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Research on modeling and self-excited vibration mechanism in magnetic levitation-collision interface coupling system
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作者 Jinghu TANG Chaofeng LI +1 位作者 Jin ZHOU Zhiwei WU 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2024年第5期873-890,共18页
The modeling and self-excited vibration mechanism in the magnetic levitation-collision interface coupling system are investigated.The effects of the control and interface parameters on the system's stability are a... The modeling and self-excited vibration mechanism in the magnetic levitation-collision interface coupling system are investigated.The effects of the control and interface parameters on the system's stability are analyzed.The frequency range of self-excited vibrations is investigated from the energy point of view.The phenomenon of self-excited vibrations is elaborated with the phase trajectory.The corresponding control strategies are briefly analyzed with respect to the vibration mechanism.The results show that when the levitation objects collide with the mechanical interface,the system's vibration frequency becomes larger with the decrease in the collision gap;when the vibration frequency exceeds the critical frequency,the electromagnetic system continues to provide energy to the system,and the collision interface continuously dissipates energy so that the system enters the self-excited vibration state. 展开更多
关键词 magnetic levitation coupling system self-excited vibration mechanical interface vibration frequency
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Disturbance rejection tube model predictive levitation control of maglev trains
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作者 Yirui Han Xiuming Yao Yu Yang 《High-Speed Railway》 2024年第1期57-63,共7页
Magnetic levitation control technology plays a significant role in maglev trains.Designing a controller for the levitation system is challenging due to the strong nonlinearity,open-loop instability,and the need for fa... Magnetic levitation control technology plays a significant role in maglev trains.Designing a controller for the levitation system is challenging due to the strong nonlinearity,open-loop instability,and the need for fast response and security.In this paper,we propose a Disturbance-Observe-based Tube Model Predictive Levitation Control(DO-TMPLC)scheme combined with a feedback linearization strategy for the levitation system.The proposed strategy incorporates state constraints and control input constraints,i.e.,the air gap,the vertical velocity,and the current applied to the coil.A feedback linearization strategy is used to cancel the nonlinearity of the tracking error system.Then,a disturbance observer is implemented to actively compensate for disturbances while a TMPLC controller is employed to alleviate the remaining disturbances.Furthermore,we analyze the recursive feasibility and input-to-state stability of the closed-loop system.The simulation results indicate the efficacy of the proposed control strategy. 展开更多
关键词 Maglev trains levitation system Constrained control Disturbance observer Model predictive control
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Levitation现象研究进展
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作者 傅源方 《化工科技》 CAS 2007年第2期42-47,共6页
漂浮(Levitation)现象可以定义为这样一种稳定情况,即在垂直振荡流体中颗粒的重力被完全抵消而仅在某一固定位置附近做振荡运动。作者分析了国内外研究现状,综述了以往学者对该现象进行的实验研究、理论分析以及数值模拟等工作。通过对L... 漂浮(Levitation)现象可以定义为这样一种稳定情况,即在垂直振荡流体中颗粒的重力被完全抵消而仅在某一固定位置附近做振荡运动。作者分析了国内外研究现状,综述了以往学者对该现象进行的实验研究、理论分析以及数值模拟等工作。通过对Levitation现象研究文献的综述,总结了以往学者的一些研究成果,分析了他们所开展的研究之间的共性和分歧,在此基础上提出了目前对Levitation现象研究需解决的问题并对Levitation现象今后研究需要进一步解决的问题做了探讨。 展开更多
关键词 levitation 振荡流体 颗粒运动 延时 漂浮
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STUDY ON DYNAMIC CHARACTERISTICS OF ACOUSTIC LEVITATION
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作者 高建荣 曹崇德 魏炳波 《Chinese Journal of Aeronautics》 SCIE EI CSCD 1998年第3期69-75,共7页
The dynamic characteristics of acoustic levitation were investigated for the purpose of containerless processing of materials. Experimental measurements were accomplished on the variations of sound pressure level with... The dynamic characteristics of acoustic levitation were investigated for the purpose of containerless processing of materials. Experimental measurements were accomplished on the variations of sound pressure level with both axial position z (6.5mm≤ z ≤27.5mm) and radial position r (1mm≤ r ≤16mm) in a cylindrical resonant tube(34mm×45mm) of a single axis acoustic levitator. The results showed that the minimum sound pressure levels in both axial and radial directions occur at the centres of two transverse intercepting planes with z =8.5mm and z =21.5mm, which were identified as the sound pressure nodes not only of the axial direction but also of the radial direction, and hence were expected to have good levitation stability. This was further proved by experimental observations. 展开更多
