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Journal articles on the topic 'Passive magnetic suspension'

Author: Grafiati

Published: 4 May 2024

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1

Nguyen, V., J. Delamare, and J. P. Yonnet. "A passive damper for magnetic suspension." IEEE Transactions on Magnetics 30, no. 6 (1994): 4749–51. http://dx.doi.org/10.1109/20.334210.

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2

Zádor, István, Ádám Török, Pál Rácz, and Istvan Vajda. "Green Energy from Road Vehicle Shock Absorber." Materials Science Forum 792 (August 2014): 287–92. http://dx.doi.org/10.4028/www.scientific.net/msf.792.287.

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It is still a difficult problem to solve for a suspension system simultaneously to hold the body of the car in comfort and to execute the requirements of other safety systems like ABS, ESP, steer-by-wire, etc systems. Passive suspension systems are unlikely to provide a solution, the introduction of semi-active suspensions in the practical use is necessary. A possible solution could be a permanent magnetic (PM) synchronous tube generator, which can operate as a controllable shock absorber parallel with energy recuperative operation. Designer software is realized, to calculate the geometrical a

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3

Zador, István, Ádám Török, István Vajda, and László Palkovics. "OSCILLATION CONTROL OVER LIGHT DUTY CARS USING MAGNETIC SEMI-ACTIVE SHOCK ABSORBERS." TRANSPORT 26, no. 3 (2011): 284–89. http://dx.doi.org/10.3846/16484142.2011.622357.

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The present vehicles on the road are equipped with an extended range of actuators, sensors and software controlling dynamics. It is still a difficult problem to solve for a suspension system simultaneously holding the body of the car in comfort and executing requirements imposed for other safety systems like ABS, ESP, steer-by-wire etc. Passive suspension systems are unlikely to provide a solution, and therefore the introduction of semi-active suspensions in practical use is necessary. A possible solution could be a permanent magnetic (PM) synchronous tube generator that can operate as a contr

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4

D’Angola, A., G. Carbone, L. Mangialardi, and C. Serio. "Non-linear oscillations in a passive magnetic suspension." International Journal of Non-Linear Mechanics 41, no. 9 (2006): 1039–49. http://dx.doi.org/10.1016/j.ijnonlinmec.2006.10.013.

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5

LeMarquand, Guy, and Jean‐Paul Yonnet. "A partially passive magnetic suspension for a discoidal wheel." Journal of Applied Physics 64, no. 10 (1988): 5997–99. http://dx.doi.org/10.1063/1.342128.

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6

Bonisoli, E., and A. Vigliani. "Identification techniques applied to a passive elasto-magnetic suspension." Mechanical Systems and Signal Processing 21, no. 3 (2007): 1479–88. http://dx.doi.org/10.1016/j.ymssp.2006.05.009.

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7

Foong Soong, Ming, Rahizar Ramli, Ahmad Abdullah Saifizul, and Mahdieh Zamzamzadeh. "Applicability of A Rotary Eddy Current Damper in Passenger Vehicle Suspension with Parallel Inerter." International Journal of Engineering & Technology 7, no. 3.17 (2018): 76. http://dx.doi.org/10.14419/ijet.v7i3.17.16626.

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Numerous studies have proven that the performance of vehicle suspension can be benefited by an inerter in parallel to conventional spring-damper setup, yet its usability in passenger vehicle suspension is still limited by practical consideration in physical implementation. One way of achieving better physical implementation of the parallel inerter suspension layout is to exploit the inerter’s flywheel as a metallic conductor to integrate passive damping in the form of a rotary eddy current damper. However, the feasibility of eddy current damping in this specific application remains unknown. Th

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8

Cao, Shinan, Pingjuan Niu, Wei Wang, et al. "Novel Magnetic Suspension Platform with Three Types of Magnetic Bearings for Mass Transfer." Energies 15, no. 15 (2022): 5691. http://dx.doi.org/10.3390/en15155691.

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For ultra-precision, large stroke, and high start/stop acceleration, a novel magnetic suspension platform with three types of magnetic bearings is proposed. The structure and working principle of the novel platform are introduced. The passive magnetic bearings are used to compensate for the weight of the actuator. The repulsive force of the passive magnetic bearing model is established and analyzed. The Lorentz force-type magnetic bearings are used to provide driving force and rotational torque in the XY-plane. The driving force model and rotational torque model are established. The electromag

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9

Linares, Henrique, Carlos Frajuca, Fabio S. Bortoli, Givanildo A. Santos, and Francisco Y. Nakamoto. "Magnetic Suspension with Motorization to Measure the Speed of Gravity." International Journal of Modern Physics: Conference Series 45 (January 2017): 1760020. http://dx.doi.org/10.1142/s2010194517600205.

