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The ever increasing need for performance results in increasingly rigorous demands on throughput and positioning accuracy of high-precision motion systems, which often suffer from position dependent effects that originate from relative…

系统与控制 · 电气工程与系统科学 2023-02-08 Yorick Broens , Hans Butler , Roland Tóth

Flexible control of magnetization switching by electrical manners is crucial for applications of spin-orbitronics. Besides of a switching current that is parallel to an applied field, a bias current that is normal to the switching current…

材料科学 · 物理学 2016-11-30 X. Zhang , C. H. Wan , Z. H. Yuan , Q. T. Zhang , H. Wu , L. Huang , W. J. Kong , C. Fang , U. Khan , X. F. Han

We consider the quasi-static magnetic hysteresis model based on a dry-friction like representation of magnetization. The model has a consistent energy interpretation, is intrinsically vectorial, and ensures a direct calculation of the…

其他凝聚态物理 · 物理学 2018-07-04 Leonid Prigozhin , Vladimir Sokolovsky , John W. Barrett , Sergey E. Zirka

Controlling the magnetic state of two-dimensional (2D) materials is crucial for spintronic applications. By employing data-mining and autonomous density functional theory calculations, we demonstrate the switching of magnetic properties of…

Controlling a quantum system based on the observation of its dynamics is inevitably complicated by the backaction of the measurement process. Efficient measurements, however, maximize the amount of information gained per disturbance…

量子物理 · 物理学 2018-11-02 Massimiliano Rossi , David Mason , Junxin Chen , Yeghishe Tsaturyan , Albert Schliesser

Robots are increasingly being deployed not only in workplaces but also in households. Effectively execute of manipulation tasks by robots relies on variable impedance control with contact forces. Furthermore, robots should possess adaptive…

机器人学 · 计算机科学 2024-07-30 Yu Zhang , Long Cheng , Xiuze Xia , Haoyu Zhang

This paper presents a nonlinear control algorithm for speed control of a permanent magnet motor. The idea relies on a feedback linearization technique which also ensures adherence to current and voltage bounds. These bounds arise from…

系统与控制 · 电气工程与系统科学 2019-11-27 Shravan Mohan

We study the validity and limitations of a macrospin model to describe the voltage-controlled manipulation of ferromagnetic magnetization in nickel thin film/piezoelectric actuator hybrid structures. To this end, we correlate simultaneously…

材料科学 · 物理学 2012-04-24 A. Brandlmaier , M. Brasse , S. Geprägs , M. Weiler , R. Gross , S. T. B. Goennenwein

We developed a micromagnetic method for modeling magnetic systems with periodic boundary conditions along an arbitrary number of dimensions. The main feature is an adaptation of the Ewald summation technique for evaluation of long-range…

介观与纳米尺度物理 · 物理学 2015-10-30 Aleksander L. Wysocki , Vladimir P. Antropov

Media with engineered magnetization are essential building blocks in superconductivity, magnetism and magnon spintronics. However, the established thin-film and lithographic techniques insufficiently suit the realization of planar…

Many proposals for quantum information processing require precise control over the motion of neutral atoms, as in the manipulation of coherent matter waves or the confinement and localization of individual atoms. Patterns of micron-sized…

量子物理 · 物理学 2014-11-18 Benjamin Lev

Feedback control laws have been traditionally implemented in a periodic fashion on digital hardware. Although periodicity simplifies the analysis of the mismatch between the control design and its digital implementation, it also leads to…

最优化与控制 · 数学 2008-06-05 Adolfo Anta , Paulo Tabuada

Predictive control, which is based on a model of the system to compute the applied input optimizing the future system behavior, is by now widely used. If the nominal models are not given or are very uncertain, data-driven model predictive…

系统与控制 · 电气工程与系统科学 2023-03-09 Hoang Hai Nguyen , Maurice Friedel , Rolf Findeisen

Precise manipulation of liquid marbles has significant potential in various applications such as lab-on-a-chip systems, drug delivery, and biotechnology and has been a challenge for researchers. Ferrofluid marble (FM) is a marble with a…

This paper presents a novel framework to realize proprioception and closed-loop control for soft manipulators. Deformations with large elongation and large bending can be precisely predicted using geometry-based sensor signals obtained from…

机器人学 · 计算机科学 2023-09-26 Yinan Meng , Guoxin Fang , Jiong Yang , Yuhu Guo , Charlie C. L. Wang

In this paper, we provide a theoretical analysis of closed-loop properties of a simple data-driven model predictive control (MPC) scheme. The formulation does not involve any terminal ingredients, thus allowing for a simple implementation…

最优化与控制 · 数学 2024-12-04 Joscha Bongard , Julian Berberich , Johannes Köhler , Frank Allgöwer

For two decades, NdFeB based magnets have been a critical component in a range of electrical devices engaged in energy production and conversion. The magnet shape and the internal microstructure of the selected NdFeB grade govern their…

仪器与探测器 · 物理学 2016-11-17 J. Jacimovic , F. Binda , L. G. Herrmann , F. Greuter , J. Genta , M. Calvo , T. Tomse , R. A. Simon

Navigation problems under unknown varying conditions are among the most important and well-studied problems in the control field. Classic model-based adaptive control methods can be applied only when a convenient model of the plant or…

Data-driven control has gained significant attention in recent years, particularly regarding feedback linearization of nonlinear systems. However, existing approaches face limitations when it comes to implementing them on hardware. The main…

系统与控制 · 电气工程与系统科学 2023-07-13 Karthik Shenoy , Akshit Saradagi , Ramkrishna Pasumarthy , Vijaysekhar Chellaboina

This paper is concerned with the problem of Model Predictive Control and Rolling Horizon Control of discrete-time systems subject to possibly unbounded random noise inputs, while satisfying hard bounds on the control inputs. We use a…

最优化与控制 · 数学 2010-09-08 Peter Hokayem , Debasish Chatterjee , John Lygeros