Relevant bibliographies by topics / Magnetic levitation; vibration isolation

Academic literature on the topic 'Magnetic levitation; vibration isolation'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Magnetic levitation; vibration isolation"

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Yalçın, Barış Can, Mert Sever, and Kadir Erkan. "Observer-based H2 controller design for a vibration isolation stage having hybrid electromagnets." Journal of Low Frequency Noise, Vibration and Active Control 37, no. 4 (July 10, 2018): 1134–50. http://dx.doi.org/10.1177/1461348418782170.

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Vibration isolation systems based on hybrid electromagnets, consisting of electromagnet and permanent magnet, have a potential usage in many industrial areas, such as clean room design, transportation, semiconductor manufacturing, suspension systems, and robotic surgery due to providing mechanical contact free vibration isolation. Using permanent magnets in the electromagnet structure has some crucial advantages, such as a minimized volume and a more compact structure. Furthermore, the essential force for levitation of vibration isolation stage can be generated by only the permanent magnet(s), which means, by using hybrid electromagnets, magnetic levitation can be achieved with considerably low energy consumption against possible vibrations. This property is called zero-power behavior. However, the main problems of magnetic levitation process are as follows: it has highly nonlinear nature even if it can be linearized; it has unstable pole(s), which makes the system vulnerable in terms of stability. In recent years, linear matrix inequality-based design of controllers has received considerable attention and become very popular due to their ability to satisfy multiobjective design requirements. However, an observer-based H2 controller design for a vibration isolation system having hybrid electromagnets has not been considered yet. Therefore, the linear matrix inequality-based controller is employed to minimize the effect of disturbances on the following objectives, such as vibration isolation, zero-power property, and protection of the levitation gap. The effectiveness of the proposed method is shown with the numerical simulation studies and compared with classical Linear Quadratic Regulator (LQR) approach.
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Kou, Baoquan, Yiheng Zhou, Xiaobao Yang, Feng Xing, and He Zhang. "Electromagnetic and Mechanical Characteristics Analysis of a Flat-Type Vertical-Gap Passive Magnetic Levitation Vibration Isolator." Shock and Vibration 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/5327207.

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In this paper, we describe a flat-type vertical-gap passive magnetic levitation vibration isolator (FVPMLVI) for active vibration isolation system (AVIS). A dual-stator scheme and a special stator magnet array are adopted in the proposed FVPMLVI, which has the effect of decreasing its natural frequency, and this enhances the vibration isolation capability of the FVPMLVI. The structure, operating principle, analytical model, and electromagnetic and mechanical characteristics of the FVPMLVI are investigated. The relationship between the force characteristics (levitation force, horizontal force, force ripple, and force density) and major structural parameters (width and thickness of stator and mover magnets) is analyzed by finite element method. The experiment result is in good agreement with the theoretical analysis.
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Tsuda, M., K. Tamashiro, S. Sasaki, T. Yagai, T. Hamajima, T. Yamada, and K. Yasui. "Vibration Transmission Characteristics Against Vertical Vibration in Magnetic Levitation Type HTS Seismic/Vibration Isolation Device." IEEE Transactions on Applied Superconductivity 19, no. 3 (June 2009): 2249–52. http://dx.doi.org/10.1109/tasc.2009.2019139.

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Wu, Qian Qian, Rong Qiang Liu, Hong Hao Yue, Zong Quan Deng, and Hong Wei Guo. "Design and Optimization of Magnetic Levitation Actuators for Active Vibration Isolation System." Advanced Materials Research 774-776 (September 2013): 168–71. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.168.

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Actuator based on Lorentz force exhibits excellent isolating performance with its non-contact characteristic, especially during frequency bandwidth below 5Hz. In this paper, mathematical model of the magnetic levitation actuator is constructed. In order to obtain better performance, parametric design of the structure of magnetic actuator is carried out and a multi-objective optimization method is proposed to maximize Lorentz force and minimize the mass of coil on the basis of genetic algorithm in the optimization process. A designing optimization program is developed, by which optimized parameters of magnetic actuator with maximal actuator force and minimal mass of coil can be identified to conduct experiment on ground. Compared with initial values in an instance, the optimized method is proven to be feasible and has the value of practical application.
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Li, Qiang, Shan Li, Fengxu Li, Dengfeng Xu, and Zhaoyun He. "Analysis and Experiment of Vibration Isolation Performance of a Magnetic Levitation Vibration Isolator with Rectangular Permanent Magnets." Journal of Vibration Engineering & Technologies 8, no. 5 (November 7, 2019): 751–60. http://dx.doi.org/10.1007/s42417-019-00188-z.