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This work aims to design a magnetic suspension for an experiment to measure gravitys velocity. Such device must rotate two objects symmetrically with the greatest mass and largest radius as possible, at the speed of [Formula: see text], which means this device falls into the high-speed machines category. The guidelines and solutions proposed in this paper constitute a contribution to this class of engineering problems and were based on an extensive literature search, contacts with experts, the tutors and author’s experience, as well as on experimental results. The main solution proposed is a h

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10

Falkowski, Krzysztof, Maciej Henzel, Paulina Kurnyta-Mazurek, Mariusz Janczewski, and Mariusz Ważny. "Magnetic Suspension Technology for Electric Jet Engines." Bulletin of the Military University of Technology 70, no. 3 (2021): 49–70. http://dx.doi.org/10.5604/01.3001.0015.8771.

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Reducing the emission of harmful compounds such as carbon dioxide and nitrogen oxides has been identified as a priority target in the European Union. Aviation is one of the main sources of pollution. The reduction of pollutant emissions can be achieved by the use of the electric jet engine. This type of a jet engine differs significantly from a kerosene-powered engine. The article presents the concept of an electric jet engine with the rotor that is magnetically suspended. Demonstrators of active and passive magnetic bearing technologies and bearingless electric motors, developed at the Avioni

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11

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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12

Dai, Changming, Zhengyuan Liu, Yu Wang, Xiang Lin, Hui Liu, and Bo Zhou. "Design and Optimization of a New Type of Magnetic Suspension Vibration Absorber for Marine Engineering." Journal of Marine Science and Engineering 11, no. 11 (2023): 2070. http://dx.doi.org/10.3390/jmse11112070.

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The magnetic suspension damper, which is based on magnetic suspension technology, is receiving more and more attention from academics as active–passive hybrid damping technology develops. A new symmetric magnetic suspension structure is constructed in this study, and the accuracy of the simulation findings is confirmed by contrasting the output from finite element simulation with the theoretical formulations. On the basis of this, how the structure, size, and material of the electromagnet and armature affect the magnetic flux density, electromagnetic force, and suspension force is investigated

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13

Falkowski, Krzysztof. "Second-Order Model of the Radial Passive Magnetic Bearing with Halbach's Array." Solid State Phenomena 198 (March 2013): 400–405. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.400.

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In the paper is presented model of the passive magnetic bearing. The response of bearing is approximate by second order model. There are presented the damping and stiffness coefficient of suspension. The coefficients derived from Biot-Savards law, Ohms law and Lorenzs force. There is presented loop with molecular current as a model of magnet, final formula of damping and stiffness coefficients and static characteristic of passive magnetic bearing.

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14

Song, Chun Sheng, and Ye Fa Hu. "Optimized Fuzzy Neural Networks Control of a Magnetic Suspension Vibration Isolation System." Applied Mechanics and Materials 226-228 (November 2012): 328–34. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.328.

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Active vibration isolation technology can overcome the defects of passive vibration isolation technology that the poor vibration isolation performance in low and resonant frequencies. Compared with other active vibration isolation technologies, magnetic suspension isolation technology has shown useful characteristics, such as wide response frequency range, fast response, high reliability and long-life. However, the control of MSVI is still one of the areas that require further investigation. This paper presents a Fuzzy Neural Networks(FNN) control algorithm for a magnetic suspension isolation

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15

Shen, Peng, Yiwen Wang, Yun Chen, Pengqiang Fu, Lijie Zhou, and Lijia Liu. "Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System." Machines 9, no. 11 (2021): 255. http://dx.doi.org/10.3390/machines9110255.

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Rotor suspension stability is one of the important performance indexes of a blood pump and the basis of determining whether the blood pump can be used in a clinic. Compared with the traditional magnetic suspension system, a single-winding, bearingless motor has the advantages of a compact structure, simple control system and low power consumption. In this pursuit, the present study aimed to envisage and design the magnetic suspension system coupled with a single-winding bearingless motor and permanent magnet bearings, establish the theoretical models of axial force and electromagnetic torque,

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16

Li, Qiang, Deng Feng Xu, Jin Chun Hu, and Liu Hao. "A Low Frequency Permanent Magnet Passive Vibration Isolator." Advanced Materials Research 586 (November 2012): 328–36. http://dx.doi.org/10.4028/www.scientific.net/amr.586.328.