关键词 containerless processing acoustic levitation sound pressure levitation stability
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Effective method to control the levitation force and levitation height in a superconducting maglev system
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作者 杨芃焘 杨万民 +2 位作者 王妙 李佳伟 郭玉霞 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第11期483-487,共5页
The influence of the width of the middle magnet in the permanent magnet guideways (PMGs) on the levitation force and the levitation height of single-domain yttrium barium copper oxide (YBCO) bulks has been investi... The influence of the width of the middle magnet in the permanent magnet guideways (PMGs) on the levitation force and the levitation height of single-domain yttrium barium copper oxide (YBCO) bulks has been investigated at 77 K under the zero field cooled (ZFC) state. It is found that the largest levitation force can be obtained in the system with the width of the middle magnet of the PMG equal to the size of the YBCO bulk when the gap between the YBCO bulk and PMG is small. Both larger levitation force and higher levitation height can be obtained in the system with the width of the middle magnet of the PMG larger than the size of the YBCO bulk. The stiffness of the levitation force between the PMG and the YBCO bulk is higher in the system with a smaller width of the middle magnet in the PMG. These results provide an effective way to control the levitation force and the levitation height for the superconducting maglev design and applications. 展开更多
关键词 permanent magnet guideway levitation force levitation height
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Effect of sample radius on stability of electromagnetic levitation melting
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作者 马伟增 郑红星 +1 位作者 季诚昌 李建国 《Journal of Central South University of Technology》 2004年第1期31-35,共5页
Based on the power dissipating model of spherical sample in free convection gas medium and the expression of input power, the model of temperature calculation for electromagnetic levitation melting sample was establis... Based on the power dissipating model of spherical sample in free convection gas medium and the expression of input power, the model of temperature calculation for electromagnetic levitation melting sample was established. Considering the limitation of levitation force and levitation sample temperature,the principle of stability levitation zone computation was determined. A spherical sample (ThDy)Fe2 under the protection of argon gas was examined, and the effect of radius of levitation sample and perturbation on the stable levitation zone was investigated. The results show that longitudinal perturbation and transverse perturbation can shorten the length of stable levitation zone and the range of levitation sample radius. By increasing the sample radius and weakening the perturbation the electromagnetic levitation melting stability of sample can be improved. 展开更多
关键词 electromagnetic levitation melting stable levitation zone PERTURBATION (TbDy)Fe_2 alloy
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A practical robust nonlinear controller for maglev levitation system 被引量:5
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作者 李金辉 李杰 张耿 《Journal of Central South University》 SCIE EI CAS 2013年第11期2991-3001,共11页
In order to explore the precise dynamic response of the maglev train and verify the validity of proposed controller,a maglev guideway-electromagnet-air spring-cabin coupled model is developed in the first step.Based o... In order to explore the precise dynamic response of the maglev train and verify the validity of proposed controller,a maglev guideway-electromagnet-air spring-cabin coupled model is developed in the first step.Based on the coupled model,the stresses of the modules are analyzed,and it is pointed out that the inherent nonlinearity,the inner coupling,misalignments between the sensors and actuators,and external disturbances are the main issues that should be considered for the maglev engineering.Furthermore,a feedback linearization controller based on the mathematical model of a maglev module is derived,in which the nonlinearity,coupling and misalignments are taken into account.Then,to attenuate the effect of external disturbances,a disturbance observer is proposed and the dynamics of the estimation error is analyzed using the input-to-state stability theory.It shows that the error is negligible under a low-frequency disturbance.However,at the high-frequency range,the error is unacceptable and the disturbances can not be compensated in time,which lead to over designed fluctuations of levitation gap,even a clash between the upper surface of electromagnet and lower surface of guideway.To solve this problem,a novel nonlinear acceleration feedback is put forward to enhancing the attenuation ability of fast varying disturbances.Finally,numerical comparisons show that the proposed controller outperforms the traditional feedback linearization controller and maintains good robustness under disturbances. 展开更多
