Results 31 to 40 of about 158,369 (273)

Research on adaptive impedance control technology of upper limb rehabilitation robot based on impedance parameter prediction

Frontiers in Bioengineering and Biotechnology
Introduction: With the aggravation of aging and the growing number of stroke patients suffering from hemiplegia in China, rehabilitation robots have become an integral part of rehabilitation training.
Yuling Zhang, Yuling Zhang, Tong Li, Tong Li, Haoran Tao, Haoran Tao, Fengchen Liu, Fengchen Liu, Bingshan Hu, Bingshan Hu, Minghui Wu, Hongliu Yu, Hongliu Yu   +12 more
doaj   +1 more source

Identification of an inclusion in multifrequency electric impedance tomography [PDF]

Communications in Partial Differential Equations, 2016
The multifrequency electrical impedance tomography is considered in order to image a conductivity inclusion inside a homogeneous background medium by injecting one current. An original spectral decomposition of the solution of the forward conductivity problem is used to retrieve the Cauchy data corresponding to the extreme case of perfect conductor ...
Ammari, Habib, Triki, Faouzi
openaire   +3 more sources

Leg Locomotion Adaption for Quadruped Robots with Ground Compliance Estimation

Applied Bionics and Biomechanics, 2020
Locomotion control for quadruped robots is commonly applied on rigid terrains with modelled contact dynamics. However, the robot traversing different terrains is more important for real application.
Songyuan Zhang, Hongji Zhang, Yili Fu
doaj   +1 more source

Damage Identification in Plate Structures Using Sparse Regularization Based Electromechanical Impedance Technique

Sensors, 2020
This paper proposes a novel structural damage quantification approach using a sparse regularization based electromechanical impedance (EMI) technique. Minor structural damage in plate structures by using the measurement of only a single surface bonded ...
Xingyu Fan, Jun Li
doaj   +1 more source

A Power Coordinated Control Method for Islanded Microgrids Based on Impedance Identification

Energies
Droop control is an effective power regulation method for islanded microgrids to cope with fluctuations in renewable energy and loads. However, its power coordination performance is easily affected by the line impedance.
Yifan Wang, Shaohua Sun, Zhenwei Li, Runxin Yan, Ruifeng Xiao   +4 more
doaj   +1 more source

Analysis of Ultrasonic Machining Characteristics under Dynamic Load

Sensors, 2022
This research focuses on the load characteristics of piezoelectric transducers in the process of longitudinal vibration ultrasonic welding. We are primarily interested in the impedance characteristics of the piezoelectric transducer during loading, which
Zhangping Chen, Xinghong Zhao, Shixing Chen, Honghuan Chen, Pengfei Ni, Fan Zhang   +5 more
doaj   +1 more source

Writing Electronic Devices on Paper with Carbon Nanotube Ink [PDF]

, 2009
The normal paper used in any printer is among the cheapest flexible organic materials that exist. We demonstrate that we can print on paper high-frequency circuits tunable with an applied dc voltage.
D Dragoman, E Flahaut, M Al Ahmad, M Dragoman, R Plana, Song J-W   +5 more
core   +4 more sources

Online identification of stability region for large-scale wind farms, Part I: Clustering based piecewise affine impedance modeling

International Journal of Electrical Power & Energy Systems
The online assessment of the small-signal stability of wind farms faces challenges in accurately identifying impedance due to the unknown structure and parameters of wind turbine generators.
Jia Luo, Peng Wang, Haoran Zhao, Chenxinwei Yuan, Tiancheng Liu, Vladimir Terzija   +5 more
doaj   +1 more source

Probabilistic Neural Network and Fuzzy Cluster Analysis Methods Applied to Impedance-Based SHM for Damage Classification

Shock and Vibration, 2014
Impedance-based structural health monitoring technique is performed by measuring the variation of the electromechanical impedance of the structure caused by the presence of damage.
Lizeth Vargas Palomino, Valder Steffen, Roberto Mendes Finzi Neto   +2 more
doaj   +1 more source

Smart Bio-Impedance-Based Sensor for Guiding Standard Needle Insertion

Sensors, 2022
A venipuncture is the most common non-invasive medical procedure, and is frequently used with patients; however, a high probability of post-injection complications accompanies intravenous injection.
Ivan Kudashov, Sergey Shchukin, Mugeb Al-harosh, Andrew Shcherbachev   +3 more
doaj   +1 more source