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Magnetic suspension vibration isolators have attracted significant attention in the field of semiconductor industry and high precision equipments. However, it is impossible to levitate an object by only permanent magnet due to instability of permanent magnets. It needs a guide device or active control to hold the magnetic suspension passive vibration isolator (MSPVI) at equilibrium position. In order to overcome the instability of the permanent magnets, the linear bearing, rubber O-ring and rubber membrane are applied in the MSPVI. The transmissibility of the MSPVI was calculated and subsequen

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17

Seto, Kazuto. "Special Issue on Advanced Vehicle Dynamics and, Control." Journal of Robotics and Mechatronics 7, no. 4 (1995): 273. http://dx.doi.org/10.20965/jrm.1995.p0273.

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Various attempts have been made from olden days on vehicles for better riding comfort and for improved maneuverability. Past vehicles have achieved vibration isolation performance, which relaxes impact from road surfaces, by means of link mechanisms and passive suspensions consisting of springs and dampers, as well as basic motion performance such as running, turning, and stopping. However, as far as passenger cars are concerned, a passive suspension has its own limitation, and the contradiction that if riding comfort is to be improved at low speeds, the maneuverability during high-speed opera

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18

Jiang, Weikang, Yuanyuan Song, Yongming Xu, Ran Zhou, Feng Sun, and Xiaoyou Zhang. "Energy-Harvesting Characteristics of a Dual-Mode Magnetic Suspension for Vehicles: Analysis and Experimental Verification." Actuators 11, no. 12 (2022): 363. http://dx.doi.org/10.3390/act11120363.

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The advantages of the proposed dual-mode magnetic suspension are it having a high level of safety and a compact structure compared with the previous studies. However, the structure parameters can affect the energy harvesting of the suspension system. Therefore, this paper aims to analyze the energy-harvesting characteristics of the proposed dual-mode magnetic suspension. Firstly, the structure and working principle of the proposed suspension are introduced. Then, the influences of the various parameters for the actuator on the energy regeneration characteristics are analyzed by the finite elem

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19

Diez-Jimenez, Efren, Cristina Alén-Cordero, Roberto Alcover-Sánchez, and Eduardo Corral-Abad. "Modelling and Test of an Integrated Magnetic Spring-Eddy Current Damper for Space Applications." Actuators 10, no. 1 (2021): 8. http://dx.doi.org/10.3390/act10010008.

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We present the design, manufacturing, and dynamical characterization of a mechanical suspension made by a passive magnetic spring and an eddy current damper integrated into a single device. Three configurations with 2, 3, and 4 permanent magnets axially distributed with opposite polarizations are designed, simulated, manufactured, and tested. Stiffness of 2410, 2050, 2090 N/m and damping coefficient of 5.45, 10.52 and 17.25 Ns/m are measured for the 2-, 3-, and 4-magnets configurations, respectively. The magnetic suspension provides good mechanical properties combined with excellent cleanness

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20

Qian, Kun Xi, Z. H. Xu, and H. Wang. "Effects of Rotational Inertia and Bearing Force on Stability of Permanent Maglev Rotator." Applied Mechanics and Materials 150 (January 2012): 50–56. http://dx.doi.org/10.4028/www.scientific.net/amm.150.50.

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The authors’ former works demonstrated that a passive magnetic (PM) rotator supported merely by PM bearings has a minimal speed, above which it can stabilize its equilibrium, under the function of a so-called Gyro-effect. It is unclear, however, by which factors is this minimal speed determined. This paper investigated the factors affecting the minimal stable speed of permanent maglev rotator, namely, the rotating inertia and PMB force. Two novel permanent maglev turbine models were designed: Model A---one stator and three rotors which have the same size but different rotational inertias; Mode

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21

Tozoni, O. V. "Gas Gun Accelerator Based on Passive Magnetodynamic Suspension." IEEE Transactions on Magnetics 40, no. 3 (2004): 1642–49. http://dx.doi.org/10.1109/tmag.2004.826614.