关键词 dynamic robust nonlinear DECOUPLING separation levitation system MAGLEV
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A practical nonlinear controller for levitation system with magnetic flux feedback 被引量:4
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作者 李金辉 李杰 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第7期1729-1739,共11页
This work proposes a practical nonlinear controller for the MIMO levitation system. Firstly, the mathematical model of levitation modules is developed and the advantages of the control scheme with magnetic flux feedba... This work proposes a practical nonlinear controller for the MIMO levitation system. Firstly, the mathematical model of levitation modules is developed and the advantages of the control scheme with magnetic flux feedback are analyzed when compared with the current feedback. Then, a backstepping controller with magnetic flux feedback based on the mathematical model of levitation module is developed. To obtain magnetic flux signals for full-size maglev system, a physical method with induction coils installed to winding of the electromagnet is developed. Furthermore, to avoid its hardware addition, a novel conception of virtual magnetic flux feedback is proposed. To demonstrate the feasibility of the proposed controller, the nonlinear dynamic model of full-size maglev train with quintessential details is developed. Based on the nonlinear model, the numerical comparisons and related experimental validations are carried out. Finally, results illustrating closed-loop performance are provided. 展开更多
关键词 MAGLEV levitation system BACKSTEPPING magnetic flux
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Levitation mechanism modelling for maglev transportation system 被引量:3
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作者 周海波 段吉安 《Journal of Central South University》 SCIE EI CAS 2010年第6期1230-1237,共8页
A novel maglev transportation system was proposed for large travel range ultra precision motion.The system consists of a levitation subsystem and a propulsion subsystem.During the propulsion subsystem driving the movi... A novel maglev transportation system was proposed for large travel range ultra precision motion.The system consists of a levitation subsystem and a propulsion subsystem.During the propulsion subsystem driving the moving platform along the guideway,the levitation subsystem uses six pairs of electromagnets to steadily suspend the moving platform over the guideway.The model of the levitation system,which is a typical nonlinear multi-input multi-output coupling system and has many inner nonlinear coupling characteristics,was deduced.For testifying the model,the levitation mechanism was firstly controlled by proportional-integral-differential(PID) control,and then a lot of input-output data were collected for model parameter identification.The least-square parameter identification method was used.The identification results prove that the model is feasible and suitable for the real system. 展开更多
关键词 maglev transportation system levitation mechanism MODELING parameters identification
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A novel superconducting magnetic levitation method to support the laser fusion capsule by using permanent magnets 被引量:5
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作者 Xiaojia Li Tingting Xiao +3 位作者 Fengwei Chen Yingjuan Zhang Xiaofei Li Weidong Wu 《Matter and Radiation at Extremes》 SCIE EI CAS 2018年第3期104-109,共6页
A novel magnetic levitation support method is proposed, which can relieve the perturbation caused by traditional support methods andprovide more accurate position control of the capsule. This method can keep the perfe... A novel magnetic levitation support method is proposed, which can relieve the perturbation caused by traditional support methods andprovide more accurate position control of the capsule. This method can keep the perfect symmetry of the octahedral spherical hohlraum and hasthe characteristics in stability, tunability and simplicity. It is also favorable that all the results, such as supporting forces acting on the super-conducting capsule, are calculated analytically, and numerical simulations are performed to verify these results. A typical realistic design isproposed and discussed in detail. The superconducting coating material is suggested, and the required superconducting properties are listed.Damped oscillation of the floating capsule in thin helium gas is discussed, and the restoring time is estimated. 展开更多
关键词 ICF capsule support Magnetic levitation SYMMETRY
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ELECTROMAGNETIC MODEL OF LEVITATION MELTING WITH COLD CRUCIBLE 被引量:3
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作者 Deng Kang Zhou Yueming +3 位作者 Ren Zhongming Zhu Shoujun Wei Jihe Jiang Guochang(Shanghai Enhanced Laboratory of Ferrometallurgy,Shanghai University, Shanghai 200072) 《中国有色金属学会会刊:英文版》 CSCD 1996年第2期12-17,共6页