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Zhu, Tao, Benjamin Cazzolato, William S. P. Robertson, and Anthony Zander. "Vibration isolation using six degree-of-freedom quasi-zero stiffness magnetic levitation." Journal of Sound and Vibration 358 (December 2015): 48–73. http://dx.doi.org/10.1016/j.jsv.2015.07.013.

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NAGASAKI, Yoh, Gen KAMADA, Tomoki KATANA, Shuhei SASAKI, Daisuke MIYAGI, and Makoto TSUDA. "Horizontal Vibration Transmission Characteristics of a Magnetic Levitation Type Seismic Isolation Model Device with Stable Levitation System." TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 55, no. 2 (March 20, 2020): 117–24. http://dx.doi.org/10.2221/jcsj.55.117.

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van Casteren, D. T. E. H., K. J. W. Pluk, J. J. H. Paulides, and E. A. Lomonova. "Modeling the Effects of Magnetization Variations on a Permanent Magnet Based Levitation or Vibration Isolation System." Applied Mechanics and Materials 416-417 (September 2013): 366–72. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.366.

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When designing a magnetic levitation system it is assumed that the magnets are ideally magnetized. In practice, however, this is not the case and deviations occur in the magnetization. In this paper two types of deviations are considered, namely a constant angular deviation and the magnetization error. Calculations show that a constant error has larger impact on the performance of a gravity compensator than the magnetization error.
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Dong, Weihua, Mingda Zhai, and Xiaolong Li. "Analysis and Design of Magnetic Levitation and Mechanical Spring Compound Vibration Isolation Control System." IOP Conference Series: Materials Science and Engineering 631 (November 7, 2019): 032049. http://dx.doi.org/10.1088/1757-899x/631/3/032049.

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Nagaya, Kosuke, Masashi Ishikawa, and Nobuyuki Fujisawa. "Actuators for a Noncontact Magnetic Levitation Table and Its Application to Vibration Isolation Control." Transactions of the Japan Society of Mechanical Engineers Series C 61, no. 584 (1995): 1381–88. http://dx.doi.org/10.1299/kikaic.61.1381.

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Dissertations / Theses on the topic "Magnetic levitation; vibration isolation"

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井上, 剛志, Tsuyoshi INOUE, 幸男 石田, Yukio ISHIDA, 陽介 池田, and Yosuke IKEDA. "磁気浮上制御系の非線形強制振動 (調和共振の分岐現象と超調波共振の発生)." 日本機械学会, 2004. http://hdl.handle.net/2237/8978.

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Le, Toan T. "A Single-Stage Passive Vibration Isolation System for Scanning Tunneling Microscopy." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2272.

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Scanning Tunneling Microscopy (STM) uses quantum tunneling effect to study the surfaces of materials on an atomic scale. Since the probe of the microscope is on the order of nanometers away from the surface, the device is prone to noises due to vibrations from the surroundings. To minimize the random noises and floor vibrations, passive vibration isolation is a commonly used technique due to its low cost and simpler design compared to active vibration isolation, especially when the entire vibration isolation system (VIS) stays inside an Ultra High Vacuum (UHV) environment. This research aims to analyze and build a single-stage passive VIS for an STM. The VIS consists of a mass-spring system staying inside an aluminum hollow tube. The mass-spring system is comprised of a circular copper stage suspended by a combination of six extension springs, and the STM stays on top of the copper stage. Magnetic damping with neodymium magnets, which induces eddy currents in the copper conductor, is the primary damping method to reduce the vibrations transferred to the mass-spring system. FEMM and MATLAB® are used to model magnetic flux density and damping coefficients from eddy current effect, which will help determine the necessary damping ratios for the VIS. Viton, which demonstrates a high compatibility with vacuum environments, will also serve as a great damping material between joints and contacts for the housing tube. Viton will be modeled as a Mooney-Rivlin hyperelastic material whose material parameters are previous studied, and Abaqus will be used as a Finite Element Analysis software to study the Viton gaskets’ natural frequencies. The natural frequencies of the aluminum hollow tube will also be investigated through Abaqus.
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Abed, Issam. "Modélisation et optimisation d'un récupérateur d'énergie vibratoire électromagnétique non-linéaire multimodale." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2003/document.