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22

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 (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 electr

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23

Gao, Xiang, Junchuan Niu, Ruihao Jia, and Zhihui Liu. "Influential characteristics of electromagnetic parameters on self-powered MR damper and its application in vehicle suspension system." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 234, no. 1 (2019): 38–49. http://dx.doi.org/10.1177/1464419319870338.

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In order to reuse the energy dissipated by magneto-rheological (MR) damper, a self-powered MR damper is designed and analyzed theoretically. The main thrust of this work is establishing the mechanical-electromagnetic coupling model of quarter vehicle suspension based on self-powered MR damper, whilst the energy conversion efficiency of self-powered MR damper with electromagnetic parameters changing is investigated. The magnetic circuit model is formulated firstly. The influence of electromagnetic parameters on current in MR damper is analyzed systemically in frequency domain. A multi-objective

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24

Vataev, Andrew S., Olga A. Dedova, and Victor V. Nikitin. "Efficiency of ferromagnetic shielding of superconducting coils of high-speed maglev crew." Modern Transportation Systems and Technologies 9, no. 2 (2023): 19–32. http://dx.doi.org/10.17816/transsyst20239219-32.

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Background: Magnetic levitation transport with combined traction, suspension and guidance systems based on superconducting coils (SCC) allows reaching speeds of up to 500600 km/h with a very significant (up to 150200 mm) air gap, which is an important factor in ensuring the safety of high-speed transportation. However, SCC are a source of strong external magnetic fields, which, in conditions of limited crew dimensions, can have a harmful effect on both passengers and on-board auxiliary equipment. Aim: to analyze the external magnetic fields of the SCC systems for traction, suspension and

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25

Kustosz, R., I. Altyntsev, M. Darlak, et al. "The Tin Coatings Utilisation As Blood Contact Surface Modification In Implantable Rotary Left Ventricle Assist Device Religaheart Rot." Archives of Metallurgy and Materials 60, no. 3 (2015): 2253–60. http://dx.doi.org/10.1515/amm-2015-0371.

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Abstract Constructions of the mechanical-bearingless centrifugal blood pumps utilize different types of non-contact physical bearings, which allows to balance the forces that have an impact on the pump impeller, stabilizing its position in the pump house without wall contact. The paper presents investigations of the hybrid (passive magnetic bearings and hydrodynamic bearings) suspension system for the centrifugal blood pump. Numerical simulations were used to evaluate the hydrodynamic bearing lifting force and magnetic bearing forces interaction. An important aspect of rotor suspension system

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26

Shinshi, Tadahiko, Daisuke Shimizu, Kazuhide Kodeki, and Kazuhiko Fukushima. "A Fast Steering Mirror Using a Compact Magnetic Suspension and Voice Coil Motors for Observation Satellites." Electronics 9, no. 12 (2020): 1997. http://dx.doi.org/10.3390/electronics9121997.

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Fast steering mirrors (FSMs) are used to correct images observed by satellites. FSMs need to have large apertures and realize high precision and the positioning of the mirror in the tip-tilt and axial directions needs to be highly precise and highly responsive in order to capture large-scale, high-resolution images. An FSM with a large-diameter mirror supported by a compact magnetic suspension and driven by long-stroke voice coil motors (VCMs) is proposed in this paper. The magnetic suspension and VCM actuators enable the mirror to be highly responsive and to have long-range movement in the ti

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27

Zhou, Ran, Yuanyuan Song, Junjie Jin, et al. "Dynamic Performance of a Magnetic Energy-Harvesting Suspension: Analysis and Experimental Verification." Actuators 12, no. 8 (2023): 308. http://dx.doi.org/10.3390/act12080308.

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The advantages of the proposed novel magnetic energy-harvesting suspension (MEHS) are high safety, compact structure and convenient maintenance, compared with the previous studies. However, the force generated by the energy harvester with harvesting energy can affect the motion of the mechanical system. Therefore, this paper aims to analyze the ride comfort and road handling of the MEHS, and investigates the dynamic performance of the MEHS. Firstly, the structure and the working principle of the MEHS are illustrated and introduced, and the dynamic mechanism of the quarter-vehicle with the MEHS

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28

Martynenko, Gennadii. "APPLICATION OF NONLINEAR MODELS FOR A WELL-DEFINED DESCRIPTION OF THE DYNAMICS OF ROTORS IN MAGNETIC BEARINGS." EUREKA: Physics and Engineering 3 (May 31, 2016): 3–12. http://dx.doi.org/10.21303/2461-4262.2016.00074.

