Results 31 to 40 of about 5,073,723 (195)

A review on optical torques: from engineered light fields to objects

Opto-Electronic Science
In recent decades, optical micro/nano manipulation has made remarkable strides in the fields of biology and the physical sciences, benefiting from both theoretical and experimental advances in optical forces.
Tao He, Jingyao Zhang, Din Ping Tsai, Junxiao Zhou, Haiyang Huang, Weicheng Yi, Zeyong Wei, Yan Zu, Qinghua Song, Zhanshan Wang, Cheng-Wei Qiu, Yuzhi Shi, Xinbin Cheng   +12 more
doaj   +1 more source

Research on the effects of double arc oil groove parameters on oil film torque in hydro-viscous drive

Advances in Mechanical Engineering, 2018
In order to study the influence of double arc oil groove parameters on oil film torque in hydro-viscous drive, the numerical simulation and parameterized analyzing platform were built. The flow field characteristics were carried out using CFX.
Hongwei Cui, Yuanyuan Deng, Zisheng Lian
doaj   +1 more source

Analysis of anthropometrics and mechanomyography signals as forearm flexion, pronation and supination torque predictors

Scientific Reports, 2022
This study aimed to analyze anthropometrics and mechanomyography (MMG) signals as forearm flexion, pronation, and supination torque predictors. 25 young, healthy, male participants performed isometric forearm flexion, pronation, and supination tasks from
Irsa Talib, Kenneth Sundaraj, Jawad Hussain, Chee Kiang Lam, Zeshan Ahmad   +4 more
doaj   +1 more source

The Cost of Assistance: High Prosthetic Knee Torque Reduces Biological Joint Work But Induces Symmetry Tradeoffs in Knee Power and Center-of-Mass Velocity During Stair Ascent

IEEE Transactions on Neural Systems and Rehabilitation Engineering
Stair ascent is a biomechanically demanding activity for individuals with transfemoral amputation, often requiring significant overreliance on the residual hip and sound biological joints to compensate for the lack of positive power in conventional ...
Clare Severe, Lukas Gabert, Grace Hunt, Gregory Stoddard, Tommaso Lenzi   +4 more
doaj   +1 more source

Research of two-phase excitation and stator winding mode of switched reluctance motor

Gong-kuang zidonghua, 2016
The paper took 4/6 poles three-phase switched reluctance motor and 6/8 poles four-phase switched reluctance motor as study objects, analyzed influence of winding structure and phase connection way of three-phase and four-phase switched reluctance motor ...
LIU Chengyao, PAN Zaiping
doaj   +1 more source

Extensions to reactive self-collision avoidance for torque and position controlled humanoids [PDF]

2011 IEEE International Conference on Robotics and Automation, 2011
One of the fundamental demands on robotic systems is a safe interaction with their environment. For fulfilling that condition, both collisions with obstacles and the own structure have to be avoided. We address the problem of self-collisions and propose an algorithm for its avoidance which is based on artificial repulsion potential fields and ...
Alexander Dietrich, Thomas Wimböck, Holger Täubig, Alin Albu-Schäffer, Gerd Hirzinger   +4 more
openaire   +1 more source

Positive YORP effect induced by lateral heat conduction in a crater

Astronomy & Astrophysics
The Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect plays an important role in the spin evolution of asteroids. Although craters are ubiquitous surface features, their influence on the YORP torque has received limited attention.
Qi Zehua, Zhang Yining, Li Hailiang, Xu Yangbo, Zhou Li-Yong   +4 more
doaj   +1 more source

Design and Implementation of Position-Based Repetitive Control Torque Observer for Cogging Torque Compensation in PMSM [PDF]

Applied Sciences, 2019
In permanent magnet machines, the cogging torque caused by reluctance variations in the air gap may degrade the speed control performance in low speed and will undoubtedly limit its operational range. In order to reduce the cogging torque, this paper proposes a position-based repetitive control observer aiming at cogging torque estimation and further ...
Chun-Ju Wu, Mi-Ching Tsai, Lon-Jay Cheng
openaire   +1 more source

Nonlinearity of Magnetostrictive Torque Sensor under Varying External Magnetic Field Strength

Current Directions in Biomedical Engineering, 2021
Correctly torquing bone screws is an important factor in achieving positive patient outcomes during orthopaedic surgery. A torque-limiting smart screwdriver concept has been proposed, and ongoing work is being undertaken to model the screwing process and
Wilkie Jack A., Moeller Knut
doaj   +1 more source

Base force/torque sensing for position based Cartesian impedance control [PDF]

2009 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2009
In this paper, a position based impedance controller (i.e. admittance controller) is designed by utilizing measurements of a force/torque sensor, which is mounted at the robot's base. In contrast to conventional force/torque sensing at the end-effector, placing the sensor at the base allows to implement a compliant behavior of the robot not only with ...
Christian Ott 0001, Yoshihiko Nakamura
openaire   +2 more sources