Results 11 to 20 of about 134 (123)
Large‐scale system identification using self‐adaptive penguin search algorithm
IET Control Theory &Applications, Volume 17, Issue 17, Page 2292-2303, November 2023., 2023 This research addresses the non‐linear large‐scale system identification problem under the consideration of two systems: bilinear system and Volterra system as the large‐scale system identification. This work proposes a novel algorithm, called Self Adaptive Penguin Search Optimization (SAPeSO), to attain the system characteristics properly and minimize
Karthikeyan Udaichi +4 more
wiley +1 more source
Applicability Analysis of Inspection and Monitoring Technologies in Wind Turbine Towers
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 Wind turbines are one of the key systems in wind energy development. The wind tower supporting the whole wind turbine is a towering structure, which has been affected by installation, transportation, environment, and other factors. Furthermore, it is prone to experience other quality problems that would be difficult to detect for wind turbine towers ...
Yanchao Yue +7 more
wiley +1 more source
Système de contrôle novateur basé sur la technique UT TOFD
e-Journal of Nondestructive Testing, 2023 Du fait de ses nombreux avantages en termes de facilité de mise en oeuvre, de vitesse d’examen, de performances de détection et de caractérisation des indications, la technique de contrôle TOFD (Time of Flight Diffraction) est de plus en plus utilisée ...
Michel Cence, Weina Ke, Celia Chevallier
doaj +1 more source
Multi-Mode Total Focusing Method (MTFM) to Detect High-Temperature Hydrogen Attack (HTHA) – A Review
Journal of Materials Exploration and Findings, 2023 High temperature hydrogen attack (HTHA) is a commonly observed harm component in carbon steels exposed to high temperature and pressure in a hydrogen-rich environment. Hydrogen together with carbon responds to produce methane.
Anjar Oktikawati +2 more
doaj +1 more source
Research progress in ultrasonic testing for friction stir welding of aluminum alloy
Cailiao gongcheng, 2022 The defects in friction stir welding (FSW) of aluminum alloy, e.g., tunnel defect, lack of penetration (LOP) and kissing bond, are with complex shape and narrow gap by inappropriate welding parameters.
JIN Shijie, TIAN Xin, LIN Li
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Chinese Journal of Mechanical Engineering, 2022 The shallow subsurface defects are difficult to be identified and quantified by ultrasonic time-of-flight diffraction (TOFD) due to the low resolution induced by pulse width and beam spreading.
Xu Sun, Li Lin, Shijie Jin
doaj +1 more source
Materials & Design, 2021 Automated in-process Non-Destructive Testing (NDT) systems are rapidly gaining traction within the manufacturing industry as they reduce manufacturing time and costs.
Ehsan Mohseni +12 more
doaj +1 more source
Nuclear Engineering and Technology, 2017 During the fabrication process of reactor vessel head penetration (RVHP), the grain size of the tube material can be changed by hot or cold work and the inner side of the tube can also be shrunk due to welding outside of the tube. Several nonregular time-
Kyungcho Kim +5 more
doaj +1 more source
Multiframe Ultrasonic TOFD Weld Inspection Imaging Based on Wavelet Transform and Image Registration
Journal of Sensors, Volume 2018, Issue 1, 2018., 2018 TOFD (time of flight diffraction) is a kind of weld defect detection technology by using ultrasonic diffraction wave signal. Because the diffraction intensity is far less than ultrasonic echo wave intensity, thus, the noise contained in TOFD signal is fairly large, and the formed image is not clear enough.
Jiaxu Duan +5 more
wiley +1 more source
Tangential Homology for Defect Detection in the Time of Flight Diffraction Method (TOFD) [PDF]
PAMM, 2016 AbstractUltrasonic non‐destructive testing (NDT) techniques are widely used in industry to evaluate properties of a component, material or system without causing any damage. The time of flight diffraction method (TOFD) is regarded as a valuable procedure for the detection of welding defects.
Jose F. Cuenca +3 more
openaire +1 more source