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A research report has been submitted. It deals with implementing a method for a mathematical description of the nonlinear dynamics of rotors in magnetic bearings of different types (passive and active). The method is based on Lagrange-Maxwell differential equations in a form similar to that of Routh equations in mechanics. The mathematical models account for such nonlinearities as the nonlinear dependencies of magnetic forces on gaps in passive and active magnetic bearings and on currents in the windings of electromagnets; nonlinearities related to the inductances in coils; the geometric link

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29

Shiao, Yao Jung, and Yao Kuan Huang. "Design of a Novel Damping-Controllable Damper for Suspension Systems." Advanced Materials Research 338 (September 2011): 622–25. http://dx.doi.org/10.4028/www.scientific.net/amr.338.622.

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Conventional oil dampers are non-controllable passive dampers because the viscosity of the fluid used is not wide-range variable. By using magneto-rheological fluid (MRF), MRF damper has excellent performance for variable-damping applications. Due to the single-coil design in the general MRF damper, the obtained damping from MR effect is not quite large. This research provides a high-damping MRF damper by adopting multi-pole coil and special polarization configuration. The simulated results show that the new MRF damper has good performance in the magnetic field and damping. Compared with a sim

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30

Kublin, Tomasz, Lech Grzesiak, Paweł Radziszewski, Marcin Nikoniuk, and Łukasz Ordyszewski. "Reducing the Power Consumption of the Electrodynamic Suspension Levitation System by Changing the Span of the Horizontal Magnet in the Halbach Array." Energies 14, no. 20 (2021): 6549. http://dx.doi.org/10.3390/en14206549.

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In high-speed magnetic railways, it is necessary to create the forces that lift the train. This effect is achieved by using active (EMS) or passive (EDS) magnetic systems. In a passive system, suspension systems with permanent magnets arranged in a Halbach array can be used. In this paper, an original Halbach array with various alternately arranged horizontally and vertically magnetized magnets is proposed. Correctly selected geometry allows us to obtain higher values of levitation forces and lower braking forces in relation to a system with identical horizontally and vertically magnetized ele

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31

Chauhan, Nileshkumar D., and Dipal Patel. "Design Optimization of Flow Mode Magnetorheological Damper." Applied Mechanics and Materials 877 (February 2018): 403–8. http://dx.doi.org/10.4028/www.scientific.net/amm.877.403.

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To control the vibrations with passive suspension system having limitation with constant damping force. By using smart material like magnetorheological fluid, it is possible to control the damping performance of suspension system using current variations in magnetic coil. Applications of this kind of damper are in front loaded washing machine and damper use in driver seat of heavy duty vehicles. Mainly flow mode MR damper is most commonly used damper for these two applications. This paper represents theoretical model and optimized design of flow mode MR damper. For any kind of MR damper design

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32

Mei, Hua Ping, Hao Yue Tian, and Shuan Huang. "Recent Study on the Passive and Active Vibration Isolators." Applied Mechanics and Materials 494-495 (February 2014): 491–96. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.491.

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The vibration isolators have witnessed significant developments due to pressing demands for high resolution metrology and manufacturing, optical, physical and chemical experiments. In the view of these requirements, the engineers and physicists have exploited different types of vibration isolators. This paper firstly presents the recent developments on the passive vibration isolators. It finds that the passive vibration isolators can constrain the high frequency oscillation. The active control is the efficient method to cancel the low frequency vibration. Then, the paper is concerned with the

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33

Fabbri, Massimo, Pier Luigi Ribani, and Davide Zuffa. "Design and testing of a magnetic suspension for a 90° horizontal bend conveyor." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 34, no. 1 (2015): 380–96. http://dx.doi.org/10.1108/compel-02-2014-0049.

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Purpose – A conveyor device is studied with the aim to reduce the friction between the inner surface of the beam and the chain. The lower is the friction between the chain and the beam, the lower is the surface wear. The magnetic repulsion force among permanent magnets (PMs) placed on the beam and on the chain is utilized to reduce friction. The paper aims to discuss these issues. Design/methodology/approach – The considered magnetic suspension is realized with PMs in repulsive configuration; it is designed by solving a constrained optimization problem, with reference to the geometry of the 90

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34

Wang, Yimei, Hossein Vatandoost, and Ramin Sedaghati. "Development of a Novel Magneto-Rheological Elastomer-Based Semi-Active Seat Suspension System." Vibration 6, no. 4 (2023): 777–95. http://dx.doi.org/10.3390/vibration6040048.

