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Academic literature on the topic 'Oscillations in digital filters'

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Published: 6 September 2023

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Journal articles on the topic "Oscillations in digital filters"

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Romaniuk, E. A., V. Yu Rumiantsev, Yu V. Rumiantsev, and A. A. Dziaruhina. "Reducing the Impact of the Frequency Change on the Formation of Orthogonal Components of the Relay Protection Input Signals." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 63, no. 1 (February 7, 2020): 42–54. http://dx.doi.org/10.21122/1029-7448-2020-63-1-42-54.

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Digital filters made with the use of discrete Fourier Transform are applied in most microprocessor protections produced both in the home country and abroad. When the input signal frequency deviates from the value to which these filters are configured, a signal is generated at their output with oscillation amplitude that is proportional to the deviation of the signal frequency from the specified one. The article proposes an algorithm for compensating the oscillations of orthogonal components of the output signals of digital filters implemented on the basis of a discrete Fourier transform, when the input signal frequency deviates from the nominal one. A mathematical model of the proposed digital filter with an algorithm for compensating the oscillations of its orthogonal components, as well as a signal model for reproducing input effects, is implemented in the MatLab-Simulink dynamic modeling environment. The digital filter model is provided with two channels, viz. a current channel and a voltage channel, which makes it possible to simulate their operation in relation to protections that use one or two input values, for example, for current and remote protection. Verification of the functioning of the digital filter model with compensation for fluctuations in its output signal was carried out with the use of two types of test effects, viz. a sinusoidal signal with a frequency of 48–51 Hz (idealized effect), and the effects that are close to the real secondary signals of measuring current transformers and voltage transformers in case of short circuits accompanied by a decrease in frequency. The conducted computational experiments with deviation of frequency from the nominal one, revealed the presence of undamped oscillations at the output of standard digital Fourier filters and their almost complete absence in the proposed digital filters. This makes us possible to recommend digital filters based on a discrete Fourier transform supplemented by an algorithm for compensation of fluctuations in the amplitudes of the output signals for the use in microprocessor protection.
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Agarwal, Neha, and Haranath Kar. "Overflow oscillation-free realization of digital filters with saturation." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 6 (November 5, 2018): 2050–66. http://dx.doi.org/10.1108/compel-10-2017-0449.

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Purpose The purpose of this paper is to establish a criterion for the global asymptotic stability of fixed-point state–space digital filters using saturation overflow arithmetic. Design/methodology/approach The method of stability analysis used in this paper is the second method of Lyapunov. The approach in this paper makes use of a precise upper bound of the state vector of the system and a novel passivity property associated with the saturation nonlinearities. Findings The presented criterion leads to an enhanced stability region in the parameter-space as compared to several existing criteria. Practical implications When dealing with the design of fixed-point state–space digital filters, it is desirable to have a criterion for selecting the filter coefficients so that the designed filter becomes free of overflow oscillations. The criterion presented in this paper provides enhanced saturation overflow stability region and therefore facilitates the designer greater flexibility in selecting filter parameters for overflow oscillation-free realization of digital filters. Originality/value The approach uses the structural properties of the saturation nonlinearities in a greater detail. The exploitation of upper bound of the system state vector together with a new passivity property of saturation nonlinearities is a unique feature of the present approach. The presented approach may lead to results not covered by several existing approaches.
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Bose, T., and M. Q. Chen. "Overflow oscillations in state-space digital filters." IEEE Transactions on Circuits and Systems 38, no. 7 (July 1991): 807–10. http://dx.doi.org/10.1109/31.135754.

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Pack, A. I., D. A. Silage, R. P. Millman, H. Knight, E. T. Shore, and D. C. Chung. "Spectral analysis of ventilation in elderly subjects awake and asleep." Journal of Applied Physiology 64, no. 3 (March 1, 1988): 1257–67. http://dx.doi.org/10.1152/jappl.1988.64.3.1257.

