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Measurement of Flat Samples With Rough Surfaces by Magnetic Adaptive Testing
IEEE Transactions on Magnetics, 2012Magnetic nondestructive tests of structural degradation of ferromagnetic construction materials must be often carried out on flat samples whose magnetic circuit is artificially closed by an attached soft magnetic yoke. Quality of magnetic contact between the sample surface and faces of the yoke has a strong influence on the measured signal, and ...
Ivan Tomas +2 more
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Magnetic Adaptive Testing of Non-magnetic Properties of Ferromagnetic Materials
Czechoslovak Journal of Physics, 2004A method of Magnetic Adaptive Testing (MAT) has been developed lately for optimized non-destructive detection and analysis of variation/degradation of non-magnetic features of ferromagnetic materials. Based on simple measurement of representative pools of magnetic hysteresis data, and on the fact that the inspected material degradation modifies the ...
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New parameters in adaptive testing of ferromagnetic materials utilizing magnetic Barkhausen noise
Journal of Magnetism and Magnetic Materials, 2016Abstract A new method of magnetic Barkhausen noise (MBN) measurement and optimization of the measured data processing with respect to non-destructive evaluation of ferromagnetic materials was tested. Using this method we tried to found, if it is possible to enhance sensitivity and stability of measurement results by replacing the traditional MBN ...
Jozef Pal’a, Elemír Ušák
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The Design and Implementation of Adaptive Noise Cancellation for Magnetic Flux Leakage Test Signal
Applied Mechanics and Materials, 2013In the application of magnetic flux leakage (MFL) nondestructive testing, the signal will be disturbed by varying noises. It seriously affects the accuracy of detection judgment result. This paper describes the design of least mean square (LMS) noise cancellation for MFL signal and the implementation based on ARM platform.
Xiao Gang Han, Mei Quan Liu, Qin Lei Sun
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Non-destructive magnetic adaptive testing of ferromagnetic materials
Journal of Magnetism and Magnetic Materials, 2004A simple way of measuring and processing of magnetic parameters, intended to optimize their ability to reflect mechanical and structural alterations of ferromagnetic materials is described here. The method is adaptive with respect to the investigated material and to the investigated structural alterations of the sample, as it always utilizes that ...
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Application of Fuzzy Adaptive PID Control in Magnetic Suspension Test Vehicle Model
2018 Chinese Automation Congress (CAC), 2018This paper takes the magnetic suspension test vehicle model as the research obj ect and establishes the dynamic model of single electromagnet. In order to overcome the large hysteresis caused by inductance change and improve the dynamic response performance, a current loop is added to the system.
Zhichao Zuo +3 more
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Multiple Sclerosis and Related Disorders, 2018
The Symbol Digit Modalities Test (SDMT) is widely used for cognitive evaluation of information processing speed (IPS), required in many cognitive operations. Despite being unspecific for different neurological disorders, it is sensitive to assess impaired performance related to stroke, Parkinson's disease, traumatic brain injury, and multiple sclerosis.
P H R, Silva +3 more
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The Symbol Digit Modalities Test (SDMT) is widely used for cognitive evaluation of information processing speed (IPS), required in many cognitive operations. Despite being unspecific for different neurological disorders, it is sensitive to assess impaired performance related to stroke, Parkinson's disease, traumatic brain injury, and multiple sclerosis.
P H R, Silva +3 more
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Journal of Magnetism and Magnetic Materials, 2007
Cold-rolled austenitic stainless-steel samples were non-destructively characterized by means of magnetic adaptive testing (MAT). The flat samples were magnetized by an attached yoke, and sensitive, reliable descriptors were obtained from the proper evaluation, based on the measurements of series of magnetic minor hysteresis loops, without magnetic ...
Vértesy, Gábor +2 more
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Cold-rolled austenitic stainless-steel samples were non-destructively characterized by means of magnetic adaptive testing (MAT). The flat samples were magnetized by an attached yoke, and sensitive, reliable descriptors were obtained from the proper evaluation, based on the measurements of series of magnetic minor hysteresis loops, without magnetic ...
Vértesy, Gábor +2 more
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Control Theory and Technology, 2014
Active magnetic bearings (AMBs) have found a wide range of applications in high-speed rotating machinery industry. The instability and nonlinearity of AMBs make controller designs difficult, and when AMBs are coupled with a flexible rotor, the resulting complex dynamics make the problems of stabilization and disturbance rejection, which are critical ...
Long Di, Zongli Lin
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Active magnetic bearings (AMBs) have found a wide range of applications in high-speed rotating machinery industry. The instability and nonlinearity of AMBs make controller designs difficult, and when AMBs are coupled with a flexible rotor, the resulting complex dynamics make the problems of stabilization and disturbance rejection, which are critical ...
Long Di, Zongli Lin
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Sophisticated software analysis of magnetic quantities obtained by magnetic adaptive testing method
AIP Conference Proceedings, 2023Lenka Hašková +2 more
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