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Human operators in the transportation sector are exposed to whole-body vibration (WBV) while driving. Occupational exposure to WBV, predominant at low frequencies (<20 Hz), has been linked to spinal injuries and reduced functioning. This study aims at the design development of a novel semi-active seat suspension system featuring magneto-rheological elastomers (MREs) to mitigate the WBV. The proposed suspension system allows a greater range of strokes, while ensuring the MRE remains within an acceptable level of deformation. Several MRE samples were fabricated and characterized under shear m

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35

Li, Dengfeng, and Hector Martin Gutierrez. "Quasi-Sliding Mode Control of a High-Precision Hybrid Magnetic Suspension Actuator." Journal of Robotics and Mechatronics 25, no. 1 (2013): 192–200. http://dx.doi.org/10.20965/jrm.2013.p0192.

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A novel 1-DOF hybrid magnetic suspension actuator for precise motion control is presented. The actuator is designed to achieve sub-micron positioning accuracy over a range of motion in excess of 1000 µm while avoiding large nominal levitation currents and iron core saturation. The proposed passive push-active pull configuration offers precise motion control with moderate actuator effort when a payload is to be accurately suspended over a large range of travel. The proposed actuator can be used modularly to control multiple axes of motion in a multi-DOF positioning application that requires mil

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36

Wang, Liang, Xiaoyan Tang, Zhong Yun, and Chuang Xiang. "Analysis of a Novel Magnetic-Hydrodynamic Double Levitated Motor for an Implantable Axial Flow Blood Pump." Shock and Vibration 2020 (December 10, 2020): 1–15. http://dx.doi.org/10.1155/2020/8833994.

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This paper presents a novel design for a bearingless axial flow blood pump based on the magnetic-hydrodynamic double levitated concept. In the axial direction, the magnetic levitation system consisted of two pairs of permanent magnet rings offsets the force of fluid. The hydrodynamic shell mounted on the impeller rotor is designed for generating dynamic pressure, which can balance the radial force like gravity when the blood pump is working. Because of the unsteady force and torque acting on the rotor and the passive suspension, the position of the rotor is not steady. The suspension force, st

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37

Aberturas, Susana, Juan Diego Aguilera, José Luis Olazagoitia, Miguel Ángel García, and Antonio Hernando. "Mathematical Analysis of the Electromotive Induced Force in a Magnetically Damped Suspension." Mathematics 12, no. 7 (2024): 1004. http://dx.doi.org/10.3390/math12071004.

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This study explores the advanced mathematical modeling of electromagnetic energy harvesting in vehicle suspension systems, addressing the pressing need for sustainable transportation and improved energy efficiency. We focus on the complex challenge posed by the non-linear behavior of magnetic flux in relation to displacement, a critical aspect often overlooked in conventional approaches. Utilizing Taylor expansion and Fourier analysis, we dissect the intricate relationship between oscillation and electromagnetic damping, crucial for optimizing energy recovery. Our rigorous mathematical methodo

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38

Kim, Su Deok, Seo Woo Song, Dong Yoon Oh, et al. "Microspinning: Local Surface Mixing via Rotation of Magnetic Microparticles for Efficient Small-Volume Bioassays." Micromachines 11, no. 2 (2020): 175. http://dx.doi.org/10.3390/mi11020175.

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The need for high-throughput screening has led to the miniaturization of the reaction volume of the chamber in bioassays. As the reactor gets smaller, surface tension dominates the gravitational or inertial force, and mixing efficiency decreases in small-scale reactions. Because passive mixing by simple diffusion in tens of microliter-scale volumes takes a long time, active mixing is needed. Here, we report an efficient micromixing method using magnetically rotating microparticles with patterned magnetization induced by magnetic nanoparticle chains. Because the microparticles have magnetizatio

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39

Li, Zhongxing, Chenlai Liu, Xinyan Song, and Chengchong Wang. "Vibration suppression of hub motor electric vehicle considering unbalanced magnetic pull." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 235, no. 12 (2021): 3185–98. http://dx.doi.org/10.1177/09544070211004507.