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We studied the periodicities of ventilation in elderly subjects using digital comb filtering. Two groups of subjects were studied, those with and without sleep apnea. Measurements were made in wakefulness, stage 1-2 sleep, and where possible in stage 3-4 sleep. For each of the digital filters we calculated the average power of the oscillatory output. To compare subject groups we first specifically determined the average power in the filter with the maximum output. The mean of this measurement was greater in elderly subjects with apnea compared with those without apnea, both during wakefulness and stage 1-2 sleep. In both groups of subjects the cycle time of the major ventilatory oscillations was on the order of 40-60 s. There was no difference in this cycle time between the two groups of subjects in wakefulness or stage 1-2 sleep. Thus, whereas similar oscillatory processes occur in subjects with and without apnea, it is the magnitude of the oscillation that differs between the two groups. These conclusions are supported by analysis of the output of individual filters of the digital comb filter. In both groups, stage 1-2 sleep produced significantly increased oscillations in ventilation. Both in wakefulness and stage 1-2 sleep, significantly greater periodicities occurred in the apneic compared with the nonapneic group. In the few subjects who had sufficient data in stage 3-4 sleep for spectral analysis, ventilatory oscillations were virtually absent in this state. Our data suggest that subjects who develop apnea during sleep have an increased propensity for periodic breathing even while awake.
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Ashwin, Peter, W. Chambers, and G. Petkov. "Lossless Digital Filter Overflow Oscillations; Approximation of Invariant Fractals." International Journal of Bifurcation and Chaos 07, no. 11 (November 1997): 2603–10. http://dx.doi.org/10.1142/s021812749700176x.

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We investigate second order lossless digital filters with two's complement overflow. We numerically approximate the fractal set D of points that iterate arbitrarily close to the discontinuity. For the case of eigenvalues of the associated linear map of the form eiθ with θ/π ∉ Q we present evidence that D has positive two dimensional Lebesgue measure. For θ/π ∈ Q we confirm that D has Lebesgue measure zero. As a by-product we get estimates of the exterior dimension of D. These results imply that if such filters are realized using finite-precision arithmetic then they will have a sizeable fraction of orbits that are periodic with high period overflows.
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Kar, Haranath, and Vimal Singh. "Elimination of overflow oscillations in digital filters employing saturation arithmetic." Digital Signal Processing 15, no. 6 (November 2005): 536–44. http://dx.doi.org/10.1016/j.dsp.2005.02.001.

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Parthipan, CG, and Priyanka Kokil. "Overflow oscillations free implementation of state-delayed digital filter with saturation arithmetic and external disturbance." Transactions of the Institute of Measurement and Control 42, no. 2 (August 21, 2019): 188–97. http://dx.doi.org/10.1177/0142331219865058.

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This paper presents a sufficient condition for exponential stability and confirms [Formula: see text] performance of state-delayed digital filters in the simultaneous existence of saturation arithmetic and external disturbance. The realization of limit-cycle free state-space digital filters is carried out by utilizing better characterization of saturation nonlinearities. The presented criterion not only ensures exponential stability but also reduces effect of external interference to a specific attenuation level. The obtained condition is in linear matrix inequality framework, so it is easily tractable. It is also shown that many results reported in literature may be retrieved as a special case from the proposed condition. With the help of numerical examples, it is shown that the presented approach provides enhanced stability region for the digital filters as compared to an existing criterion appeared in literature.
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Kaszkurewicz, E., A. Bhaya, T. Bose, and M. Q. Chen. "Comments on "Overflow oscillations in state-space digital filters" [with reply]." IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing 39, no. 9 (September 1992): 675–77. http://dx.doi.org/10.1109/82.193325.

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Fernando, J. S., and M. D. Ercegovac. "A method of eliminating oscillations in high-speed recursive digital filters." IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing 44, no. 10 (1997): 861–64. http://dx.doi.org/10.1109/82.633446.

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Kumar, Mani Kant, and Haranath Kar. "Analysis of Memory Effects in Digital Filters with Overflow Arithmetic." Indonesian Journal of Electrical Engineering and Computer Science 7, no. 3 (September 1, 2017): 755. http://dx.doi.org/10.11591/ijeecs.v7.i3.pp755-760.

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<p>This paper deals with the problem of undesired memory effects in nonlinear digital<br />filters owing to the influence of past excitations on future outputs. The nonlinearities under consideration cover the usual types of overflow arithmetic employed in practice. Based on the Hankel norm performance, a new criterion is proposed to ensure the reduction of undesired memory effects in digital filters with overflow arithmetic. In absence of external input, the nonexistence of overflow oscillations is also confirmed by the proposed criterion. A numerical example together with simulation result showing the effectiveness of the criterion is given.</p>
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Dissertations / Theses on the topic "Oscillations in digital filters"

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Mackle, John. "Integrated digital filters." Thesis, Queen's University Belfast, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334588.

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Hicks, William T. "MEDIAN FILTERS." International Foundation for Telemetering, 2006. http://hdl.handle.net/10150/604155.

