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Frequency response

About: Frequency response is a research topic. Over the lifetime, 25705 publications have been published within this topic receiving 332249 citations.


Papers
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Journal ArticleDOI
TL;DR: The design procedure is quite transparent, providing the designer with the insight to make necessary tradeoffs, at every step in the design process, based on frequency response concepts.
Abstract: There is given a minimum-phase plant transfer function, with prescribed bounds on its parameter values The plant is imbedded in a two-degree-of freedom feedback system, which is to be designed such that the system time response to a deterministic input lies within specified boundaries Subject to the above, the design should be such as to minimize the effect of sensor noise at the input to the plant This report presents a design procedure for this purpose, based on frequency response concepts The time-domain tolerances are translated into equivalent frequency response tolerances The latter lead to bounds on the loop transmission function in the form of continuous curves on the Nichols chart The properties of the loop transmission function which satisfy these bounds with minimum effect of sensor noise, are derived

457 citations

Journal ArticleDOI
TL;DR: In this article, a nonlinear model is used to account for the midplane stretching, a DC electrostatic force, and an ACharmonic force in the response of a resonant microbeam to an electric actuation.
Abstract: An investigation into the response of a resonant microbeam to anelectric actuation is presented. A nonlinear model is used to accountfor the mid-plane stretching, a DC electrostatic force, and an ACharmonic force. Design parameters are included in the model by lumpingthem into nondimensional parameters. A perturbation method, the methodof multiple scales, is used to obtain two first-order nonlinearordinary-differential equations that describe the modulation of theamplitude and phase of the response and its stability. The model and theresults obtained by the perturbation analysis are validated by comparingthem with published experimental results. The case of three-to-oneinternal resonance is treated. The effect of the design parameters on the dynamic responses isdiscussed. The results show that increasing the axial force improves thelinear characteristics of the resonance frequency and decreases theundesirable frequency shift produced by the nonlinearities. In contrast,increasing the mid-plane stretching has the reverse effect. Moreover,the DC electrostatic load is found to affect the qualitative andquantitative nature of the frequency-response curves, resulting ineither a softening or a hardening behavior. The results also show thatan inaccurate representation of the system nonlinearities may lead to anerroneous prediction of the frequency response.

452 citations

Journal ArticleDOI
TL;DR: In this article, the authors developed a band excitation (BE) SPM, which allows very rapid acquisition of the full frequency response at each point (i.e. transfer function) in an image and in particular enables the direct measurement of energy dissipation through the determination of the Q-factor of the cantilever-sample system.
Abstract: Mapping energy transformation pathways and dissipation on the nanoscale and understanding the role of local structure in dissipative behavior is a key challenge for imaging in areas ranging from electronics and information technologies to efficient energy production. Here we develop a family of novel scanning probe microscopy (SPM) techniques in which the cantilever is excited and the response is recorded over a band of frequencies simultaneously, rather than at a single frequency as in conventional SPMs. This band excitation (BE) SPM allows very rapid acquisition of the full frequency response at each point (i.e. transfer function) in an image and in particular enables the direct measurement of energy dissipation through the determination of the Q-factor of the cantilever–sample system. The BE method is demonstrated for force–distance and voltage spectroscopies and for magnetic dissipation imaging with sensitivity close to the thermomechanical limit. The applicability of BE for various SPMs is analyzed, and the method is expected to be universally applicable to ambient and liquid SPMs.

446 citations

Book
01 Jan 1983
TL;DR: The SYSKIT is a linear system software toolkit that contains a highly integrated set of programs with applications to system dynamics, controls and vibrations.
Abstract: From the Publisher: The SYSKIT is a linear system software toolkit that contains a highly integrated set of programs with applications to system dynamics,controls and vibrations. It includes file management,a time processor for eigenvalue and time response,a conversion module for vibrations,a frequency domain module for frequency response and root locus,and output display modules for time,frequency,and root locus data.

435 citations

Journal ArticleDOI
T. Inoue1, Michio Nakano1, T. Kubo, S. Matsumoto, H. Baba 
TL;DR: In this article, a linear feedback control is applied in high accuracy tracking of a periodic reference input by locating the imaginary poles of the controller's transfer function to suit the period of the input.

432 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023154
2022389
2021857
20201,105
20191,212
20181,152