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Wyszukujesz frazę "sound control system" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
A mechatronic project device to play CDs
Autorzy:
Ciesielka, W.
Chmielowski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/114593.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
mechatronic project
sound control system
device to play CDs
Opis:
In this paper an autonomous device for playing CDs is presented. The work was divided into two fundamental stages. In the first – the preliminary one – a broad analysis of the structure and the operating principles of these players was carried out. In the second stage, the mechanical, electronic and software parts of the CD player were designed and made. Catia V5R15 software was used for the realization of the mechanical part. Printed circuits were designed and made with the help of Protel program. The essential analyses and simulations were performed in Protel, too. The software part included development of the algorithms and realization of the device control program and was made using AVR GCC compiler. In the final stage, verification of the device correctness was made by taking electrical measurements and performing audio monitoring tests.
Źródło:
Measurement Automation Monitoring; 2015, 61, 4; 118-121
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active Transient Sound Radiation Control from a Smart Piezocomposite Hollow Cylinder
Autorzy:
Hasheminejad, S. M.
Rabbani, V.
Powiązania:
https://bibliotekanauki.pl/articles/177572.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active structural acoustic control (ASAC) thick cylindrical shells
exact elasto-acoustic analysis
time-domain solution
intelligent system
sound field attenuation
Opis:
The linear 3D piezoelasticity theory along with active damping control (ADC) strategy are applied for non-stationary vibroacoustic response suppression of a doubly fluid-loaded functionally graded piezolaminated (FGPM) composite hollow cylinder of infinite length under general time-varying excitations. The control gain parameters are identified and tuned using Genetic Algorithm (GA) with a multi-objective performance index that constrains the key elasto-acoustic system parameters and control voltage. The uncontrolled and controlled time response histories due to a pair of equal and opposite impulsive external point loads are calculated by means of Durbin’s numerical inverse Laplace transform algorithm. Numerical simulations demonstrate the superior (good) performance of the GA-optimized distributed active damping control system in effective attenuation of sound pressure transients radiated into the internal (external) acoustic space for two basic control configurations. Also, some interesting features of the transient fluid-structure interaction control problem are illustrated via proper 2D time domain images and animations of the 3D sound field. Limiting cases are considered and accuracy of the formulation is established with the aid of a commercial finite element package as well as comparisons with the current literature.
Źródło:
Archives of Acoustics; 2015, 40, 3; 359-381
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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