Results 41 to 50 of about 159,458 (294)

Investigating dynamics of machine tool spindles under operational conditions [PDF]

, 2011
Chatter is one of the major problems in machining and can be avoided by stability diagrams which are generated using frequency response functions (FRF) at the tool tip.
Budak, Erhan, Ozguven, Nevzat H., Ozsahin, Orkun, Özgüven, Nevzat H., Özşahin, Orkun   +4 more
core   +1 more source

Identification of critical transmission limits in injection impedance plane [PDF]

International Journal of Electrical Power & Energy Systems, 2012
Abstract In this paper, equations are derived that describe the mapping of critical boundaries and characteristic curves from the three dimensional PQV-surface into the two-dimensional injection impedance plane (load impedance plane for both positive and negative resistance).
Jóhannsson, Hjörtur, Østergaard, Jacob, Nielsen, Arne Hejde   +2 more
openaire   +2 more sources

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

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

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

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

Clinical Insights Into Hypercalcemia of Malignancy in Childhood

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Hypercalcemia of malignancy (HCM) is a rare but life‐threatening metabolic emergency in children that occurs in less than 1% of pediatric cancer cases, with a reported incidence ranging from 0.4% to 1.0% across different studies. While it is observed in 10%–20% of adult malignancies, pediatric HCM remains relatively uncommon.
Hüseyin Anıl Korkmaz
wiley   +1 more source

Bilateral Teleoperation With Autoelimination of Probing Signal for Environmental Impedance Identification Considering Operability

IEEE Open Journal of the Industrial Electronics Society
Environmental impedance recognition is important for abstracting human dexterous motion characteristics. One of the methods to abstract such beneficial information is bilateral teleoperation, which expresses the interaction between the human and the ...
Akira Takakura, Izumi Kotani, Kazuki Yane, Takahiro Nozaki   +3 more
doaj   +1 more source