Searched for: mods_originInfo_publisher_s%3A%22EDP%255C+sciences%22
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Lombaerts, T. (author)
This publication describes a recursive algorithm for the approximation of time-varying nonlinear aerodynamic models by means of a joint adaptive selection of the model structure and parameter estimation. This procedure is called adaptive recursive orthogonal least squares (AROLS) and is an extension and modification of the previously developed...
journal article 2013
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Reijneveld, J. (author), Choukroun, D. (author)
This work is concerned with the development of the attitude control algorithms that will be implemented on board of the Delfi-n3xt nanosatellite, which is to be launched in 2013. One of the mission objectives is to demonstrate Sun pointing and three axis stabilization. The attitude control modes and the associated algorithms are described. The...
journal article 2013
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Smaili, H. (author), Breeman, J. (author), Lombaerts, T. (author), Stroosma, O. (author)
A large transport aircraft simulation benchmark (REconfigurable COntrol for Vehicle Emergency Return ? RECOVER) has been developed within the GARTEUR (Group for Aeronautical Research and Technology in Europe) Flight Mechanics Action Group 16 (FM-AG(16)) on Fault Tolerant Control (2004 2008) for the integrated evaluation of fault detection and...
journal article 2013
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Choukroun, D. (author), Maas, A. (author), Kuiper, J.M. (author)
This paper presents current developments of the attitude determination algorithm for Del¦-n3Xt, TU Delft next nanosatellite. Several novel quaternion filters using Sun vector and Earth magnetic field measurements and rate gyro outputs are presented. The quaternion measurement matrix associated with each line-of-sight measurement is shown to be...
journal article 2013
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Winterbach, W. (author), De Ridder, D. (author), Wang, H.J. (author), Reinders, M. (author), Van Mieghem, P. (author)
conference paper 2012
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Morten, J.P. (author), Brataas, A. (author), Bauer, G.E.W. (author), Belzig, W. (author), Tserkovnyak, Y. (author)
The injection of pure spin current into superconductors by the dynamics of ferromagnetic contact is studied theoretically. Taking into account the suppression of the order parameter at the interfaces (inverse proximity effect) and the energy-dependence of spin-flip scattering, we determine the temperature-dependent ferromagnetic resonance...
journal article 2010
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Driessen, E.F.C. (author), Braakman, F.R. (author), Reiger, E.M. (author), Dorenbos, S.N. (author), Zwiller, V. (author), De Dood, M.J.A. (author)
We measured the single-photon detection efficiency of NbN superconducting single-photon detectors as a function of the polarization state of the incident light for different wavelengths in the range from 488 nm to 1550 nm. The polarization contrast varies from ?5% at 488 nm to ?30% at 1550 nm, in good agreement with numerical calculations. We...
journal article 2009
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Fraanje, R. (author), Doelman, N. (author), Verhaegen, M. (author)
Using a matching pursuit (MP) approach to solve least squares problems with a sparsity constraint sparse controllers are computed to compensate for atmospheric turbulence. The method has been validated by simulation of von K´arm´an turbulence with frozen flow for the case of prediction, reconstruction and control.
conference paper 2009
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Hattink, J. (author), Celis, N. (author), De Boeck, G. (author), Krijger, G.C. (author), Blust, R. (author)
Radio-caesium is an important radionuclide released considering food and feed products. In aquatic environments caesium tends to accumulate in fish, both through its diet and its gills. This presentation discusses the caesium accumulation in fish living in estuaries. The aim of this work is to conclude on the importance of potential uptake...
journal article 2009
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EL Ghami, M. (author), Bai, Y.Q. (author), Roos, C. (author)
Recently, Y.Q. Bai, M. El Ghami and C. Roos [3] introduced a new class of so-called eligible kernel functions which are defined by some simple conditions. The authors designed primal-dual interiorpoint methods for linear optimization (LO) based on eligible kernel functions and simplified the analysis of these methods considerably. In this paper...
journal article 2009
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Zhu, J. (author), Zhang, W. (author), Bassir, D.H. (author)
The aim of this paper is to enhance the validity of existing evolutionary topology optimization procedures. As this hard-killing scheme related to the element sensitivity values may lead to incorrect predictions of inefficient elements to be removed and the value of the objective function becomes sharply deteriorated during the iterations, a...
journal article 2009
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Hrauda, N. (author), Zhang, J.J. (author), Stoffel, M. (author), Stangl, J. (author), Bauer, G. (author), Rehman-Khan, A. (author), Holy, V. (author), Schmidt, O.G. (author), Jovanovic, V. (author), Nanver, L.K. (author)
We report on studies of strain and composition of two-dimensionally ordered SiGe islands grown by molecular beam epitaxy using high resolution x-ray diffraction. To ensure a small size distribution of the islands, pit-patterned 4 (001) Si wafers were used as substrates. The Si wafers were patterned by optical lithography and reactive ion etching...
journal article 2009
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Abdelal, G.F. (author), Bakr Elhady, A. (author), Kassab, M. (author)
Solar array rotation mechanism provides a hinged joint between the solar panel and satellite body, smooth rotation of the solar array into deployed position and its fixation in this position. After unlocking of solar panel (while in orbit), rotation bracket turns towards ready-to-work position under the action of driving spring. During...
journal article 2009
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Hovenier, J.W. (author), Stam, D.M. (author)
The atmospheres of (exo) planets and moons, as well as reflection nebulae, contain in general independently scattering particles in random orientation and are often supposed to be plane-parallel. Relations are presented for the (bidirectional) reflection function and several related functions of such a medium in case the directions of incidence...
journal article 2008
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Boone, M.M. (author)
journal article 2008
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EL Ghami, M. (author), Roos, C. (author)
In this paper we present a generic primal-dual interior point methods (IPMs) for linear optimization in which the search direction depends on a univariate kernel function which is also used as proximity measure in the analysis of the algorithm. The proposed kernel function does not satisfy all the conditions proposed in
journal article 2008
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Stam, D.M. (author)
We present results of numerical simulations of flux F and degree of polarization P of light that is reflected by Earth–like extrasolar planets orbiting solar type stars. Our results are presented as functions of the wavelength (from 0.3 to 1.0 ?m, with 0.001 ?m spectral resolution) and as functions of the planetary phase angle. We use different...
journal article 2007
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Menouillard, T. (author), Réthoré, J. (author), Bung, H. (author), Suffis, A. (author)
Composites materials are now being used in primary aircraft structures, and other domains because of numerous advantages. A part of a continuous in-flight operating costs, gas turbine engine manufacturers are always looking for ways to decrease engine weight. This is the case of compressor blades which have to satisfy, for example, the standard...
journal article 2006
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Slot, E. (author), Holst, M.A. (author), Van der Zant, H.S.J. (author)
We have investigated transport characteristics of charge-density wave nanowires with a few hundred parallel chains. At temperatures below50K, these samples show power-law behavior in temperature and voltage, characteristic for one-dimensional transport. In this regime, gate dependent transport has been observed.
journal article 2005
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O´Neill, K. (author), Slot, E. (author), Thorne, R. (author), Van der Zant, H. (author)
We have investigated the electrical transport properties of insulating and metallic constrictions of dimensions 100nm-10_m in the charge-density wave (CDW) conductor NbSe3. The constrictions are made in a variety of ways: focused ion beam, reactive ion etching through a resist mask, and in a mechanicallycontrolled break junction configuration....
journal article 2005
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