Topic
Frequency response
About: Frequency response is a research topic. Over the lifetime, 25705 publications have been published within this topic receiving 332249 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors introduced the concept of the complex mode indicator function (CMIF) and its application in spatial domain parameter estimation, which was developed by performing singular value decomposition (SVD) of the frequency response function (FRF) matrix at each spectral line.
224 citations
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TL;DR: A damping parameter estimation algorithm for dynamical systems based on the sine frequency response is proposed and a damping factor is introduced in the proposed iterative algorithm in order to overcome the singular or ill-conditioned matrix during the iterative process.
224 citations
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TL;DR: In this paper, the existence of low frequency gaps in Timoshenko beams with local resonators was investigated theoretically and experimentally, and it was shown that low frequency flexural vibration gap is indicated by the complex band structure calculated with transfer matrix theory for an infinite beam, as well as the frequency response function calculated with the finite element method for a finite Timoshenko beam with finite local resonance.
Abstract: Flexural vibration in Timoshenko beams with periodically attached local resonators is studied theoretically and experimentally. The existence of a low frequency flexural vibration gap is indicated by the complex band structure calculated with transfer matrix theory for an infinite beam, as well as the frequency response function calculated with the finite element method for a finite Timoshenko beam with finite local resonators. This finite Timoshenko beam was manufactured and vibration experiments generated an experimental frequency response function curve showing a vibration gap as expected. The existence of low frequency gaps in Timoshenko beams with local resonators provides a method of flexural vibration control of beams.
224 citations
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01 Jan 1986TL;DR: This book discusses linearized Dynamic Models, transfer function models of Physical Systems Modeling of Feedback Systems and Controllers, and Multivariable Systems in the Frequency Domain Nonlinear Control Systems.
Abstract: Introduction and Linearized Dynamic Models Transfer Function Models of Physical Systems Modeling of Feedback Systems and Controllers The Performance of Feedback Systems Introduction to Feedback System Design The Root Locus Method Frequency Response Analysis Frequency Response Design Digital Control Systems Digital Control System Analysis and Design State-Space Analysis Introduction to State-Space Design Multivariable Systems in the Frequency Domain Nonlinear Control Systems Appendix A: Vectors, Matrices, and Determinants Appendix B: Computer Aids for Analysis and Design References Index
221 citations
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TL;DR: This work shows that all studies of frequency stability report values several orders of magnitude larger than the limit imposed by thermomechanical noise, and proposes a new method to show this was due to the presence of frequency fluctuations, of unexpected level.
Abstract: Frequency stability is key to the performance of nanoresonators. This stability is thought to reach a limit with the resonator's ability to resolve thermally induced vibrations. Although measurements and predictions of resonator stability usually disregard fluctuations in the mechanical frequency response, these fluctuations have recently attracted considerable theoretical interest. However, their existence is very difficult to demonstrate experimentally. Here, through a literature review, we show that all studies of frequency stability report values several orders of magnitude larger than the limit imposed by thermomechanical noise. We studied a monocrystalline silicon nanoresonator at room temperature and found a similar discrepancy. We propose a new method to show that this was due to the presence of frequency fluctuations, of unexpected level. The fluctuations were not due to the instrumentation system, or to any other of the known sources investigated. These results challenge our current understanding of frequency fluctuations and call for a change in practices.
220 citations