Results 41 to 50 of about 484 (203)

Actuation Strategies for Underwater Jet‐Propelled Soft Robots

Journal of Field Robotics, EarlyView.
ABSTRACT This review article examines jet‐propulsion mechanisms in underwater soft robotic systems, focusing exclusively on physically fabricated and experimentally validated robots. Covering research published from 2013 to 2025, this study classifies and evaluates jet‐propulsion robots based on their actuation mechanisms.
Angel Kitone, Mohammed Anteet, Pawandeep S. Matharu, Yara Almubarak   +3 more
wiley   +1 more source

Research on Novel Direct Instantaneous Torque Control Strategy for Switched Reluctance Motor

IEEE Access, 2020
In order to solve the frequent problem of breaking shaft in the starter/generator system of switched reluctance motor, a novel Direct Instantaneous Torque Control (DITC) is proposed to control the torque ripple in this paper.
Shuanghong Wang, Zihui Hu, Xiupeng Cui
doaj   +1 more source

Slowly Rotating Traversable Wormholes Supported by Radially Varying String‐Fluid Matter: From Regular Geometries to Photon Trajectories

Annalen der Physik, Volume 538, Issue 6, June 2026.
This study examines slowly rotating traversable wormholes supported by string fluids whose properties change with radius. The matter smoothly shifts from a de Sitter‐like core to a string‐dominated exterior, producing a regular, horizon‐free spacetime.
A. Errehymy, B. Turimov, Meraj Ali Khan, S. Usanov, Z. Yasakov, Z. Avezmuratova   +5 more
wiley   +1 more source

Model Antiseptic Control Scheme to Torque Ripple Mitigation for DC-DC Converter-Based BLDC Motor Drives

Energies, 2022
Although brushless direct current motor (BLDCM) drives are becoming more popular in industrial and commercial applications, there are still significant difficulties and unresolved research issues that must be addressed.
Dileep Kumar, Surya Deo Choudhary, Md Tabrez, Afida Ayob, Molla Shahadat Hossain Lipu   +4 more
doaj   +1 more source

Robust Control Using a Matrix Converter to Enhance Wind Turbine Systems

Energy Science &Engineering, Volume 14, Issue 6, Page 2785-2815, June 2026.
This study uses a more efficient and effective solution to improve the operational performance of a wind turbine‐based power system. This system uses a doubly fed induction generator and relies on a matrix converter and fractional‐order proportional–integral controller.
Sihem Ghoudelbourk, Habib Benbouhenni, Adil Yahdou, Zakaria Mohamed Salem Elbarary, Nicu Bizon   +4 more
wiley   +1 more source

Automatic and real time phase advancing in BLDC motor by employing an electronic governor for a desired speed-torque/angle profile

e-Prime: Advances in Electrical Engineering, Electronics and Energy, 2023
When the BLDC motors speed increases, the shape of the current waveform changes in such a way that limits the production of motoring torque and increases torque ripple.
G.H. Raeisi Hasanhendoei, E. Afjei, M. Naseri, S. Azad   +3 more
doaj   +1 more source

Counting Degrees of Freedom: A Method Applicable From Scalars to f(Q)$f(\mathbb {Q})$ Gravity and Beyond

Fortschritte der Physik, Volume 74, Issue 6, June 2026.
ABSTRACT We present a clear, step‐by‐step method for counting degrees of freedom and identifying constraints in general field theories. This approach, grounded in the works of Einstein, Hilbert, Cartan, Kuranishi, and, more recently, Seiler, is neither Lagrangian nor Hamiltonian in nature. Instead, it applies directly to the field equations. We offer a
Lavinia Heisenberg
wiley   +1 more source

Modelagem pelo método de elementos finitos de servomotor CC sem escovas e seu acionamento [PDF]

, 2002
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.O presente trabalho aborda o estudo e a implementação da equação mecânica a um método de análise de máquinas elétricas ...
Antunes, Ricardo Luis Coltro
core  

Optimal Commutation for Switched Reluctance Motors using Gaussian Process Regression [PDF]

, 2022
Switched reluctance motors are appealing because they are inexpensive in both construction and maintenance. The aim of this paper is to develop a commutation function that linearizes the nonlinear motor dynamics in such a way that the torque ripple is ...
Witvoet, Gert, Witvoet, Gert (author), van Meer, Max, Oomen, Tom A.E., Oomen, T.A.E. (author), Oomen, T.A.E., van Meer, Max; id_orcid, Gert Witvoet, Max van Meer, Tom Oomen, Van Meer, Max (author)   +10 more
core   +1 more source

A Direct Torque Control Scheme With Integrated Commutation Torque Ripple Reduction for BLDC Motor Drives With Open-End Windings

IEEE Open Journal of Power Electronics
This article presents a direct torque control (DTC) scheme with an integrated switching strategy to reduce commutation torque ripple in a dual inverter-fed three-phase BLDC motor with open-end stator windings.
Hari Krishna U, Rajeevan P P
doaj   +1 more source