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For the hub motor electric vehicle (HM-EV), the drive motor is directly integrated with the wheel. The unbalanced magnetic pull (UMP) of hub motor would be generated by magnet gap deformation under road surface roughness excitation. The longitudinal and vertical dynamic performances of the HM-EV system are therefore deteriorated. Firstly, to analyze and optimize the longitudinal and vertical dynamic performance of the HM-EV system, a new ten-degree-of-freedom mathematical quarter HM-EV system model equipped with air suspension model, permanent magnet brushless direct current (PM BLDC) hub moto

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Luong, Quoc Viet, Dae-Sung Jang, and Jai-Hyuk Hwang. "Intelligent Control Based on a Neural Network for Aircraft Landing Gear with a Magnetorheological Damper in Different Landing Scenarios." Applied Sciences 10, no. 17 (2020): 5962. http://dx.doi.org/10.3390/app10175962.

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A typical oleo-pneumatic shock-absorbing strut (classic traditional passive damper) in aircraft landing gear has a metering pin extending through the orifice, which can vary the orifice area with the compression and extension of the damper strut. Because the metering pin is designed in a single landing condition, the traditional passive damper cannot adjust its damping force in multiple landing conditions. Magnetorheological (MR) dampers have been receiving significant attention as an alternative to traditional passive dampers. An MR damper, which is a typical semi-active suspension system, ca

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Li, Weihua, Xianzhou Zhang, and Haiping Du. "Development and simulation evaluation of a magnetorheological elastomer isolator for seat vibration control." Journal of Intelligent Material Systems and Structures 23, no. 9 (2012): 1041–48. http://dx.doi.org/10.1177/1045389x11435431.

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Driver fatigue is one of the leading factors contributing to road crashes. Environmental stress, such as unwanted seat vibration, is a key contributor to fatigue. This article presents the design and development of a magnetorheological elastomer isolator for a seat suspension system. By altering the magnetorheological elastomer isolator’s stiffness through a controllable magnetic field and selecting suitable control strategy, the system’s natural frequency can be changed to avoid resonance, which consequently reduce the vehicle’s vibration energy input to seat, and thus suppress the seat’s res

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Hassan, Hiba, Ali A. Salman, Mohammed A. Munshid та Abdulhadi Al-Janabi. "Passive Q-switching using Lead Sulfide suspension as a saturable absorber in 1.5 μm region". Optical Fiber Technology 52 (листопад 2019): 101969. http://dx.doi.org/10.1016/j.yofte.2019.101969.

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Kim, Hwan-Choong, Yu-Jeong Shin, Wonhee You, Kyu Chul Jung, Jong-Seok Oh, and Seung-Bok Choi. "A ride quality evaluation of a semi-active railway vehicle suspension system with MR damper: Railway field tests." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 231, no. 3 (2016): 306–16. http://dx.doi.org/10.1177/0954409716629706.

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This work presents experimental assessment of the improvements to the horizontal ride quality of a railway vehicle equipped with a semi-active magneto-rheological (MR) suspension system. The assessment includes the development of a mathematical model and magnetic circuit analysis of the MR damper, the design and manufacture of MR damper, and field test on the railway. After evaluating the field-dependent damping force characteristics, the conventional passive dampers of the operational railway vehicle are replaced with the MR dampers to evaluate horizontal dynamic characteristics that directly

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OHIRA, Masato, Shuya KUREBAYASHI, Takahisa OHJI, and Kenji AMEI. "Finite Element Analysis Verification of the Effect of a New Aluminum Ring Shape for Passive Magnetic Suspension Using AC Electromagnets." Journal of the Japan Society of Applied Electromagnetics and Mechanics 31, no. 2 (2023): 78–83. http://dx.doi.org/10.14243/jsaem.31.78.

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Safaeian, Reza, and Hossein Heydari. "Study effect of the back irons in passive magnetic bearings with alternating radially magnetized rings by using 2D analytical method." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 6 (2019): 1972–85. http://dx.doi.org/10.1108/compel-12-2018-0557.

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Purpose Permanent magnet passive magnetic bearings (PMBs) are used for suspension of rotating shafts in one direction. PMBs with alternating radially magnetized rings having back iron is one of the most optimum configurations among all configurations of PMBs. This paper aims to investigate the effect of the conductivity and permeability of these back irons on the stiffness and damping of the configuration. Design/methodology/approach The stiffness and damping of the configuration will be calculated through a 2D dynamic analytical method and validated by FEM simulations. Findings The results of

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Ładyżyńska-Kozdraś, Edyta, Anna Sibilska-Mroziewicz, Krzysztof Sibilski, Danyil Potoka, and Andrzej Żyluk. "Dynamics of Separation of Unmanned Aerial Vehicles from the Magnetic Launcher Cart during Takeoff." Electronics 12, no. 13 (2023): 2883. http://dx.doi.org/10.3390/electronics12132883.