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Afin d’accomplir les promesses des récupérateurs d’énergie vibratoire (VEHs) qui s’imposent comme unealternative majeure pour garantir l’autonomie des capteurs pour la surveillance, leurs performances en termes debande passante et puissance récupérable doivent être améliorées. Dans cette thèse, à la différence des VEHs classiqueslinéaires et multimodales ou non-linéaires et mono-fréquence, on propose une approche de récupérationd’énergie basée sur des réseaux d’aimants couplés en lévitation ou élastiquement guidés combinant les avantagesdes non-linéarités et des interactions modales. Une étude bibliographique sur les récupérateurs d’énergie vibratoireest effectuée. En particulier, les inconvénients des récupérateurs linéaires et les techniques de réglage de fréquencesont présentées. De plus, les méthodes non-linéaires sont présentées pour définir une procédure de résolution permettantl’étude de la dynamique des récupérateurs non-linéaires. Les équations du mouvement qui contiennentla non-linéarité magnétique, la non-linéarité géométrique et l’amortissement électromagnétique sont résolus enutilisant la méthode de la balance harmonique couplée avec la méthode asymptotique numérique. Une méthodologied’optimisation multi-objectif basée sur l’algorithme Non Sorting Genetic Algorithm est appliquée afin decalculer les solutions optimales pour maximiser les performances du récupérateur d’énergie. Grâce au couplagenon-linéaire et aux interactions modales, pour le cas des trois aimants couplés, l’approche proposée permet la récupérationde l’énergie vibratoire dans la gamme fréquentielle 4;6 - 14;5 Hz, avec une bande passante d’environ190 % et une puissance normalisée de 20,2 mWcm-3g-2
In order to accomplish the promises of vibration energy harvesters (VEHs) as a major alternative to powersensors, their performances in terms of frequency bandwidth and harvested power have to be improved. In thisthesis, unlike classical VEHs either linear and multimodal or nonlinear and mono-frequency, we propose a vibrationenergy harvesting approach based on arrays of coupled levitated or elastically guided magnets combining thebenefits of nonlinearities and modal interactions.A review of VEHs is carried out. Particularly, the design issues of linear harvesters are addressed and frequencytuning techniques are presented. A review of nonlinear methods is also presented in order to define a solving procedureenabling the investigation of the dynamics of nonlinear VEHs. The equations of motion which include themagnetic nonlinearity, the geometric nonlinearity and the electromagnetic damping are solved using the harmonicbalance method coupled with the asymptotic numerical method. A multi-objective optimization procedure isintroduced and performed using a non-dominated sorting genetic algorithm for the cases of small magnet arraysin order to select the optimal solutions in term of performances by bringing the eigenmodes close to each other interms of frequencies and amplitudes. Thanks to the nonlinear coupling and the modal interactions even for onlythree coupled magnets, the proposed method enable harvesting the vibration energy in the operating frequencyrange of 4.6–14.5 Hz, with a bandwidth of 190 % and a normalized power of 20:2mWcm-3g-2
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Robertson, William Samuel Parker. "Modelling and design of magnetic levitation systems for vibration isolation." Thesis, 2013. http://hdl.handle.net/2440/83826.

