Topic
Transfer function
About: Transfer function is a research topic. Over the lifetime, 14362 publications have been published within this topic receiving 214983 citations. The topic is also known as: system function & network function.
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TL;DR: In this article, simple transfer function models of chemical plant can be reduced to simple models using the method of moments, and three parameters of the simple model are obtained by matching the first three moments of the impulse response of the complex and simple models.
88 citations
Patent•
11 Apr 1991TL;DR: In this article, the amplitude and phase transfer function components of the portion of the cardiovascular system between the carotid and femoral arteries were determined by a hybrid electrical circuit model having at least three variable parameters.
Abstract: Apparatus for noninvasively monitoring cardiovascular system parameters of a living subject comprises means for sensing waveforms externally of the body of the subject above the carotid and femoral arteries, means for non-invasively calibrating and digitizing the pulse waveforms, and a digital signal processor having means for converting the digitized, calibrated pulse information by Fast Fourier Transform to first and second sets of harmonically related blood pressure components in the frequency domain, means for comparing corresponding ones of the components in the first and second harmonically related sets to determine amplitude and phase transfer function components of the portion of the cardiovascular system between the carotid and femoral arteries, means for simulating the portion of the system by a hybrid electrical circuit model having at least three variable parameters, means for determining corresponding amplitude and phase transfer function components of the hybrid model and for adjusting the variable parameters so as to substantially match the transfer functions of the model and the portion of the cardiovascular system, and means for determining cardiac output utilizing the adjusted parameters of the hybrid model and the calibrated pulse information.
88 citations
TL;DR: In this paper, a linear programming approach is proposed to tune fixed-order linearly parameterized controllers for stable LTI plants based on the shaping of the open-loop transfer function in the Nyquist diagram.
87 citations
TL;DR: In this paper, the modulus of the equivalent transfer function characterizes the spectral content of an estimate and may reveal subtle sampling properties of the design of a linear smoothness, which is useful for comparing different smoothers and for assessing the resolution capabilities of a data set.
Abstract: Frequency domain analysis is used to examine estimates from linear smoothers operating on realizations of random fields over space and/or time. The estimates are expressed in terms of the Fourier transforms of the dependent variable and of the smoother weights. The latter is referred to as the equivalent transfer function. The data do not need to be evenly spaced to perform this analysis. The modulus of the equivalent transfer function characterizes the spectral content of an estimate and may reveal subtle sampling properties of the design. Frequency domain bias calculations are useful for comparing different smoothers and for assessing the resolution capabilities of a data set. These methods are used to compare six one-dimensional smoothers and analyze a complex three-dimensional example using data from a satellite altimeter.
87 citations
TL;DR: In this paper, an instrumental variable method for continuous-time model identification is proposed for multiple input single output systems where the characteristic polynomials of the transfer functions associated with each input are not constrained to be identical.
87 citations