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The aim of the International Journal of Applied Electromagnetics and Mechanics is to contribute to intersciences coupling applied electromagnetics, mechanics and materials. The journal also intends to stimulate the further development of current technology in industry. The main subjects covered by the journal are:
- Physics and mechanics of electromagnetic materials and devices
- Computational electromagnetic in materials and devices
- Applications of electromagnetic fields and forces
The three interrelated key subjects - materials, electromagnetics and mechanics - include the following aspects: control, micromachines, intelligent structure, inverse problem, eddy current analysis, electromagnetic NDE, magnetic materials, magnetoelastic effects in materials, bioelectromagnetics, magnetosolid mechanics, magnetic levitations, applied physics of superconductors, superconducting magnet technology, superconducting propulsion system, nuclear fusion reactor components and wave propagation in electromagnetic fields.
Authors: Li, Hao | Luo, Jinglin | Yan, Guirong
Article Type: Research Article
Abstract: A multi-in-multi-out (MIMO) electrodynamic vibration suppression system based on global-local control strategy is established in this paper. The system has a structure composed of an upper layer and a lower layer. The lower layer employs a MIMO vibration suppression algorithm to suppress local vibration by using several eclectrodynamic vibration suppressors. The upper layer consists of a personal computer and a data acquisiton system to perform the principal component analysis of the global structural vibration. Resusts of the vibration suppression experiment on a slender structure show that the maximum vibration suppression decreased by 82%, and the overall structural average vibration decreased …by 58%, which proves that this method is effective and feasible. Show more
Keywords: MIMO, electrodynamic vibration suppressor, global-local control
DOI: 10.3233/JAE-162147
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1443-1451, 2016
Authors: Mizuno, Shota | Ishikawa, Takeo | Kurita, Nobuyuki
Article Type: Research Article
Abstract: This paper proposes a topology optimization method and rotor structure designs for a permanent magnet synchronous generator based on this method. These described designs enable high output power and less permanent magnet volume. The topology optimization method is a genetic algorithm that considers the clusters and cleaning procedure of material. The optimized rotor has a structure in which the magnet is moved in the direction of rotation, and the output power of the optimized rotor is larger than that of the Prius type generator, in spite of less PM volume.
Keywords: Topology optimization, permanent magnet synchronous generator, genetic algorithm
DOI: 10.3233/JAE-162128
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1453-1460, 2016
Authors: Kinoshita, Katsuyuki | Uchida, Koki | Imatani, Shoji
Article Type: Research Article
Abstract: We investigated the magnetic behavior of an austenitic stainless steel with an inherent magnetic sensor under cyclic deformation, as well as the factors controlling its magnetic behavior. The permeability properties of type 304 stainless steel (SUS304) specimens subjected to different prestrains were measured along the longitudinal and width directions after an arbitrary number of cycles. It was found that the estimation parameter corresponding to the variation in the permeability increased and decreased periodically with an increase the number of cycles. Moreover, after comparing the values of the estimation parameter before and after stress-relief annealing, it was determined that the internal …tensile stress of the martensite phase generated by the cyclic deformation caused the estimation parameter to decrease. This suggested that it should be possible to determine the magnitude of the inelastic strain in SUS304 on the basis of the inherent magnetic sensor. Show more
Keywords: Cyclic deformation, SUS304 stainless steel, inherent magnetism, nondestructive evaluation method
DOI: 10.3233/JAE-162231
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1461-1467, 2016
Authors: Zhou, Ying | Wang, Minghui | Zhu, Liangfan | Luo, Yun
Article Type: Research Article
Abstract: Constant-force behavior is an unique property of superelastic NiTi shape memory alloy (SMA) and could be used in designing constant-force elements in surgical devices. It is easily obtained by stretching an SMA wire. However, studies with SMA bending strips have seldom been reported before. According to the constant-force design principles of the bending strips obtained through simulations in previous paper, several prototypes were developed for experimental evaluation. This paper presents a proof of concept on the principles through experiments. The results show its availability as constant-force element for practical use.
Keywords: Constant-force, NiTi shape memory alloys, bending strips
DOI: 10.3233/JAE-162131
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1469-1475, 2016
Authors: Chen, Dezhi | Zhao, Wenliang | Bai, Baodong | Kwon, Byung-Il
Article Type: Research Article
Abstract: This paper presents the performance analysis and experiment of vibration and noise in transformer cores, considering the different magnetostriction influence of electrical steel sheets in the lamination rolling direction and perpendicular to this direction. Firstly, the magnetostrictive curves are obtained by the experimental test, which are utilized for the accurate setup in the finite element method (FEM). Then, the vibration and noise of a single phase power transformer are analyzed by FEM. Finally, the simulation results are verified by the experimental results under the DC bias.
