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Several heuristic procedures to estimate the rotor position of permanent magnet synchronous motors (PMSM) via signal injection have been reported in the literature. Using averaging theory, a framework to analyse such schemes has been…

Systems and Control · Computer Science 2020-03-17 Bowen Yi , Slobodan N. Vukosavic , Romeo Ortega , Aleksandar M. Stankovic , Weidong Zhang

We report on the design and experimental characterization of a surface-electrode multipole ion trap. Individual microscopic sugar particles are confined in the trap. The trajectories of driven particle motion are compared with a theoretical…

Phase synchronization between the vortex shedding behind a two-dimensional circular cylinder and its vibrations is investigated using the phase-reduction analysis. Leveraging this approach enables the development of a one-dimensional,…

Fluid Dynamics · Physics 2021-03-24 M. A. Khodkar , Joseph T. Klamo , Kunihiko Taira

We propose a novel method to model hierarchical metrical structures for both symbolic music and audio signals in a self-supervised manner with minimal domain knowledge. The model trains and inferences on beat-aligned music signals and…

Sound · Computer Science 2023-01-26 Junyan Jiang , Gus Xia

In this work, we focus on the family of shell formulations referred to as "solid shells", where the simulation of shell-type structures is performed by means of a mesh of 3D solid elements, with typically only one element through the…

Numerical Analysis · Mathematics 2019-10-09 Pablo Antolin , Josef Kiendl , Marco Pingaro , Alessandro Reali

Using a combination of theory, experiment, and simulation, we revisit the dynamics of two coupled metronomes on a moving platform. Our experiments show that the platform's motion is damped by a dry friction force of Coulomb type, not the…

Adaptation and Self-Organizing Systems · Physics 2022-04-27 Guillermo H. Goldsztein , Lars Q. English , Emma Behta , Hillel Finder , Alice N. Nadeau , Steven H. Strogatz

We report the first measurement of the Spin Hall Effect of Light (SHEL) on an air-metal interface. The SHEL is a polarization-dependent out-of-plane shift on the reflected beam. For the case of metallic reflection with a linearly polarized…

Optics · Physics 2011-09-29 N. Hermosa , A. M. Nugrowati , Andrea Aiello , J. P. Woerdman

We study phase slips in one-dimensional topological superconducting wires. These wires have been proposed as building blocks for topologically protected qubits in which the quantum information is distributed over the length of the device…

Mesoscale and Nanoscale Physics · Physics 2013-03-05 David Pekker , Chang-Yu Hou , Doron L. Bergman , Sam Goldberg , İnanç Adagideli , Fabian Hassler

Nonlinear analysis of the phase-locked loop (PLL) based circuits is a challenging task, thus in modern engineering literature simplified mathematical models and simulation are widely used for their study. In this work the limitations of…

Other Computer Science · Computer Science 2016-11-15 G. Bianchi , N. V. Kuznetsov , G. A. Leonov , M. V. Yuldashev , R. V. Yuldashev

At the classical level anyons with harmonic confinement are known to exhibit two important properties namely partial separability and pseudo-integrability. These stem from the fact that this system is locally identical to isotropic…

Mathematical Physics · Physics 2007-05-23 G. Date

Mode-locking is a process in which different modes of an optical resonator establish, through nonlinear interactions, stable synchronization. This self-organization underlies light sources that enable many modern scientific applications,…

A mechanical system consisting of an elastic beam under harmonic excitation and an attached sliding body is investigated. Recent experimental observations suggest that the system passively (self-)adapts the axial location of the slider to…

Adaptation and Self-Organizing Systems · Physics 2021-01-12 Malte Krack , Noha Aboulfotoh , Jens Twiefel , Jörg Wallaschek , Lawrence A. Bergman , Alexander F. Vakakis

Analytical theory of large size intrinsic localized modes (ILMs) in anharmonic two-atomic chain is presented. It is shown that ILMs with frequencies close to the borders of phonon gap are govern by quartic anharmonicity while the effect of…

Materials Science · Physics 2017-12-05 Vladimir Hizhnyakov

Scattering-type scanning near-field optical microscopy (s-SNOM) enables sub-diffraction spectroscopy, featuring high sensitivity to small spatial permittivity variations of the sample surface. However, due to the near-field probe-sample…

Optics · Physics 2023-05-29 Dario Siebenkotten , Bernd Kaestner , Arne Hoehl , Shuhei Amakawa

An idealized 1:2 scale demonstrator and a numerical parameter optimization algorithm are proposed to closely reproduce the deformation shape and, thus, spatial strain directions of a real aerodynamically loaded civil aircraft spoiler using…

Computational Engineering, Finance, and Science · Computer Science 2021-11-02 Markus Winklberger , Christoph Kralovec , Martin Schagerl

Recently, correlated physics such as superconductivity and insulator at commensurate fractional electron fillings has been discovered in several different systems with Moire superlattice and narrow electron bands near charge neutrality.…

Strongly Correlated Electrons · Physics 2018-10-12 Chao-Ming Jian , Cenke Xu

It was recently shown in self-consistent Hartree-Fock calculations that a harmonically trapped dilute gas of fermionic atoms with a repulsive two-body interaction exhibits a pronounced {\it super-shell} structure: the shell fillings due to…

Other Condensed Matter · Physics 2009-11-11 M. Ogren , Y. Yu , S. Aberg , S. M. Reimann , M. Brack

A detailed study of the slow manifold of a model exhibiting mixed-mode oscillations is presented. A scenario for the emergence of mixed-mode states which does not involve phase locking on a 2-torus is constructed. We show that mixed-modes…

chao-dyn · Physics 2009-10-30 Andrei Goryachev , Peter Strizhak , Raymond Kapral

Mode-locking mechanisms are key resources in nonlinear optical phenomena, such as micro-ring solitonic states, and have transformed metrology, precision spectroscopy, and optical communication. However, despite significant efforts,…

The digital phase lock loop described in this paper has been in use on the Submillimeter Array (SMA) front-end receivers for over a decade and has been a key element in obtaining all of the high quality images that have been published from…

Instrumentation and Methods for Astrophysics · Physics 2015-03-17 Todd R. Hunter , Robert Kimberk , Patrick Steve Leiker , Cheuk-Yu Edward Tong , Robert W. Wilson