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Most aircraft launchers exhibit a rapid acceleration of the launching aircraft, often exceeding ten times the acceleration due to gravity. However, only magnetic launchers offer flexible control over the propulsion force of the launcher cart, enabling precise control over the aircraft’s acceleration and speed during its movement on the launcher. Consequently, extensive research is being conducted on magnetic launchers to ensure the repeatability of launch parameters, protect against aircraft overloads, and ensure operator safety. This article describes the process of modeling and analyzing the

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Zhang, Yifan, Liang Hu, Rui Su, and Xiaodong Ruan. "Design Method of Bearingless Permanent Magnet Slice Motor for Maglev Centrifugal Pump Based on Performance Metric Cluster." Actuators 10, no. 7 (2021): 153. http://dx.doi.org/10.3390/act10070153.

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Different from ordinary AC machines, the design of a bearingless permanent magnet slice motor (BPMSM) considers not only the torque performance, but also the passive and active suspension properties. In addition, BPMSM for a maglev centrifugal pump has unique design characteristics due to the integration of the pump head and sensors. This paper investigates evaluation and design techniques based on a cluster of performance metrics targeting on developing BPMSM for a maglev centrifugal pump. The cluster of performance metrics for BPMSM, including passive stiffness (kz, kz/kx, kz/ky, kα, and kβ)

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T. S., Anilkumar, Yu-Jen Lu, and Jyh-Ping Chen. "Optimization of the Preparation of Magnetic Liposomes for the Combined Use of Magnetic Hyperthermia and Photothermia in Dual Magneto-Photothermal Cancer Therapy." International Journal of Molecular Sciences 21, no. 15 (2020): 5187. http://dx.doi.org/10.3390/ijms21155187.

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In this work, we aimed to develop liposomal nanocomposites containing citric-acid-coated iron oxide magnetic nanoparticles (CMNPs) for dual magneto-photothermal cancer therapy induced by alternating magnetic field (AMF) and near-infrared (NIR) lasers. Toward this end, CMNPs were encapsulated in cationic liposomes to form nano-sized magnetic liposomes (MLs) for simultaneous magnetic hyperthermia (MH) in the presence of AMF and photothermia (PT) induced by NIR laser exposure, which amplified the heating efficiency for dual-mode cancer cell killing and tumor therapy. Since the heating capability

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Chenchik, D., and J. Jandosov. "Synthesis and Photo-Catalytic Activity of Nanoparticles with Structure "Core/Shell": Fe3O4@SiO2@TiO2." Eurasian Chemico-Technological Journal 19, no. 2 (2017): 191. http://dx.doi.org/10.18321/ectj651.

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In this work, the nanosized magnetic Fe3O4@SiO2@TiO2 photocatalyst was prepared by sol-gel methods. First the nuclei of magnetite nanoparticles were prepared by co-precipitation of iron (II&III) salts solutions. Secondly, the magnetite nanoparticles were dispersed in ethanol using sonication, and solutions of both ammonia and tetraethoxysilane were added to the suspension under intense stirring, since it was suggested that the introduction of an intermediate passive SiO2 layer between the Fe3O4 and TiO2 phases inhibits the direct electrical contact and hence prevents the photodissolution o

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Avison, M. J., S. R. Gullans, T. Ogino, G. Giebisch, and R. G. Shulman. "Measurement of Na+-K+ coupling ratio of Na+-K+-ATPase in rabbit proximal tubules." American Journal of Physiology-Cell Physiology 253, no. 1 (1987): C126—C136. http://dx.doi.org/10.1152/ajpcell.1987.253.1.c126.

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A combination of 23Na nuclear magnetic resonance (NMR) spectroscopy and a K+-selective electrode was used to make simultaneous measurements of net Na+ and K+ fluxes across plasma membranes of rabbit renal proximal tubules after an abrupt stimulation of Na+-K+-ATPase. After a step in extracellular K+ concentration ([K+]o) from low to higher concentration (0.1-0.3 mM to 0.5-5.2 mM) at 25 degrees C, net extrusion of Na+ and uptake of K+ were observed. These fluxes were completely inhibited by ouabain (10(-3) M). Because initial rates of K+ uptake in presence or absence of Ba2+ (a known inhibitor

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