved in dexterousmicromanipulation. Theoretical studies and finite elements simulations have lead tothe conception of this piezoresistive MEMS sensor composed of a central platformwith a micro-ball and surrounded by a compliant table. According to the simulationresults, this sensor is able to independently measure the normal and friction forces(crosstalk less than 1 %) with a good sensitivity. Several runs of fabrication allowedus to obtain usable devices. The mechanical structure of such sensors has beenvalidated by the measurement of resonance frequencies that are consistent with thesimulation results. The first experimental results in terms of force measurement werethen obtained through the development of a test bench (robotic structure, actuators,cameras, etc.). We were also interested in the problem of calibration of micro andnanoforce sensors using magnetic springs connected to measurable masses. In thiscontext, we developed an estimation strategy and a passive rejection of mechanicaldisturbances using a differential principle. This approach was applied to a nanoforcesensor based on the diamagnetic levitation and yielded promising results: a resolutionlower the nanonewton level could be obtained
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Book chapters on the topic "Passive levitation"

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Bekinal, Siddappa Iranna, Tumkur Ramakrishna rao Anil, Sadanand Subhas Kulkarni, and Soumendu Jana. "Hybrid Permanent Magnet and Foil Bearing System for Complete Passive Levitation of Rotor." In Mechanisms and Machine Science, 939–49. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09918-7_83.

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Conference papers on the topic "Passive levitation"

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Kazadi, S., A. Li, A. An, B. Shen, and A. Pyun. "A levitating motor based on passive magnetic levitation supports." In 2015 IEEE 10th Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2015. http://dx.doi.org/10.1109/iciea.2015.7334450.

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Kim, Chang-Hyun, Changsun Ahn, Jin-Woo Park, and Doh Young Park. "Levitation and guidance control of passive magnetic levitation tray system." In 2013 44th International Symposium on Robotics (ISR). IEEE, 2013. http://dx.doi.org/10.1109/isr.2013.6695692.

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Chang-Hyun Kim, Jaewon Lim, Changsun Ahn, Jinwoo Park, and Doh Young Park. "Control design of passive magnetic levitation tray." In 2013 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2013. http://dx.doi.org/10.1109/icems.2013.6713215.

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Yurduseven, Okan, Ken Cooper, and Goutam Chattopadhyay. "Beam resolution analysis of a 340 GHz radar using acoustic levitation." In Passive and Active Millimeter-Wave Imaging XXII, edited by Duncan A. Robertson and David A. Wikner. SPIE, 2019. http://dx.doi.org/10.1117/12.2518727.

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Mizuno, Takeshi, Yusuke Hara, and Kenji Araki. "Control System Design of a Repulsive Magnetic Bearing Stabilized by the Motion Control of Permanent Magnets." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/movic-8413.

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Abstract The control system of a magnetic bearing system using forces of repulsion between permanent magnets was designed on a state-feedback basis. In the treated magnetic bearing, the radial motions of the rotor were passively supported by repulsive forces and the axial motion was stabilized by active control. Stabilization was achieved by using the motion control of the permanent magnets for passive radial suspension; these magnets were driven by voice coil motors in the axial direction. Experimental results showed that the designed controllers achieved contactless levitation and adjusted the levitation characteristics effectively by the assignment of closed-loop poles.
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Changsun Ahn, Chang-Hyun Kim, Jin-Woo Park, and Doh Young Park. "Controller parameter optimization for passive magnetic levitation tray using Taguchi method." In 2013 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2013. http://dx.doi.org/10.1109/icems.2013.6713212.

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Kim, Chang-Hyun, Chang-Wan Ha, Jaewon Lim, Jong-Min Lee, and Doh Young Park. "Sensor Offset Compensation for Improved Levitation Performance of Passive Maglev Transport System." In IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2019. http://dx.doi.org/10.1109/iecon.2019.8927792.

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Muscroft, R. J. M., D. B. Sims-Williams, and D. A. Cardwell. "The Development of a Passive Magnetic Levitation System for Wind Tunnel Models." In SAE 2006 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2006. http://dx.doi.org/10.4271/2006-01-0566.

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Shvartsburg, Alexandre. "Multishape solar sails - Passive achievement of the levitation and slow orbiting stability." In Space Programs and Technologies Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-4495.

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Ozawa, Yoshiki, Yusuke Fujii, Akira Chiba, Hiroya Sugimoto, Haruhiko Suzuki, and Hannes Bleuler. "Principles and Test Result of Novel Full Passive Magnetic Levitation Motor with Diamagnetic Disk." In 2021 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2021. http://dx.doi.org/10.1109/ecce47101.2021.9595636.

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Reports on the topic "Passive levitation"

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Post, R. F. Study of a new passive magnetic levitation concept. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/92225.

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