Wyniki wyszukiwania dla: VECTOR POINT SOURCE

• Scalar- and vector-source wave equations

  Publikacja

  • H. Lasota

  - Rok 2009

  W analizie zjawisk akustyki liniowej i obliczeniach pola, powszechnie stosowane są równania falowe skalarne dotyczące ciśnienia akustycznego lub potencjału prędkości, natomiast rzadko są choćby tylko wspominane równania wektorowe operujące prędkością cząstek. Jest to przejaw asymetrii w traktowaniu skalarnych i wektorowych wielkości akustycznych. Artykuł przypomina dwa zestawy dualnych równań falowych, jednorodnych i niejednorodnych,...

• Three-Level Z-Source Neutral-Point-Clamped Inverter

  Publikacja

  • R. Strzelecki

  - Rok 2006

  The paper describes construction and the principles of activity, attributes and potential of 3-phase Z-type inverters. The paper focuses on the basic system and suggested 3-level system of a NPC type Z-inverter, which was elaborated by authors. Simplified theoretical analysis of both systems has been verified by detailed simulation research. In the last section of the article, the possibility to build multilevel Z- inverters based...

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• Automatic sound source localization in disturbing conditions using acoustic vector sensors

  Publikacja

  • A. Czyżewski
  • J. Kotus

  - Elektronika Ir Elektrotechnika - Rok 2011

  A concept, practical realization and applications of a passive acoustic radar to automatic localization and tracking of sound sources in disturbing conditions were presented in the paper. The device consists of the new kind of multichannel miniature sound intensity sensors and a group of digital signal processing algorithms. The sensitivity of the realized acoustic radar was examined in free sound field. Several kinds of sound...

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• Hybridized Space-Vector Pulsewidth Modulation for Multiphase Two-Level Voltage Source Inverter

  Publikacja

  • A. Lewicki
  • C. I. Odeh
  • D. Kondratenko
  • M. Morawiec

  - IEEE TRANSACTIONS ON POWER ELECTRONICS - Rok 2022

  In space vector pulsewidth modulation (SVPWM) algorithms for multiphase two-level voltage source inverters (VSI), the components of active vectors in all orthogonal spaces have to be calculated within the processor and stored in its memory. These necessitate intensive computational efforts of the processor and large memory space. This article presents a hybridized SVPWM for multiphase two-level VSI. In this algorithm, elements...

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• Time-Domain Description of Point-Source Acoustic Wavefields as a Useful Approach in Ultrasonic Techniques

  Publikacja

  • H. Lasota

  - Rok 2011

  In traditional acoustics, field problems are usually treated in the frequency domain, broadband fields being reduced to superposition of harmonic spectrum components. However, this approach is inherently acausal and it is known that in case of arbitrary signals, the distribution-based, time-domain description can be more effective. The present paper is an attempt to expand the time-domain linear systems formalism onto space problems...

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• Time-domain description of point-source acoustic wavefields as a useful approach in ultrasonic techniques

  Publikacja

  • H. Lasota

  - Rok 2012

  In traditional acoustics, field problems are usually treated in the frequency domain, broadband fields being reduced to superposition of harmonic spectrum components. However, this approach is inherently acausal and it is known that in case of arbitrary signals, the distribution-based, time-domain description can be more effective. The present paper is an attempt to expand the time-domain linear systems formalism onto space problems...

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• space-vector pulse width modulation for three-level npc converter with the neutral point voltage control

  Publikacja

  • A. Lewicki
  • Z. Krzemiński
  • H. Abu-Rub

  - IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS - Rok 2011

  Przedstawiono strategię modulacji PWM dla trójpoziomowych falowników NPC z predykcją i kompensacją asymetrii rozkładu napięcia na kondensatorach obwodu pośredniczącego

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• Optimized Space Vector Modulation strategy for five phase voltage source inverter with third harmonic injection

  Publikacja

  • A. Lewicki
  • P. Strankowski
  • M. Morawiec
  • J. Guziński

  - Rok 2017

  This paper presents a simple and an effective SVM algorithm for five-phase Voltage-Source Inverters with the possibility to control independently the voltage vectors for fundamental and auxiliary orthogonal subspaces. The essential benefit is that output voltage is generated using only four active voltage vectors with limited numbers of switching. In the proposed solution, four active vectors are arbitrary chosen, independent of...

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• Feasibility study of inductor coupling in three-level neutral-point-clamped quasi-Z-source DC/AC converter

  Publikacja

  • J. Zakis
  • O. Husev
  • R. Strzelecki

  - Rok 2014

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• Localization of sound sources with dual acoustic vector sensor

  Publikacja

  • J. Kotus
  • G. Szwoch

  - Rok 2019

  The aim of the work is to estimate the position of sound sources. The proposed method uses a setup of two acoustic vector sensors (AVS). The intersection of azimuth rays from each AVS should indicate the position of a source. In practice, the result of position estimation using this method is an area rather than a point. This is a result of inaccuracy of the individual sensors, but more importantly, of the influence of a source...

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