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Vibration disturbance has a consistent negative impact on equipment and processes. The central theme of this thesis is the investigation of using permanent magnets in the design of a system for vibration isolation. The thesis begins with a comprehensive literature review on the subjects of passive and active vibration isolation, permanent magnetic systems, and the common area between these on nonlinear vibration systems using magnetic forces. The use of cylindrical and cuboid magnets is the primary focus of this work for which analytical solutions are known for calculating forces and torques. Subsequently, the state of the art in analytical modelling of permanent magnet systems is covered, including a contribution in this area for calculating the forces between cylindrical magnets. A range of load bearing designs using simple permanent magnet arrangements are examined, with multiple designs suitable for a variety of objectives. A particular emphasis is placed on a system using inclined magnets, which can exhibit a load independent resonance frequency. Load bearing using multipole magnet arrays is also discussed, in which a large number of magnets are used to generate more complex magnetic fields. A variety of multipole arrays are compared against each other, including linear and planar magnetisation patterns, and an optimisation is performed on a linear array with some resulting guidelines for designing such systems for load bearing. Permanent magnet levitation requires either passive or active stabilisation; therefore, the design of electromagnetic actuators for active control is covered with a new efficient method for calculating the forces between a cylindrical magnet and a solenoid. The optimisation of a solenoid actuator is performed and geometric parameters are found which are near-optimal for a range of operating conditions. Two quasi–zero stiffness systems are introduced and analysed next. These systems are designed with a nonlinearity such that low stiffnesses are achieved while bearing large loads. The first system analysed is a purely mechanical device using linear springs; unlike most analyses of this design, the horizontal forces are also considered and it is shown that quasi–zero stiffness is capable in all translational directions simultaneously. However, a notable disadvantage of such spring systems is their difficulty in online tuning to adapt to changing operating conditions. A magnetic quasi–zero stiffness system is then analysed in detail and design criteria are introduced, providing a design framework for such systems and showing how the complex interaction of variables affects the resulting dynamic behaviour. Although the system is nonlinear, the effects of the nonlinearities on the vibration response are shown to be generally negligible. The thesis concludes with some experimental results of the same quasi–zero stiffness system, constructed as a single degree of freedom prototype. The quasistatic and dynamic behaviour of the system matches the theory well, and active vibration control is performed to improve the vibration isolation characteristics of the device.
Thesis (Ph.D.) -- University of Adelaide, School of Mechanical Engineering, 2013
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Zhu, Tao. "Six degree of freedom active vibration isolation using quasi-zero stiffness magnetic levitation." Thesis, 2014. http://hdl.handle.net/2440/85036.

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Vibration is recognised as one of the most significant disturbances to the operation of mechanical systems. Many traditional vibration isolator designs suffer from the trade-off between load capacity and isolation performance. Furthermore, in providing sufficient stiffness in the vertical direction to meet payload weight requirements, isolators are generally overly stiff in the remaining five degrees of freedom (DOF). In order to address the limitations of traditional isolator designs, this thesis details the development of a 6-DOF active vibration isolation approach. The proposed solution is based on a magnetic levitation system, which provides quasi-zero stiffness payload support in the vertical direction, and inherent zero stiffness in the other five DOFs. The introduced maglev isolator also allows the static force and moment inputs from the payload to be adaptive-passively balanced using permanent magnets. In this thesis, the theoretical background of the proposed maglev vibration isolation method is presented, which demonstrates the ability of the maglev system to achieve the intended vertical payload support and stiffness in the six degrees of freedom. Numerical models for calculating the forces and torques in the proposed maglev system are derived, and the analysis of the cross-coupling effects between the orthogonal DOFs of the isolator is also presented based on the developed system models. A mechanism is introduced by which the cross-coupling effects can be exploited to achieve load balancing for static inputs using permanent magnet forces alone. Following the development of the theoretical model, the mechanical design of the maglev isolator is presented. The designs of the various control systems that are necessary to enable the operation of the maglev isolator are explained. The presented control algorithms achieve three functions: stabilisation of the inherently unstable maglev system, adaptive-passive support of the payload using the cross-coupling effects introduced previously, and autonomous magnet position tuning for online system performance optimisation. Following the discussion of the controller design, a 6-DOF skyhook damping system is presented. The active damping system creates an artificial damping effect in the isolation system to reduce the vibration transmissibility around the resonance frequency of the system. The vibration transmissibilities of the developed maglev isolator were measured in 6-DOF, and results are presented for various combinations of controller settings and damping gains. Through comparisons between the measured performance of the physical system and the predicted performance from theory, the developed maglev vibration isolator demonstrated its practical ability to achieve high performance vibration isolation in six degrees of freedom.
Thesis (Ph.D.) -- University of Adelaide, School of Mechanical Engineering, 2014
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Kim, Young Ha. "Modeling and Vibration Control with a Nanopositioning Magnetic-Levitation System." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10353.