ELECTROMAGNETICMODELOFLEVITATIONMELTINGWITHCOLDCRUCIBLEDengKang;ZhouYueming;RenZhongming;ZhuShoujun;WeiJihe;... ELECTROMAGNETICMODELOFLEVITATIONMELTINGWITHCOLDCRUCIBLEDengKang;ZhouYueming;RenZhongming;ZhuShoujun;WeiJihe;JiangGuochang(Sha... 展开更多
关键词 COLD CRUCIBLE ELECTROMAGNETIC INDUCTION levitation MELTING
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Design and Implementation of Digital Fractional Order PID Controller Using Optimal Pole-Zero Approximation Method for Magnetic Levitation System 被引量:3
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作者 Amit S.Chopade Swapnil W.Khubalkar +2 位作者 A.S.Junghare M.V.Aware Shantanu Das 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2018年第5期977-989,共13页
The aim of this paper is to employ fractional order proportional integral derivative(FO-PID)controller and integer order PID controller to control the position of the levitated object in a magnetic levitation system(M... The aim of this paper is to employ fractional order proportional integral derivative(FO-PID)controller and integer order PID controller to control the position of the levitated object in a magnetic levitation system(MLS),which is inherently nonlinear and unstable system.The proposal is to deploy discrete optimal pole-zero approximation method for realization of digital fractional order controller.An approach of phase shaping by slope cancellation of asymptotic phase plots for zeros and poles within given bandwidth is explored.The controller parameters are tuned using dynamic particle swarm optimization(d PSO)technique.Effectiveness of the proposed control scheme is verified by simulation and experimental results.The performance of realized digital FO-PID controller has been compared with that of the integer order PID controllers.It is observed that effort required in fractional order control is smaller as compared with its integer counterpart for obtaining the same system performance. 展开更多
关键词 Approximation methods digital control dis-cretization fractional calculus fractional order PID controller(FO-PID) magnetic levitation particle swarm optimization(PSO) position control.
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THE ELECTROMAGNETIC FIELD CALCULATION AND ANALYSIS OF LEVITATION MELTING WITH COLD CRUCIBLE 被引量:3
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作者 K. Deng, Z.M. Ren, J.Q. Chen and G.C. Jiang School of Materials, Shanghai University, Shanghai 200072, China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第2期702-707,共6页
In this paper, using the quasi-3D coupled current method, the influences of structure of cold crucible, the power frequency, the electricity property of melt, the coil position and current on the electromagnetic field... In this paper, using the quasi-3D coupled current method, the influences of structure of cold crucible, the power frequency, the electricity property of melt, the coil position and current on the electromagnetic field (EMF) and the levitation characteristics in the melting processes are analyzed. It is shown that in the processes of levitation melting with cold crucible, the power frequency and cold crucible structure are the decisive factors for the ability of magnetic flux penetrating into cold crucible. The magnetic flux density in cold crucible is reduced as the increasing of power frequency, and this tendency becomes stronger when the power frequency is higher than 100kHz. The segmented structure of cold crucible can reduce the induction eddy in itself effectively, and the higher the power frequency is, the better the result is. So, a cold crucible can be segmented into 16-20 sectors for high frequency electromagnetic field and/or 8-12 sectors for lower frequency one. It is also shown that the levitation force of melting charge is related to coil current as a parabolic function. 展开更多
关键词 cold crucible electromagnetic levitation melting electromagnetic field (EMF) numerical analysis
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Physical Properties of Liquid Terbium Measured by Levitation Techniques 被引量:2
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作者 Paul-Francois Paradis Takehiko Ishikawa +1 位作者 Noriyuki Koike Yuki Watanabe 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第6期665-669,共5页
