Article
Engineering, Aerospace
Yuan-wen Zhang, Peng-lin Chen
Summary: Spacecraft electromagnetic docking has advantages of no propellant consumption and plume contamination, while providing high-precision, continuous, reversible, synchronous, and noncontacting control capabilities. However, there are strong dynamic nonlinearity and coupling, which are not friendly to controller design. This paper analyzes the symmetries and self-alignment capability of electromagnetic actuation, and solves the problem of self-attraction magnetic dipoles based on the theoretical derivation of nonlinear relative motion dynamic models. Numerical simulation cases are provided to verify these capabilities and dipole solutions.
Article
Engineering, Electrical & Electronic
Zeyi Zhang, Hongjun Zhang
Summary: This paper investigates a distance sensor for the zero-power PEMS system, proposing a symmetric Hall-effect-based sensor. The sensor is capable of eliminating the magnetic field excited by the current and outputting the magnetic field produced by the magnet to calibrate the floating distance. The simulation results demonstrate its excellent performance against the tilting angle and the lateral offset, while the experimental demonstration validates its functionality.
IEEE SENSORS JOURNAL
(2023)
Article
Automation & Control Systems
M. H. Ravichandran, Venkatakirthiga Murali, V. T. Sadasivan Achari, C. C. Joseph
Summary: Transverse flux motor (TFM) is proven to be the ideal choice for high-torque direct drive applications due to its higher specific torque density than conventional radial flux machines. This article investigates the suitability of TFM as the drive motor for precise position control in spacecraft applications. Surface mounted TFM (SM-TFM) outperforms competitors with lower power requirement and higher average torque, but with increased ripple content. Multiple parametric studies and configurations have been conducted to optimize the design for higher torque density.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Automation & Control Systems
Ta-Min Meng, Chia-Hsiang Menq
Summary: This article describes the design and development of an integrated system that enables ultra-precise and high-speed manipulation of a single magnetic scanning microprobe in aqueous solutions under a microscope. The system uses a six-input-three-output hexapole electromagnetic actuator for magnetic control and a three-dimensional vision-based motion tracking system for feedback control. The control system has three core functions that enhance the manipulation of the magnetic microprobe.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Electrical & Electronic
Gang Lv, Zhixuan Zhang, Yaqing Liu, Tong Zhou
Summary: This paper presents a linear synchronous motor integrated with propulsion, levitation, and guidance functions, and analyzes its 3-D force characteristics using a bilateral Fourier decomposition method. By calculating the force characteristics under different conditions and verifying the correctness of the theory, the results provide a certain reference value for electromagnetic design.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2021)
Article
Engineering, Multidisciplinary
Peng Xu, Hongming Zeng, Tengfei Qian, Lili Liu
Summary: A multi-frequency excitation composited electromagnetic detection method is proposed in this paper to comprehensively assess surface and near-surface defects on rails. Experimental analysis shows that this method can improve assessment accuracy and stability, and achieve quantitative assessment of buried defects.
Article
Engineering, Electrical & Electronic
Bo Feng, Kangxuan Deng, Lian Xie, Shuangnan Xie, Yihua Kang
Summary: This article studies a simple and efficient speed measurement method for smooth conductive specimens based on motion-induced eddy currents. The method uses a magnet and a Hall element to construct a speed sensor. When the conductor moves beneath the magnet, eddy currents are generated, and a secondary magnetic field is further generated, which is dependent on the moving speed of the conductor. The Hall element picks up this field to determine the relative speed between the conductor and the sensor.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Computer Science, Information Systems
Jedok Kim, Seungyoung Ahn
Summary: This paper proposes a dual loop reactive shield application to reduce leakage EMF and enhance power transfer efficiency in WPT systems. Experimental results demonstrate that the method effectively improves PTE and SE in both symmetric and asymmetric systems.
Article
Acoustics
Min Dai, Zi-Wei Zhang, Md Mehedi Hassan Dorjoy, Li Zeng
Summary: This paper aims to reduce the impact of vibration and noise generated by the motor in rock cotton centrifuges on the quality of the output fiber and the hearing of the operator. A high-speed magnetic suspension motor is proposed and optimized, showing reasonable noise levels while ensuring electromagnetic performance.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2022)
Article
Engineering, Electrical & Electronic
Dingyu Qin, Chongqing Jiao
Summary: The study explores the impact of loop radius and loop-to-loop distance on the shielding effectiveness in a magnetic shielding configuration. Results show clear effects when the distance is smaller than the loop radius, and conductive screens and magnetic screens exhibit contrasting and competing shielding behaviors. In some cases, the shielded loop-to-loop mutual inductance does not always decrease with distance, but peaks at a specific distance.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2022)
Article
Engineering, Electrical & Electronic
Rundong Yang, Wenze Pei, Yiqing Yang, Zhiquan Deng, Cong Peng
Summary: This paper proposes an FPGA-based QPLL method to observe the rotational speed of Magnetically Suspended High Speed Motor, so that the speed sensor can be cancelled. The proposed method achieves accurate frequency estimation, robustness to harmonic components and changes in input signal amplitude, and decouples from the vibration suppression controller, reducing system complexity and parameter design difficulty.
IEEE SENSORS JOURNAL
(2022)
Article
Computer Science, Artificial Intelligence
M. H. Ravichandran, Venkatakirthiga Murali, T. R. Haridas
Summary: This paper investigates various cogging torque mitigation techniques for the transverse flux motor (TFM) to be used as the drive motor for precise position control spacecraft requirements. The effectiveness of these techniques is studied on two hardware variants of the TFM.
TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
(2022)
Article
Chemistry, Physical
Na Liang, Yabin Sun, Xueliang Qin, Zixu Yin, Ge Tian, Dong Zhang, Bin Hu, Huijuan Yue, Shouhua Feng
Summary: A simple and feasible synthesis strategy was used to prepare Ni/N-doped two-dimensional carbon sheets, which were further combined with carbon nanotubes to fabricate forest-like three-dimensional structured composites. These composites showed excellent electromagnetic wave attenuation capabilities with tunable parameters such as impedance matching, interfacial polarization, dipole polarization, 3D conductive loss, and magnetic loss.
APPLIED SURFACE SCIENCE
(2021)
Article
Automation & Control Systems
Zhang Yuan-wen
Summary: Inter-spacecraft electromagnetic proximity operation offers numerous advantages, including high-precision control, reduced measurement requirements, and simplified docking controller design, by utilizing dynamic modeling and dynamics conservation analysis to derive specific evolvement laws of relative motion between actuated magnetic dipoles.
ASIAN JOURNAL OF CONTROL
(2021)
Article
Physics, Multidisciplinary
Xin-Bo Chu, Zuan-Ming Jin, Xu Wu, Jing-Nan Li, Yang Shen, Ruo-Yu Wang, Bing -Yu Ji, Zhang- Shu Li, Yan Peng
Summary: Under the illumination of a femtosecond laser pulse, a spin current can be generated in a Pt/CoFe/Ta trilayer heterostructure, leading to the emission of far-infrared radiation. Two experiments were conducted to investigate the modulation of far-infrared emission by photo-thermal effect and the control of spin polarization. The results demonstrate the photothermal effect of femtosecond laser pulses and provide a new method for controlling far-infrared radiation pulses based on ultrafast spintronics.
ACTA PHYSICA SINICA
(2023)