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This dissertation demonstrates that a magnetic-levitation (maglev) stage has the capabilities to control movements and reject vibration simultaneously. The mathematical model and vibration control scheme with a 6-degree-of-freedom (6-DOF) maglev stage for nanoscale positioning are developed for disturbance rejection. The derived full nonlinear dynamic equation of motions (EOMs) of the maglev stage include translational and rotational motions with differential kinematics. The derived EOMs and the magnetic forces are linearized to design a multivariable controller, a Linear Quadratic Gaussian with Loop Transfer Recovery (LQG/LTR), for vibration disturbance rejection in a multi-input multi-output (MIMO) system. For a more accurate model, the dynamics of an optical table with a pneumatic passive isolation system is also considered. The model of the maglev stage with the optical table is validated by experiments. Dual-loop controllers are designed to minimize the influence of the vibration disturbance between the moving platen and the optical table in the x-, y-, and z-axes motions. The inner-loop compensator regulates the velocity to reject vibration disturbance and the outer-loop compensator tracks positioning commands. When the vibration disturbances of 10 to 100 Hz are applied, the vibration-reduction ratios are about 30 to 65 percent in horizontal motion and 20 to 45 percent in vertical motion. In addition, the vibration disturbances of 45.45 Hz are attenuated by about 4 to 40 percent in angular motions. The vibration control schemes are effective in not only translational but rotational motions. In step responses, the vibration control schemes reduce the wandering range in the travel from the origin to another location. Positioning and tracking accuracies with the vibration controller are better than those without the vibration controller. In summary, these dual-loop control schemes with velocity feedback control improved the nanopositioning and vibration/disturbance rejection capabilities of a maglev system.
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Wang, Wei-chun, and 王煒群. "Developements of Magnetic Assist Vibration Isolation System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/18620098321481014120.

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碩士
國立中正大學
機械工程所
98
Design and Analysis of a vibration isolation system using negative stiffness with Electromagnetic force. The system focuses on developing a passive vibration isolation systems which can''t reduce the vibration when the system frequency is less than or equal to times the natural frequency. Using an external auxiliary of negative stiffness structure can reduce the stiffness of the system, related to the natural frequency can be reduced and increase the range of vibration isolation. The thesis adapts the electromagnetic force as a source of negative stiffness, and using the linear guide as the direction of designing. Through the magnetic circuit analysis theory to turn Magnetic circuit into equivalent electric circuit and combine the negative stiffness theory, the results prove the feasibility of the design. We design the experimental instruments by the Simplified model of linear guide, but using the compression spring replaced the linear guide on the designing, because the stiffness of linear guide is too high to observe its displacement. The results of experimental show that existence error between the experimental value and the theoretical value, because we made some of idealized assumptions when derived formula. But it also showed the feasibility of the design by the trend of the experimental value.
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Chang, Keng-Ning, and 張耿寧. "Development and Performance Study of a Magnetic Aerostatic Vibration Isolation Platform." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/97984084775380938713.

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碩士
國立臺灣大學
機械工程學研究所
99
This thesis presents the development of a magnetic aerostatic vibration isolation platform, which is integrated with electromagnetic and aerostatic bearing principles. For the aerostatic bearing, the concept of cap-shaped aerostatic bearing is applied to combine radial and axial bearings inside a cap-shaped air film to enhance its bearing capacity. The axial aerostatic bearing provides the supporting force of the vibration isolation platform, and the radial aerostatic bearing creates frictionless guide to increase its positioning accuracy. The electromagnetic coil is used to generate magnetic attractive force to counterbalance the axial aerostatic bearing force. Through this force counterbalance, not only the axial bearing stiffness can be minimized but also the axial position of the platform can be precisely controlled. For realizing axial positioning control, a hall element and a magnet are integrated to achieve non-contact displacement measurement with less loading effect. Besides, the classic PID control algorithm is the main core of the active positioning control. The finite element analysis and experiment are carried out to comprehend its electromagnetic and aerostatic effects; and the performances of the passive and the active vibration isolations are also experimentally verified
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Books on the topic "Magnetic levitation; vibration isolation"

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Rabinovich, B., A. I. Lebedev, and A. I. Mytarev. Vortex Processes and Solid Body Dynamics: The Dynamic Problems of Spacecrafts and Magnetic Levitation Systems (Fluid Mechanics and Its Applications). Springer, 2012.