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ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California
Most modern digital filtering is done by taking the average (mean) of a signal or some weighted average. Another method is to use feedback, which more closely resembles how analog filters with feedback operate. In the case of low pass filters, all these methods tend to give a trade off in getting the signal to pass while attenuating the higher frequency noise. An alternative is to use a median filter, which selects the mid value of a group of points. While this is not as computationally simple as other filters, it allows for the attenuation of noise while allowing sudden changes in signal level to pass thru unaltered. This paper discusses the characteristics of median filters and methods of implementing them.
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Karlsson, Magnus. "Implementation of digital-serial filters /." Linköping : Dept. of Electrical Engineering, Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-3520.

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Walls, Kirsty. "Nanophotonic filters for digital imaging." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4514/.

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There has been an increasing demand for low cost, portable CMOS image sensors because of increased integration, and new applications in the automotive, mobile communication and medical industries, amongst others. Colour reproduction remains imperfect in conventional digital image sensors, due to the limitations of the dye-based filters. Further improvement is required if the full potential of digital imaging is to be realised. In alternative systems, where accurate colour reproduction is a priority, existing equipment is too bulky for anything but specialist use. In this work both these issues are addressed by exploiting nanophotonic techniques to create enhanced trichromatic filters, and multispectral filters, all of which can be fabricated on-chip, i.e. integrated into a conventional digital image sensor, to create compact, low cost, mass produceable imaging systems with accurate colour reproduction. The trichromatic filters are based on plasmonic structures. They exploit the excitation of surface plasmon resonances in arrays of subwavelength holes in metal films to filter light. The currently-known analytical expressions are inadequate for optimising all relevant parameters of a plasmonic structure. In order to obtain arbitrary filter characteristics, an automated design procedure was developed that integrated a genetic algorithm and 3D finite-difference time-domain tool. The optimisation procedure's efficacy is demonstrated by designing a set of plasmonic filters that replicate the CIE (1931) colour matching functions, which themselves mimic the human eye's daytime colour response. The best designs were fabricated and demonstrated a least-mean-square error, in comparison to the desired colour matching functions, of 6.37*10^3, 2.34*10^3 and 11.10*10^3 for the red, green, and blue filters respectively. Notably the spectrum for the red filter contained a double peak, as present in the corresponding colour matching function. Such dual peak behaviour cannot be achieved using a single current dye-based filter. The filters retain the same layer thickness for all structures so they can be defined in a single lithography step. A new approach to enable the fabrication of a multispectral filter array on a CMOS imager is also presented. This combines a Fabry-Perot filter with effective medium theory (EMT) to enable the fabrication of multiple filters in a single cavity length via lithographic tuning of the filter passband. Two approaches are proposed; air-filled nanostructures and dielectric backfilled nanostructures. The air-filled approach is demonstrated experimentally producing three filters with FWHM of 60 - 64 nm. Using the backfilled design, and incorporating a highindex cavity material, a set of twenty three narrowband filters, with a FWHM of 22 - 46nm is demonstrated. A virtual image reproduction process was developed to quantify the image reproduction performance of both the plasmonic and Fabry-Perot filter sets. A typical rgb dye-based filter set used in conventional imagers achieves a mean colour error of 2.711, whereas the experimental data from the plasmonic filters achieves an error of 2.222 which demonstrated a slight improvement in colour reproduction. The multispectral filter set developed in this work performed even better, with 4 filters giving an error of 0.906, 10 filters an error of 0.072 and continued improvement in the colour error reaching 0.047 for 23 filters. All the filter sets proposed are fully compatible with the CMOS process so as to enable direct integration onto CMOS image sensors in industrial foundries in future. The performance of the presented filters also suggest new compact applications in art reproduction, agricultural monitoring and medical imaging.
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El-Feghi, Idris S. "Design of three-dimensional digital filters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0013/MQ52542.pdf.

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Gustafsson, Oscar. "Contributions to low-complexity digital filters /." Linköping : Univ, 2003. http://www.bibl.liu.se/liupubl/disp/disp2003/tek837s.pdf.

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Bolton, Alan Graham. "Digital filters and cascade control compensators /." Title page, contents and abstract only, 1990. http://web4.library.adelaide.edu.au/theses/09PH/09phb694.pdf.

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詹文達 and Man-tat Jimmy Tsim. "High speed realisation of digital filters." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B31208939.

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Okullo-Oballa, Thomas Samuel. "Systolic realization of multirate digital filters." Thesis, [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12433998.

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Tsim, Man-tat Jimmy. "High speed realisation of digital filters /." [Hong Kong] : University of Hong Kong, 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12374088.

