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Wyszukujesz frazę "micro-electromechanical systems" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Investigation of Electrical Properties for Cantilever-Based Piezoelectric Energy Harvester
Autorzy:
Ali, Ahsan
Pasha, Riffat Asim
Sheeraz, Muhammad Abdullah
Butt, Zubair
Elahi, Hassan
Khan, Afzaal Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/102729.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
piezoelectric
micro-electromechanical systems
energy harvesting
microsystems
bimorph
systemy mikroelektromechaniczne
zbieranie energii
mikrosystemy
bimorf
Opis:
In the present era, the renewable sources of energy, e.g., piezoelectric materials are in great demand. They play a vital role in the field of micro-electromechanical systems, e.g., sensors and actuators. The cantilever-based piezoelectric energy harvesters are very popular because of their high performance and utilization. In this research-work, an energy harvester model based on a cantilever beam with bimorph PZT-5A, having a substrate layer of structural steel, was presented. The proposed energy scavenging system, designed in COMSOL Multiphysics, was applied to analyze the electrical output as a function of excitation frequencies, load resistances and accelerations. Analytical modeling was employed to measure the output voltage and power under pre-defined conditions of acceleration and load resistance. Experimentation was also performed to determine the relationship between independent and output parameters. Energy harvester is capable of producing the maximum power of 1.16 mW at a resonant frequency of 71 Hz under 1g acceleration, having load resistance of 12 kΩ. It was observed that acceleration and output power are directly proportional to each other. Moreover, the investigation conveys that the experimental results are in good agreement with the numerical results. The maximum error obtained between the experimental and numerical investigation was found to equal 4.3%.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 3; 76-85
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
А Меаsuring Method for Gyro-Free Determination of the Parameters of Moving Objects
Autorzy:
Dichev, D.
Koev, H.
Bakalova, T.
Louda, P.
Powiązania:
https://bibliotekanauki.pl/articles/220671.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adaptive measuring systems
dynamic error
dynamic measurements
Kalman filter
micro-electromechanical systems
roll
pitch
heel
trim
Opis:
The paper presents a new method for building measuring instruments and systems for gyro-free determination of the parameters of moving objects. To illustrate the qualities of this method, a system for measuring the roll, pitch, heel and trim of a ship has been developed on its basis. The main concept of the method is based, on one hand, on a simplified design of the base coordinate system in the main measurement channel so as to reduce the instrumental errors, and, on the other hand, on an additional measurement channel operating in parallel with the main one and whose hardware and software platform makes possible performing algorithms intended to eliminate the dynamic error in real time. In this way, as well as by using suitable adaptive algorithms in the measurement procedures, low-cost measuring systems operating with high accuracy under conditions of inertial effects and whose parameters (intensity and frequency of the maximum in the spectrum) change within a wide range can be implemented.
Źródło:
Metrology and Measurement Systems; 2016, 23, 1; 107-118
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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