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Fourier Analysis and Response in the Frequency Domain
2004This chapter presents the application of Fourier series to determine: (1) the response of a system to periodic forces, and (2) the response of a system to nonperiodic forces in the frequency domain as an alternate approach to the usual analysis in the time domain.
Mario Paz, William Leigh
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Dynamic response analysis in the frequency domain
Earthquake Engineering & Structural Dynamics, 1993AbstractAnalysis in the frequency domain using discrete Fourier transforms is an efficient means of calculating the dynamic response of linear systems. In fact, for systems with frequency dependent parameters and also in those cases where the complex frequency response functions are more easily determined, frequency domain analysis may be the only ...
J. L. Humar, Hong Xia
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High‐frequency response analysis via algebraic substructuring
International Journal for Numerical Methods in Engineering, 2008AbstractHigh‐frequency response analysis (Hi‐FRA) of large‐scale dynamical systems is critical to predict the resonant behavior of modern micro‐devices and systems operated over MHz or GHz frequency range. Algebraic substructuring (AS) is a powerful technique to extract a large number of natural frequencies. In this work, we extend the AS technique for
Ko, Jin Hwan, Bai, Zhaojun
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Frequency Response Analysis of Power Transformers
2021Research has indicated that with increasing penetration of non-renewable energy sources, more and more high-frequency (HF) transformers are needed at the distribution level. Various new topologies have been proposed for this, one of them being solid-state transformers. HF transformers have also been proposed to be useful in micro-grids.
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Analysis of frequency response across switching
2012This chapter deals with systems with switching which occurs only once. For those systems, a method to analyze the gain from the sinusoidal input injected before switching to the output produced after switching is proposed. The obtained gain information will help us to design the frequency weighting functions used in synthesis of compensators to ...
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Frequency Response by Pulse Reduction for the Analysis of TRS Spectra
1994Biological systems can be analyzed by near infrared (NIR) spectroscopy in two ways: (1) A system can be characterized by studying its photon absorption and scattering as a lumped parameter system. A good example of this approach is the measurement of hemoglobin oxygen saturation (or other chromophore concentration) in an organ of the human body under ...
K A, Kang +3 more
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Frequency Distribution Analysis of the Normal Lymphocyte Response to Phytohemaggluitnin
Immunological Communications, 1974Phytohemagglutinin (PHA)-induced lymphocyte blastogenesls was used as an in vitro test for the immunocompetence of circulating thymus-dependent (T) lymphocytes. The data accumulated from a pool of normal individuals showed a wide range of responses and are presented here.
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Frequency analysis of the acoustical respiratory response.
Revista medico-chirurgicala a Societatii de Medici si Naturalisti din Iasi, 1989The frequency-domain analysis of respiration is used to put in evidence the respiratory reflexes, mainly the acoustical respiratory reflex. Based on the envelope of the spectrum, numerical parameters of the respiration are introduced and applied to determine respiratory patterns. The use of respirograms is also suggested.
H, Teodorescu +3 more
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