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Books on the topic "Oscillations in digital filters"

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Schlichthärle, Dietrich. Digital Filters. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-14325-0.

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Schlichthärle, Dietrich. Digital Filters. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04170-3.

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Taylor, Fred J. Digital Filters. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118141151.

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Hamming, R. W. Digital filters. Mineola, N.Y: Dover Publications, 1998.

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Hamming, R. W. Digital filters. 3rd ed. Englewood Cliffs, N.J: Prentice Hall, 1989.

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Hamming, R. W. Digital filters. 3rd ed. Englewood Cliffs, N.J: Prentice Hall, 1989.

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Kovačević, Branko, Zoran Banjac, and Milan Milosavljević. Adaptive Digital Filters. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33561-7.

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Pitas, I., and A. N. Venetsanopoulos. Nonlinear Digital Filters. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-6017-0.

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Designing digital filters. Englewood Cliffs, N.J: Prentice-Hall, 1986.

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Kovačević, Branko. Adaptive Digital Filters. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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Book chapters on the topic "Oscillations in digital filters"

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Tretter, Steven A. "Digital Filters." In Communication System Design Using DSP Algorithms, 29–49. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-9763-3_3.

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Cook, Mike. "Digital Filters." In Arduino Music and Audio Projects, 399–423. Berkeley, CA: Apress, 2015. http://dx.doi.org/10.1007/978-1-4842-1721-4_16.

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Berghaus, Donald. "Digital Filters." In Numerical Methods for Experimental Mechanics, 141–74. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1473-2_5.

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Terrell, Trevor J., and Lik-Kwan Shark. "Digital Filters." In Digital Signal Processing, 208–55. London: Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-13735-0_4.

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Tretter, Steven A. "Digital Filters." In Communication System Design Using DSP Algorithms, 75–107. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4613-0229-2_3.

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Frerking, Marvin E. "Digital Filters." In Digital Signal Processing in Communication Systems, 152–211. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4757-4990-8_5.

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Karrenberg, Ulrich. "Digital filters." In Signals, Processes, and Systems, 317–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38053-2_10.

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Williamson, Darrell. "Digital Filters." In Advanced Textbooks in Control and Signal Processing, 123–211. London: Springer London, 1999. http://dx.doi.org/10.1007/978-1-4471-0541-1_3.

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Marković, Dejan, Robert W. Brodersen, Rashmi Nanda, and Borivoje Nikolić. "Digital Filters." In DSP Architecture Design Essentials, 111–43. Boston, MA: Springer US, 2012. http://dx.doi.org/10.1007/978-1-4419-9660-2_7.

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He, Lingsong, and Bo Feng. "Digital Filters." In Fundamentals of Measurement and Signal Analysis, 161–88. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6549-4_6.

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Conference papers on the topic "Oscillations in digital filters"

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Rani, Pooja, and Haranath Kar. "l2–l∞ Elimination of overflow oscillations in interfered digital filters with saturation arithmetic." In 2017 4th International Conference on Power, Control & Embedded Systems (ICPCES). IEEE, 2017. http://dx.doi.org/10.1109/icpces.2017.8117614.

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Gang Li, Chunru Wan, and Xiongxiong He. "Digital filter realizations absent of self-sustained oscillations." In 2008 IEEE International Symposium on Circuits and Systems - ISCAS 2008. IEEE, 2008. http://dx.doi.org/10.1109/iscas.2008.4542006.

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Hinamoto, Takao, and Osemekhian I. Omoifo. "3-D Separable-Denominator Digital Filters with Minimum L2-Sensitivity and No Overflow Oscillations." In 2006 International Symposium on Intelligent Signal Processing and Communications. IEEE, 2006. http://dx.doi.org/10.1109/ispacs.2006.364754.

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Zhu, Guangxin, and Chaogeng Huang. "An low implementation complexity digital filter without self-sustained oscillations." In 2010 International Conference on Green Circuits and Systems (ICGCS). IEEE, 2010. http://dx.doi.org/10.1109/icgcs.2010.5543090.

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Raj, Krishna, and M.M.M.E.C. "Detection and correction of limit cycle oscillations in second -order recursive digital filter." In Signal Processing with Special Track on Biomedical Engineering (CCSP). IEEE, 2005. http://dx.doi.org/10.1109/ccsp.2005.4977156.