Keywords: Vibration and noise, magnetostriction influence, transformer, finite element method, DC bias
DOI: 10.3233/JAE-162105
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1477-1484, 2016
Authors: Kim, Taeyoung | Jeong, Inhyuck | Kim, Dukjin | Kim, Byungtaek
Article Type: Research Article
Abstract: In this paper, the air gap flux density distribution of a surface PM vernier motor are analytically investigated, and principles of torque production are explained by not using lumped electrical circuit parameters but using magnetic quantities. To these ends, the equations of magnetic field waves, stored energy and torque are derived. The obtained equations are compared to those of a conventional PM machine, which shows that the vernier motor has substantially different characteristics of energy and peak flux densities in the core parts as well as air gap. Finally the design guides for vernier motor design to avoid saturation of …core material are presented and verified through FE analysis for a practical model. Show more
Keywords: Air gap flux density, field energy, saturation, vernier motor
DOI: 10.3233/JAE-162230
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1485-1493, 2016
Authors: Kurihara, Takeshi | Narita, Takayoshi | Kato, Hideaki | Yamamoto, Yoshio
Article Type: Research Article
Abstract: Thin steel plates are widely used in various industrial products. However, there are problems where deterioration of surface quality and metal plating occurred by transporting. As a solution to these problems, a noncontact transport of steel plate using electromagnetic force has been proposed. However, there is a risk that side slipping or the dropping of the plate may occur. Therefore we have proposed the addition of electromagnetic actuators to control the horizontal motion of levitated steel plate. In this study, a thin steel plate (0.24 mm thickness) was magnetically levitated, and we carried out transport experiments to discuss the effect …of a magnetic field from horizontal direction applied to the levitated steel plate on its elastic vibration. As a result, it is confirmed that the application of a magnetic field in the horizontal direction improves the levitation stability of transported thin steel plate. Show more
Keywords: Electromagnetic levitation control, thin steel plate, vibration control, magnetic field, transportation
DOI: 10.3233/JAE-162144
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1495-1502, 2016
Authors: Adachi, Takahito | Takahara, Kenji
Article Type: Research Article
Abstract: The purpose of this study is to analyse and to measure damping characteristics of a linear generator. The linear generator can convert any mechanical vibration to electric power. The damping characteristics of the linear generator change due to the changes of the connected resistance. Therefore, a linear generator can be used as a controllable damper. The viscous damping coefficients were calculated by a finite element method. The prototype linear generator was produced based on the simulation and its damping characteristics were measured. It was confirmed that the viscous damping coefficient was controlled by PWM signal. Furthermore, the charging characteristics were …measured when it mover was driven by constant vibration of amplitude 30 [mm] and frequency 3 [Hz]. It was conceivable that the proposed linear generator can be used as a generator or a controllable damper as necessary. Show more
Keywords: Linear generator, PWM signal, viscous damping coefficient, semi-active suspension
DOI: 10.3233/JAE-162166
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1503-1510, 2016
Authors: Wang, Li | Chen, Zhenmao
Article Type: Research Article
Abstract: Quantitative evaluation of crack profiles using Eddy Current Testing (ECT) signals often underestimates depth of a Stress Corrosion Crack (SCC) because of the crack complicated property, especially the conductivity property. In this paper, to improve reconstruction precision of crack depth, an SCC numerical model considering crack conductivity distribution is adopted. To solve the high-dimension optimization problem with multiple conductivity parameters, a hybrid inversion strategy combined Particle Swarm Optimization (PSO) algorithm with Powell direction acceleration method is proposed. Owing to overcoming local optimum and slow search speed in a high-dimension solution space of PSO algorithm, and solving the difficulty of initial …value selection for Powell direction acceleration method, the hybrid inversion strategy can improve SCC reconstruction accuracy and numerical stability. Results from simulated and measured ECT signals of several artificial SCCs demonstrate that the proposed strategy is effective to improve reconstruction precision of crack depth. Show more
Keywords: Eddy current testing, stress corrosion cracks, reconstruction, particle swarm optimization, high-dimension optimization, Powell direction acceleration method
DOI: 10.3233/JAE-162167
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1511-1517, 2016
Authors: Yamamoto, Takeshi | Matsuzawa, Shuhei | Ogawa, Shinnosuke | Ota, Tomohiro | Hirata, Katsuhiro
Article Type: Research Article
Abstract: Electromagnetic fluid shows a unique behavior as elongation and sharpening in electrostatic field. Especially the electromagnetic fluid in this research can be largely deformed in microscale without breakup or collapsing thanks to its very high viscosity. The technique can be applied to microscale structures or MEMS devices. However experimental approach to control the deformation is insufficient because it is very difficult to measure electrostatic stress and surface tension acting on electrostatic fluid during deformation. This research reveals its mechanism quantitatively by calculating the deformation of electromagnetic fluid with a proposed combined method of FEM and MPS (Moving Particle Semi-implicit).
Keywords: Electromagnetic fluid, combined method, FEM, MPS
DOI: 10.3233/JAE-162226
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1519-1524, 2016
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