Temat: bandwidth - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Bandwidth and power enhancement in the MEMS-based piezoelectric energy harvester using magnetic tip mass
Autorzy:: Anand, Ashutosh
Pal, Srikanta
Kundu, Sudip
Powiązania:: https://bibliotekanauki.pl/articles/2173519.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: vibration
piezoelectric energy harvester
magnetic tip mass
bandwidth
stress
wibracja
zbieracz energii piezoelektryczny
magnetyczna masa końcówki
przepustowość łącza
stres
Opis:: In this paper, the performance and frequency bandwidth of the piezoelectric energy harvester (PZEH) is improved by introducing two permanent magnets attached to the proof mass of a dual beam structure. Both magnets are in the vicinity of each other and attached in such a way to proof mass of a dual beam so that they create a magnetic field around each other. The generated magnetic field develops a repulsive force between the magnets, which improves electrical output and enhances the bandwidth of the harvester. The simple rectangular cantilever structure with and without magnetic tip mass has a frequency bandwidth of 4 Hz and 4.5 Hz, respectively. The proposed structure generates a peak voltage of 20 V at a frequency of 114.51 Hz at an excitation acceleration of 1 g (g= 9.8 m/s2 ). The peak output power of a proposed structure is 25.5 µW. The operational frequency range of a proposed dual beam cantilever with a magnetic tip mass of 30 mT is from 102.51 Hz to 120.51 Hz, i.e., 18 Hz. The operational frequency range of a dual beam cantilever without magnetic tip mass is from 104.18 Hz to 118.18 Hz, i.e., 14 Hz. There is an improvement of 22.22% in the frequency bandwidth of the proposed dual beam cantilever with a magnetic tip mass of 30 mT than the dual beam without magnetic tip mass.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e137509, 1--10
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: FPGA-based bandwidth selection for kernel density estimation using high level synthesis approach
Autorzy:: Gramacki, A.
Sawerwain, M.
Gramacki, J.
Powiązania:: https://bibliotekanauki.pl/articles/201258.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: FPGA
high level synthesis
kernel density estimation
bandwidth selection
plug-in selector
synteza wysokiego poziomu
jądrowy estymator gęstości
wybór pasma informacyjnego
Opis:: Field-programmable gate arrays (FPGA) technology can offer significantly higher performance at much lower power consumption than is available from single and multicore CPUs and GPUs (graphics processing unit) in many computational problems. Unfortunately, the pure programming for FPGA using hardware description languages (HDL), like VHDL or Verilog, is a difficult and not-trivial task and is not intuitive for C/C++/Java programmers. To bring the gap between programming effectiveness and difficulty, the high level synthesis (HLS) approach is promoted by main FPGA vendors. Nowadays, time-intensive calculations are mainly performed on GPU/CPU architectures, but can also be successfully performed using HLS approach. In the paper we implement a bandwidth selection algorithm for kernel density estimation (KDE) using HLS and show techniques which were used to optimize the final FPGA implementation. We are also going to show that FPGA speedups, comparing to highly optimized CPU and GPU implementations, are quite substantial. Moreover, power consumption for FPGA devices is usually much less than typical power consumption of the present CPUs and GPUs.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 821-829
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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