To understand the nature and behavior of rare earth metals in their liquid phases, accurate values of their physical properties are essential. However, to measure their physical properties, the samples should be maint... To understand the nature and behavior of rare earth metals in their liquid phases, accurate values of their physical properties are essential. However, to measure their physical properties, the samples should be maintained in liquid phases for prolonged time, and this raises a formidable challenge. This is mainly explained by their high melting temperatures (e.g., 1629 K for Tb), high vapor pressure, and the risk of melt contamination with a crucible or support. An electrostatic levitation furnace alleviated these difficulties and allowed the determination of density, surface tension, and viscosity of several metals above their melting temperature. Here, first, the levitation furnace facility and the noncontact diagnostic procedures were briefly discussed, followed by the explanation of their thermophysical property measurements over wide temperature ranges. The density was obtained using an ultraviolet-based imaging technique that allowed excellent illumination, even at elevated temperatures. Over the 1615 to 1880 K temperature span, the density measurements could be expressed as p(T) =7.84 × 10^3 -0.47 (T - Tm) (kg · m^-3) with Tm = 1629 K, yielding a volume expansion coefficient a(T) = 6.0 × 10^-5 (K^-1). In addition, the surface tension and the viscosity could be determined by inducing a drop oscillation to a molten sample. Using this technique, the surface tension data could be expressed as σ(T) = 8.93 × 10^2 - 0.10 (T - Tm)(mN· m^-1) and those for viscosity as η(T) =0.583 exp [4.1 × 10^4/(RT)] (MPa·s) over the 1690 to 1980 K temperature range 展开更多
关键词 levitation LIQUID NONCONTACT TERBIUM rare earths
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Vacuum Electromagnetic Levitation Melting and Undercooling of Peritectic Terfenol-D 被引量:2
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作者 马伟增 郑红星 +1 位作者 季诚昌 李建国 《Journal of Rare Earths》 SCIE EI CAS CSCD 2003年第5期563-566,共4页
For the first time, the undercooling of a magnetostrictive material a near peritectic Tb 0.27 Dy 0.73 Fe 1.90 alloy was realized by vacuum electromagnetic levitation melting and 60 K undercooling was obt... For the first time, the undercooling of a magnetostrictive material a near peritectic Tb 0.27 Dy 0.73 Fe 1.90 alloy was realized by vacuum electromagnetic levitation melting and 60 K undercooling was obtained. There is one recalescence behavior during solidification of the undercooled melt,which can attribute to the priority precipitation of REFe 2 phase instead of REFe 3 phase, due to preferential nucleation and higher crystal growth rate of REFe 2 phase and the suppression of peritectic reaction. According to the crystal structural characteristics of REFe 2 and REFe 3, REFe 2 is a Laves phase intermetallics with MgCu 2 type structure, which has similar polytetrahedral structure with short range ordered structure in undercooled melt and has lower potential barrier for nucleation than that of REFe 3,which lead to the preferential nucleation of REFe 2 phase directly from the undercooled melt. Also, the similarity of structures between REFe 2 phase and undercooled melt leads to higher crystal growth rate of REFe 2 phase than that of REFe 3. 展开更多
关键词 phase diagram and phase transformation UNDERCOOLING electromagnetic levitation melting terfenol D laves phase PERITECTIC rare earths
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NUMERICAL SIMULATION OF ALTERNATIVE HORIZONTAL LEVITATION ELECTROMAGNETIC CONTINUOUS CASTING(Ⅱ) 被引量:4
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作者 Zhu Shoujun Ren Zhongming +1 位作者 Deng Kang Jiang Guochang(Shanghai Enhanced Laboratory of Ferrometallurgy,Shanghai University,Shanghai 200072) 《中国有色金属学会会刊:英文版》 CSCD 1996年第4期42-46,共5页
NUMERICALSIMULATIONOFALTERNATIVEHORIZONTALLEVITATIONELECTROMAGNETICCONTINUOUSCASTING(Ⅱ)¥ZhuShoujun;RenZhongm... NUMERICALSIMULATIONOFALTERNATIVEHORIZONTALLEVITATIONELECTROMAGNETICCONTINUOUSCASTING(Ⅱ)¥ZhuShoujun;RenZhongming;DengKang;Jian... 展开更多
关键词 HORIZONTAL ELECTROMAGNETIC CONTINUOUS CASTING ELECTROMAGNETIC levitation NUMERICAL simulation
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Study on Transient Properties of Levitated Object in Near-Field Acoustic Levitation 被引量:1
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作者 贾兵 陈超 赵淳生 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第12期1119-1124,共6页
A new approach to the study on the transient properties of the levitated object in near-field acoustic levitation (NFAL) is presented. In this article, the transient response characteristics, including the levitated... A new approach to the study on the transient properties of the levitated object in near-field acoustic levitation (NFAL) is presented. In this article, the transient response characteristics, including the levitated height of an object with radius of 24 mm and thickness of 5 mm, the radial velocity and pressure difference of gas at the boundary of clearance between the levitated object and radiating surface (squeeze film), is calculated according to severa/velocity amplitudes of radiating surface. First, the basic equations in fluid areas on Arbitrary Lagrange--Euler (ALE) form are numericaJly solved by using streamline upwind petrov gaJerkin (SUPG) finite elements method. Second, the formed a/gebraic equations and solid control equations are solved by using synchronous alternating method to gain the transient messages of the levitated object and gas in the squeeze film. Through theoretical and numerical analyses, it is found that there is a oscillation time in the transient process and that the response time does not simply increase with the increasing of velocity amplitudes of radiating surface. More investigations in this paper are helpful for the understanding of the transient properties of levitated object in NFAL, which are in favor of enhancing stabilities and responsiveness of levitated object. 展开更多