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Book chapters on the topic "Magnetic levitation; vibration isolation"

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Kamaruzaman, Nur Afifah, William S. P. Robertson, Mergen H. Ghayesh, Benjamin S. Cazzolato, and Anthony C. Zander. "Vibration Isolation Performance of an LQR-Stabilised Planar Quasi-zero Stiffness Magnetic Levitation System." In Vibration Engineering for a Sustainable Future, 237–43. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-48153-7_31.

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Abed, I., N. Kacem, M. L. Bouazizi, and N. Bouhaddi. "Nonlinear 2-DOFs Vibration Energy Harvester Based on Magnetic Levitation." In Shock & Vibration, Aircraft/Aerospace, and Energy Harvesting, Volume 9, 39–45. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15233-2_5.

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Yin, Yifan, Maolin Sun, and Shiqiang Zheng. "Generalized Notch Filter for Rotor Modal Vibration Suppression of Magnetic Levitation Molecular Pump." In Lecture Notes in Electrical Engineering, 2689–700. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8155-7_225.

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Brijeshkumar, Prajapati, and B. Santhosh. "Dynamics and Isolation Capabilities of a Magnetic Spring-Based Quasi-Zero Stiffness Vibration Isolation Mechanism for Passenger Vehicle Seat Isolation." In Lecture Notes in Mechanical Engineering, 621–30. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1769-0_56.

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Xu, Binghui, Chunsheng Song, and Yuegang Tan. "Research on LQR Control of Magnetic Suspension Active Vibration Isolation System Based on Multi-population Genetic Algorithm." In Lecture Notes in Electrical Engineering, 672–88. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9437-0_69.

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Yang, Qi, Youliang Jiang, and Chunsheng Song. "Control Strategy Design of Magnetic-Air Active-Passive Hybrid Floating Raft Vibration Isolation System: Optimized Type-2 Fuzzy Control System." In Proceedings of the Eighth Asia International Symposium on Mechatronics, 1642–58. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1309-9_158.

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Palagummi, S., and F. G. Yuan. "Magnetic levitation and its application for low frequency vibration energy harvesting." In Structural Health Monitoring (SHM) in Aerospace Structures, 213–51. Elsevier, 2016. http://dx.doi.org/10.1016/b978-0-08-100148-6.00008-1.

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"The concept of vibration isolation with variable stiffness with the use of magnetic elements." In New techniques and methods for noise and vibration measuring, assessing and reducing. Digital Monograph. Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy, 2022. http://dx.doi.org/10.54215/noise_control_2022_a_digital_monograph_adamczyk_j_targosz_j_bednarz_j.

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Conference papers on the topic "Magnetic levitation; vibration isolation"

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Huang, Cuicui, Weihua Dong, Xiaolong Li, and Zhiqiang Long. "Research on Control System of Magnetic Levitation Compound Vibration Isolation Based on Tracking Differentiator." In 2021 China Automation Congress (CAC). IEEE, 2021. http://dx.doi.org/10.1109/cac53003.2021.9728220.

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Zhang, Bo, Weihua Dong, Xiaolong Li, and Zhiqiang Long. "Design of Active-Passive Composite Vibration Isolation System of Magnetic Levitation and Spring Based on Fuzzy PID Control." In 2020 Chinese Automation Congress (CAC). IEEE, 2020. http://dx.doi.org/10.1109/cac51589.2020.9326769.

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Wu, Qianqian, Honghao Yue, Rongqiang Liu, Liang Ding, and Zongquan Deng. "Simulation of Multi-Closed Loop Control With Feed Forward Control of Micro-Vibration Isolation Platform." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37253.

