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Systèmes, Théorie des --- Analyse de fourier --- Fast fourier transform = fft

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The flutter, is one of the most complex and dangerous aeroelastic phenomena. Nowadays, the certification authorities have to guarantee the non-appearance of this phenomenon, in such a way that the safety of the aircrafts is not compromised. The preliminary design of any aircraft includes an estimate of the flutter speed.
This thesis focuses on studying the estimation of the flutter speed through several methods, including numerical and experimental approaches. The main target is the discussion of the results and the possibility to develop an accurate method to properly predict the flutter speed and its characteristics in the near future. Three different methods are used in this thesis; empirical formula, numerical and experimental methods, where the differences between the experimentation and theory will be commented. 
The combination of different numerical methods as Finite Elements Method and Vortex Lattice Method is used simultaneity alongside wind tunnel tests. Moreover, an empirical formula based on the geometrical parameters is analysed and commented in an attempt to discover and prove new ways to develop this concept of flutter acquisition. Finally, some range conditions for the validity of this empirical formula are defined in base of a comparison to the other methods.

flutter --- aeroelasticity --- wind tunnel --- wing --- FEM --- VLM --- experimental aerodynamics --- damping --- frequency --- Fast Fourier Transform --- Ingénierie, informatique & technologie > Ingénierie aérospatiale

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Vibrations --- geluidsanalyse --- vibreren --- akoestiek --- trillingsanalyse --- fysica --- Frequency analysis --- Power spectra --- Spectrométrie --- Spectrometry --- 517.518.4 --- #TWER:MOD --- FFT --- Fouriertransformatie --- frequenties --- filters --- Akoestiek --- Bandbreedte --- DFT --- Filters --- Fourier --- Frequentie --- RMS --- frequentie-analyse --- frequentie --- fft --- Trigonometric series --- 517.518.4 Trigonometric series --- Analyse de frequences --- Fast fourier transform --- Fft --- Cepstrum --- Spectrum --- Signaux non stationnaires --- Signaux stationnaires

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Functional analysis --- Transformations de Fourier --- Filtres numériques (Mathématiques) --- 517.44 --- 519.6 --- 519.6 Computational mathematics. Numerical analysis. Computer programming --- Computational mathematics. Numerical analysis. Computer programming --- 517.44 Integral transforms. Operational calculus. Laplace transforms. Fourier integral. Fourier transforms. Convolutions --- Integral transforms. Operational calculus. Laplace transforms. Fourier integral. Fourier transforms. Convolutions --- Fourier transformations --- Convolutions (Mathematics) --- Digital filters (Mathematics) --- Data processing --- Informatique --- Analyse de fourier --- Fast fourier transform = fft

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The 5th IEEE International Conference on Applied System Innovation 2019 (IEEE ICASI 2019, https://2019.icasi-conf.net/), which was held in Fukuoka, Japan, on 11–15 April, 2019, provided a unified communication platform for a wide range of topics. This Special Issue entitled “Selected Papers from IEEE ICASI 2019” collected nine excellent papers presented on the applied sciences topic during the conference. Mechanical engineering and design innovations are academic and practical engineering fields that involve systematic technological materialization through scientific principles and engineering designs. Technological innovation by mechanical engineering includes information technology (IT)-based intelligent mechanical systems, mechanics and design innovations, and applied materials in nanoscience and nanotechnology. These new technologies that implant intelligence in machine systems represent an interdisciplinary area that combines conventional mechanical technology and new IT. The main goal of this Special Issue is to provide new scientific knowledge relevant to IT-based intelligent mechanical systems, mechanics and design innovations, and applied materials in nanoscience and nanotechnology.

HVAC energy conservation --- optimal control --- genetic algorithm --- FCU group control --- central pattern generator --- Theo Jansen Linkage --- non-collocated actuators --- fast Fourier transform --- FFT --- kernel --- MIMO --- OFDM --- multistandard --- electrical resistivity tomography --- boundary effect --- 3D effect --- error compensation --- free-form surface --- on-machine measurement --- mirror compensation method --- stereo matching --- cost aggregation --- image filtering --- binocular stereo vision --- deep learning for network security --- long short-term memory --- malicious traffic classification --- assembly design --- usability and operation complexity --- fuzzy theory --- product design --- layout strategy --- design method --- n/a