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Zaycev, Valeriy, and Alalvan Kasim. "NON-LINEAR OSCILLATORS IN DISCRETE TIME: ANALYSIS AND SYNTHESIS OF DYNAMIC SYSTEMS." In CAD/EDA/SIMULATION IN MODERN ELECTRONICS 2021. Bryansk State Technical University, 2021. http://dx.doi.org/10.30987/conferencearticle_61c997ef87b033.35809465.

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A physically justified method of synthesis of nonlinear oscillating systems oscillating in discrete time (DT) is proposed. Synthesized dynamic systems are used as nonlinear discrete (digital) filters and basic models of radio system elements.
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Ousterhout, Karl B. "Development of a Recursive Frequency Based Filter With Application to Chatter Control." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0234.

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Abstract In most machining processes, large amounts of energy are needed to accomplish the machining operation. When this energy is transmitted through a structure that has minimal damping characteristics, such as a lathe or a milling machine, self sustained oscillations (chatter) can develop. When chatter develops, it can be viewed as a basic performance limitation of the machine tool. In order to suppress the chatter, a real-time controller using digital signal processing techniques has been implemented. This paper discusses a novel way of computing the transfer function of the machine tool-work piece combination and illustrates how a real-time active chatter controller could be designed and integrated into existing machine tools to overcome this performance limitation. Currently, experimental verification of the analytical work is being pursued.
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Holst, Gerald C. "Digital Median Filters." In 1988 Los Angeles Symposium--O-E/LASE '88, edited by H. M. C. Liaw. SPIE, 1988. http://dx.doi.org/10.1117/12.944282.

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"Session: digital filters." In 1988 IEEE International Symposium on Information Theory. IEEE, 1988. http://dx.doi.org/10.1109/isit.1988.22294.

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"B3L-C Digital Filters." In 2008 15th IEEE International Conference on Electronics, Circuits and Systems. IEEE, 2008. http://dx.doi.org/10.1109/icecs.2008.4675167.

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Reports on the topic "Oscillations in digital filters"

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Willson, Jr, and Alan N. Programmable Linear Phase Digital Filters. Fort Belvoir, VA: Defense Technical Information Center, September 1993. http://dx.doi.org/10.21236/ada270413.

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Sinclair, Samantha, and Sally Shoop. Automated detection of austere entry landing zones : a “GRAIL Tools” validation assessment. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45265.

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The Geospatial Remote Assessment for Ingress Locations (GRAIL) Tools software is a geospatial product developed to locate austere entry landing zones (LZs) for military aircraft. Using spatial datasets like land classification and slope, along with predefined LZ geometry specifications, GRAIL Tools generates binary suitability filters that distinguish between suitable and unsuitable terrain. GRAIL Tools combines input suitability filters, searches for LZs at user‐defined orientations, and plots results. To refine GRAIL Tools, we: (a) verified software output; (b) conducted validation assessments using five unpaved LZ sites; and (c) assessed input dataset resolution on outcomes using 30 and 1‐m datasets. The software was verified and validated in California and the Baltics, and all five LZs were correctly identified in either the 30 or the 1‐m data. The 30‐m data provided numerous LZs for consideration, while the 1‐m data highlighted hazardous conditions undetected in the 30‐m data. Digital elevation model grid size affected results, as 1‐m data produced overestimated slope values. Resampling the data to 5 m resulted in more realistic slopes. Results indicate GRAIL Tools is an asset the military can use to rapidly assess terrain conditions.
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Beckman, Ivan. Development of alternative air filtration materials and methods of analysis. Engineer Research and Development Center (U.S.), June 2023. http://dx.doi.org/10.21079/11681/47188.

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Development of high efficiency particulate air (HEPA) filters demonstrate an effort to mitigate dangerous aerosol hazards at the point of production. The nuclear power industry installs HEPA filters as a final line of containment of hazardous particles. An exploration of analytical, experimental, computational, and machine learning models is presented in this dissertation to advance the science of air filtration technology. This dissertation studies, develops, and analyzes alternative air filtration materials and methods of analysis that optimize filtration efficiency and reduce resistance to air flow. Alternative nonwoven filter materials are considered for use in HEPA filtration. A detailed review of natural and synthetic fibers is presented to compare mechanical, thermal, and chemical properties of fibers to desirable characteristics for air filtration media. Digital replication of air filtration media enables coordination among experimental, analytical, machine learning, and computational air filtration models. The value of using synthetic data to train and evaluate computational and machine learning models is demonstrated through prediction of air filtration performance, and comparison to analytical results. This dissertation concludes with discussion on potential opportunities and future work needed in the continued effort to advance clean air technologies for the mitigation of a global health and safety challenge.
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