Results 21 to 30 of about 43,346 (264)

Compound Damages Detection for Rotors by the Coupled Piezoelectric Impedance

IEEE Access, 2018
The rotor is a key component of rotating machinery, thus it is of great importance to quantitatively detect its damage. Since the sensitivity matrix in the impedance-based rotor damage identification model with a single piezoelectric transducer has lower
Yongfang Mao, Yi Qin, Aibing Zhang
doaj   +1 more source

Numerical and Experimental Analysis of the Effect of Acoustic Loads on the Source Characterization for an Internal Combustion Engine Exhaust System

IEEE Access, 2020
The identification of source characteristics, commonly characterized as the source strength and source impedance, is essential for predicting the acoustic performance of an internal combustion (IC) engine exhaust system.
Haitao Liu, Yonghua Chen, Qian Xiao
doaj   +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; id_orcid 0000-0002-9416-2857, Nielsen, Arne Hejde   +2 more
openaire   +1 more source

Impedance Spectroscopy Based on Linear System Identification

IEEE Transactions on Biomedical Circuits and Systems, 2019
Impedance spectroscopy is a commonly used measurement technique for electrical characterization of a sample under test over a wide frequency range. Most measurement methods employ a sine wave excitation generator, which implies a point-by-point frequency sweep and a complex readout architecture.
Nikola Ivanisevic, Saul Rodriguez 0001, Ana Rusu   +2 more
openaire   +4 more sources

Force, Impedance, and Trajectory Learning for Contact Tooling and Haptic Identification [PDF]

IEEE Transactions on Robotics, 2018
Humans can skilfully use tools and interact with the environment by adapting their movement trajectory, contact force, and impedance. Motivated by the human versatility, we develop here a robot controller that concurrently adapts feedforward force, impedance, and reference trajectory when interacting with an unknown environment.
Yanan Li 0001, Ganesh Gowrishankar, Nathanaël Jarrassé, Sami Haddadin, Alin Albu-Schäffer, Etienne Burdet   +5 more
openaire   +5 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

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

Normal mode identification for impedance boundary conditions [PDF]

The Journal of the Acoustical Society of America, 1983
When using the plane wave reflection coefficient (impedance condition) to represent bottom interaction for a normal mode calculation, counting the number of eigenfunction zeroes to identify normal modes is impractical. A method for identifying these modes by knowing the characteristics of the reflection coefficient is presented [R. A. Koch, P.
Robert A. Koch, Paul J. Vidmar, Jo B. Lindberg   +2 more
openaire   +1 more source

Prevalence of 21 Physician‐Defined Severe Toxicities Following Childhood Acute Lymphoblastic Leukemia Treatment: Australian Retrospective Cohort Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Acute lymphoblastic leukemia (ALL) is the most common pediatric cancer, with an overall survival now surpassing 90% in developed countries. However, treatments are not without adverse effects. In this study, we apply the severe toxicity‐free survival (STFS) framework to determine the prevalence of 21 physician‐defined severe ...
Lane Collier, Brittany Grantham, Camilla Grud Nielsen, Louise Lundgren, Liv Andrés‐Jensen, Kjeld Schmiegelow, Chris Selman, Gareth Ball, Elyse Passmore, David A. Elliott, Rachel Conyers   +10 more
wiley   +1 more source