Article
Metallurgy & Metallurgical Engineering
Ting-song Yang, Yu-hang Bai, Yang Hai, Qi-fa Chen, Feng-shan Du
Summary: This study analyzed the roll profile electromagnetic control characteristics under different parameters and verified the accuracy of the model by establishing a finite element model and conducting experiments. The results indicate that the heterogeneity of ECR inner hole and ES have an impact on the roll crown, roll profile, and stress state during the RPECT process. A reasonable configuration of the heterogeneity between ECR inner hole and ES can increase the lifespan of ECR and maintain the control ability of RPECT.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
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
Automation & Control Systems
Tingsong Yang, Yingwei Wang, Jiayang Liu, Fengshan Du, Zhiqiang Xu
Summary: The study systematically investigates the characteristics of roll profile electromagnetic control technology under different conditions, providing a theoretical basis for predicting and calculating the electromagnetic control roll profile.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Yuta Takahashi, Hiraku Sakamoto, Shin-ichiro Sakai
Summary: A new controller is proposed in this study to simultaneously control electromagnetic force and torque, ensuring stable attitudes of multiple satellites and avoiding reaction wheel saturation. By combining EMFF kinematics with a simple unloading control, the accumulation of angular momentum in the system is eliminated.
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
(2021)
Article
Engineering, Aerospace
Chuang Liu, Xiaokui Yue, Jianqiao Zhang, Keke Shi
Summary: An active disturbance rejection control (ADRC) scheme is proposed for electromagnetic docking of spacecraft to handle time-varying delay, fault signals, external disturbances, and elliptical eccentricity. By introducing an intermediate observer (IO) and an auxiliary variable, the relative motion information and total disturbance can be estimated. The proposed ADRC scheme ensures convergence of relative position, relative velocity, and estimation errors. It has advantages in accuracy, robustness, and requirement of no prior knowledge.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Mechanical
Kirill V. Poletkin
Summary: This article derives formulas for calculating magnetic force and torque between two arbitrarily oriented circular filaments in space using Kalantarov-Zeitlin's method. The formulas are presented analytically through integral expressions, with the kernel function expressed in terms of elliptic integrals. They provide an alternative formulation to Babic's expressions and were validated through comparison with reference examples. Additional expressions for force and torque calculation were obtained by differentiating Grover's formula for mutual inductance, allowing comprehensive and independent verification of the derived new formulas.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Thermodynamics
Wenwen Liu, Ting Li, Tao Wang, Xiaobin Fu, Fengshan Du
Summary: RPECT is proposed to solve the problem of flatness control for cold-rolled strip processing. This paper establishes an electromagnetic thermal mechanical coupled axisymmetric model to research the effects of roll size on heat conversion and roll profile control. The research results show that increasing the roll diameter has little effect on induction heating efficiency, increases the average contact-stress, and decreases the roll crown. Additionally, the control ability of roll surface cooling on roll temperature, roll crown, and roll profile decreases. Therefore, the design of the roll used in RPECT should prioritize small roller diameter while meeting strength and stiffness requirements.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Automation & Control Systems
Tingsong Yang, Qifa Chen, Yanfeng Feng, Yang Hai, Fengshan Du
Summary: This paper introduces a new flexible and microscale roll gap control technology for stronger strip flatness control ability. Through experiments and simulations, it demonstrates the capability of achieving strip crown adjustment and stable roll profile control.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Automation & Control Systems
Lidong Yang, Moqiu Zhang, Zhengxin Yang, Li Zhang
Summary: Recent studies have developed various magnetic actuation systems for biomedical applications of magnetic microrobots; however, simultaneous actuation and tracking of these microrobots in a large workspace such as the human body size remains challenging. To address this, a parallel-mobile-coil system (PMCS) was proposed, using three electromagnetic coils that can move in a large 3D space. Three different control modes - torque control, force-assisted torque control, and force control - were designed to adapt the PMCS to different actuation scenarios or microrobot types. Comparative simulations and experiments validated the effectiveness of these control modes. Moreover, Hall-effect sensors were implemented to provide in-vivo feedback capability for 3D large-workspace actuation based on magnetic localization.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Electrical & Electronic
Hongfei Xiao, Han Peng, Xianchao Liu, Hanyi Sun
Summary: This article proposes a new approach of adopting hysteresis current control to realize maximum power point tracking and reduce current harmonics in inductor-less converter by using auxiliary coils. Experiments show that the designed prototype can obtain high output power with good overall efficiency in milli-power self-powered EVEH system.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Chemistry, Analytical
Shiming Mo, Xiaojun Jin, Chen Lin, Wei Zhang, Zhaobin Xu, Zhonghe Jin
Summary: This paper proposes a novel multi-satellite relative navigation scheme that achieves high-precision multi-satellite relative navigation by adopting a novel distributed multi-satellite range measurement scheme and an inter-satellite relative navigation algorithm.
Article
Engineering, Civil
Mengxiao Song, Danfeng Zhou, Peichang Yu, Yukai Zhao, Yichuan Wang, Yiqiu Tan, Jie Li
Summary: This paper derives an analytical calculation model for electromagnetic forces in SC EDS system and verifies it using experimental data. The results of the experiment confirm the effectiveness of the proposed calculation model.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Aerospace
Vladimir A. Grishin
Summary: This paper proposes a method to estimate the errors in measuring relative coordinates using a three-dimensional time-of-flight camera. The errors depend on the shape of the passive spacecraft, distance, observation angle, and camera parameters. The lower Cramer-Rao bound is used as an estimate.
JOURNAL OF SPACECRAFT AND ROCKETS
(2023)
Article
Computer Science, Information Systems
Maha Aldoumani, Baris Yuce, Dibin Zhu
Summary: This paper discusses the performance, modelling, and application of planar electromagnetic sensors, as well as the performance of various topologies in inductive sensing. Through experimentation and finite element modelling, an effective method for sensor development based on planar coils was found, and optimization was performed to improve performance.
Article
Chemistry, Multidisciplinary
Bangchao Liu, Youping Chen, Jingming Xie, Bing Chen
Summary: This paper proposes a new register control algorithm that improves the detection accuracy and compensation speed of printing register control systems. It introduces a new pulse-width subdivision detection algorithm and an optimized error compensation method, which greatly enhance the accuracy and speed of register error detection. The experimental results demonstrate the effectiveness of the proposed control approach and its applicability in the industrial field.
APPLIED SCIENCES-BASEL
(2023)