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Micro vibration in the ideal-zero gravity environments has complicated science experiment results. A magnetic levitation vibration isolation platform is needed to isolate the vibration source to provide acceptable acceleration level in low frequency range. The configuration of the Lorentz actuators is discussed in the paper. And the modeling of the transformation matrix from the force to the current is deduced. In order to generate desired force, the current is needed to predict precisely. To study the characteristics of the system, the single degree of freedom system is analyzed. A multi-closed loop control scheme is put forward to achieve vibration isolation control. To evaluate the effect of each control parameter, frequency domain analysis of the transfer function is simulated. In order to further increase the control effectiveness, a feed forward compensation control algorithm is added to control the vibration of cables that connect the upper platform and the base. By regulating these control parameters, bode curves can be obtained. Comparing the two methods, it can be concluded that the control method with feed forward compensation is better than the one without that.
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Kim, Won-Jong, and Shobhit Verma. "Multi-Axis Maglev Positioner With High Resolution Over Large Travel Range." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80050.

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This paper presents a novel multi-axis positioner that operates on the magnetic-levitation (maglev) principle. This maglev stage is capable of positioning at the resolution of a few nanometers over a planar travel range of several millimeters. A novel actuation scheme was developed for the compact design of this stage that enables 6-axis force generation with just 3 permanent magnets. We calculated the forces with electromagnetic analysis over the whole travel range and experimentally verified them with a unit actuator. The single moving part, namely the platen, is modeled as a pure mass due to the negligible effect of magnetic spring and damping. There are 3 laser interferometers and 3 capacitance sensors to sense the 6-axis position/rotation of the platen. A lead-lag compensator was designed and implemented to control each axis. A nonlinear model of the force was developed by electromagnetic analysis, and feedback linearization was applied to cancel the nonlinearity of the actuators over the large travel range. Various experiments were conducted to test positioning, loading, and vibration-isolation capabilities. This maglev stage has a moving mass of 0.267 kg. Its position resolution is 4 nm over a travel range of 5 × 5 mm in the x-y plane. It can carry and precisely position an additional payload of 2 kg. Its potential applications include semiconductor manufacturing, micro-fabrication and assembly, nanoscale profiling, and nano-indentation.
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Jiang, Changan, and Satoshi Ueno. "Development of magnetic levitation device for active vibration control." In 2016 International Conference on Advanced Mechatronic Systems (ICAMechS). IEEE, 2016. http://dx.doi.org/10.1109/icamechs.2016.7813426.

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Stuart, Keith O. "Use Of Magnetic Suspension For Sensor Vibration Isolation." In 32nd Annual Technical Symposium, edited by Paul A. Henkel, Francis R. LaGesse, and Wayne W. Schurter. SPIE, 1989. http://dx.doi.org/10.1117/12.948620.

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Trimboli, M. S., Roger Wimmel, and Elmar J. Breitbach. "Quasi-active approach to vibration isolation using magnetic springs." In 1994 North American Conference on Smart Structures and Materials, edited by Conor D. Johnson. SPIE, 1994. http://dx.doi.org/10.1117/12.174116.

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Funakoshi, Daisuke, Sachito Okada, Toru Watanabe, and Kazuto Seto. "Levitation and Vibration Supression of an Elastic Rotor by Using Active Magnetic Bearings." In ASME 2012 5th Annual Dynamic Systems and Control Conference joint with the JSME 2012 11th Motion and Vibration Conference. ASME, 2012. http://dx.doi.org/10.1115/dscc2012-movic2012-8602.

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Elbarbary, A., E. Elghandour, G. Scott, and T. Le. "Magnetic and Elastomeric Damping Effects on the Vibration Amplitude of a Vibration Isolation System." In SAMPE 2020 | Virtual Series. NA SAMPE, 2020. http://dx.doi.org/10.33599/382/s.20.0069.

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Elbarbary, A., E. Elghandour, G. Scott, and T. Le. "Magnetic and Elastomeric Damping Effects on the Vibration Amplitude of a Vibration Isolation System." In SAMPE 2020 | Virtual Series. NA SAMPE, 2020. http://dx.doi.org/10.33599/s.20.0069.

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You might also be interested in the extended bibliographies on the topic 'Magnetic levitation; vibration isolation' for particular source types:
Journal articles
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