关键词 near-field acoustic levitation squeeze film transient properties
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Structure analysis of levitation chassis of medium-to-low speed maglev vehicles based on left-right decoupling 被引量:3
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作者 Fang LIU Jinwen DONG Yongzhi JING 《Journal of Modern Transportation》 2012年第2期82-87,共6页
Levitation chassis, as an extremely important component of maglev vehicles, provides functions of transmitting levitation force and steering force, and directly affects the safety performance of the vehicle. Based on ... Levitation chassis, as an extremely important component of maglev vehicles, provides functions of transmitting levitation force and steering force, and directly affects the safety performance of the vehicle. Based on the vertical dynamics model of the levitation chassis, kinetic equations of the model are established, and a simulation program is designed to analyze the structural decoupling function of the chassis, especially under the influence of elastic constraints between the left and right modules, which are exclusively owned by maglev vehicles. A finite element model of the levitation chassis based on left-right decoupling is constructed. Analysis results of the model show that the mechanical properties of the chassis tailored for the vehicle meet the design requirements, and the stiffness and strength is adequate to bear the weight of the whole vehicle. 展开更多
关键词 maglev vehicle levitation chassis DYNAMICS left-right decoupling finite element
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Design and Development of Impeller Synergic Systems of Electromagnetic Type to Levitation/Suspension Flight of Symmetrical Bodies 被引量:1
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作者 Francisco Bulnes Juan Carlos Maya Isaías Martínez 《Journal of Electromagnetic Analysis and Applications》 2012年第1期42-52,共11页
Using certain models of twistor surfaces for fields of force and the mathematical relationships that lie among fields, lines, surfaces and flows of energy, it has been designed and developed a flight electromagnetic t... Using certain models of twistor surfaces for fields of force and the mathematical relationships that lie among fields, lines, surfaces and flows of energy, it has been designed and developed a flight electromagnetic type system based on the synergic study of their electromagnetic field geodesics to generate vehicle levitation, suspension and movement without being in contact with the surface. The idea of such work is to obtain a new flight and impulse patent of an electromagnetic vehicle by principles of super-conduction and some laws of the current like Eddy currents and principles which are very similar to mechanics of sidereal objects like galaxies or stars under models of twistor surfaces. This vehicle will be controlled by one microchip that will be programmed by conscience operators algebra of electromagnetic type that leads to the flow of Eddy currents, the iso-rotations and suspension of the special geometrical characteristics vehicle, generating also on the vehicle structure certain “magnetic conscience” that provokes all movements like succeeding to the sidereal objects in the universe. 展开更多
关键词 ELECTROMAGNETIC levitation Twistor Surfaces of Impulse SYMMETRICAL Space of Iso-Rotations Superconductive Quantum Algebra Magnetic CONSCIENCE Operators
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Computation and Analysis of Propellant and Levitation Forces of a Maglev System Using FEM Coupled to External Circuit Model 被引量:1
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作者 Shiyou Yang Lin Yang Qiang Zhou 《Journal of Electromagnetic Analysis and Applications》 2010年第4期270-275,共6页
This paper studies the propellant and levitation forces of a prototype maglev system where the propellant forces are provided by a linear motor system. For this purpose, the mathematical model and method using finite ... This paper studies the propellant and levitation forces of a prototype maglev system where the propellant forces are provided by a linear motor system. For this purpose, the mathematical model and method using finite element method coupled to external circuit model is developed. The details of the propellant and levitation forces for a prototype maglev system under different operating conditions are investigated, and some directions are given for practical engineering applications. 展开更多
关键词 MAGLEV System PROPELLANT FORCE levitation FORCE Numerical COMPUTATION Finite Element Method
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