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Schuring, J. (author)
In order to obtain insight in the accuracy of automatic approaches, the symmetric motions of an aircraft, stabilized by autopilot and autothrottle, are simulated on an electronic analog computer. The aircraft tracks an I.L.S. glide path, being disturbed by I.L.S. beam bends, atmospheric turbulence and wind shear. The deviations of the aircraft...
report 1973
document
Dekker, G.J. (author)
Modern commercial transport aircraft contain digital avionics systems for more and more safety critical functions. The reliability and safety of those new systems depend on the hardware reliability and on the reliability of the embedded software. In this report, an overview is given of available methods and techniques to develop reliable...
report 1982
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van Woerkom, P.T.L.M. (author)
Mathematical models of the dynamics of spacecraft are needed to carry out numerical simulations, to gain insight into the characteristics of the spacecraft dynamics, and to synthesize control algorithms suitable for online system Identification, estimation, and control. Increases in size and mechanical complexity of spacecraft result in...
report 1985
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Verhoef, W. (author)
A simple analytical four-stream radiative transfer model based on Suits's differential equations is applied to the atmosphere-earth system in order to investigate the effects of the atmosphere and the view angle on remotely sensed multispectral radiance data from vegetation canopies. This scene radiation model is composed of two atmospheric...
report 1985
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van Woerkom, P.T.L.M. (author), Guelman, M. (author)
Four well-known formalisms for mathematical modelling of the dynamics of a spacecraft/manipulator system are derived from the unifying d'Alembert principle. The Newton-Euler formalism is discussed in more detail, as it allows efficient numerical simulation. An algorithm is defined for the control of the manipulator end-effector motion in...
report 1987
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Pronk, C.N.A. (author), Ersü, E. (author), Lippay, A.L. (author), Elfving, A. (author)
Recently, the European Space Agency (ESA) initiated two studies to define a simulation facility for space operations involving space manipulators and other in-orbit servicing and assembly systems. This European Robotic Operations Simulator (EUROSIM) will play an important role during system development as well as prior and parallel to...
report 1987
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Prins, J.J.M. (author), Dieleman, P. (author), Hoogstraten, J.A. (author)
The Hermes Manipulation System (HERA) will be an important part of the Hermes space plane system. The HERA is a sophisticated space manipulator system, which has to perform tasks ranging from capture and berthing to tool operation in various operational modes from fully automatic to purely manual. The HERA system main contractor is Fokker Space ...
report 1987
document
Verhoef, W. (author)
In the past, a relatively simple radiative transfer model, based on scattering and extinction of two semi-isotropic diffuse fluxes and two direct fluxes (solar beam and radiance in the viewing direction), has been applied to vegetation canopies and to the atmosphere. This model takes little computing power, but its numerical accuracy had not yet...
report 1988
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Postma, L. (author), Gils, J.A.G. van (author), Hendriks, A. (author), Stralen, F.C. van (author)
report 1989
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van Woerkom, P.T.L.M. (author)
For the simulation of rigid spacecraft manipulator dynamics there exists efficient recursive software. Extension of this software for the simulation of flexible spacecraft-manipulator dynamics would have important advantages. In this paper the method of Equivalent Flexibility Modelling (EFM) is outlined. Each flexible body is re-modelled as a...
report 1989
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Gerritsen, H. (author), Ronde, J.G. de (author)
report 1989
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Abkowitz, M.A. (author)
conference paper 1990
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Vries, I. de (author), Vries, M.B. de (author), Goossens, J.G.C.M. (author)
report 1990
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Liu, P. (author)
This paper presents the more salient results of an experimental and numerical study on jack-up dynamic behavior. The laboratory studies of three principle jack-up platform models were carried out in both regular and irregular waves. The data from irregular wave tests were analyzed in both the probability domain and frequency domain supported by...
journal article 1991
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Ribberink, J.S. (author), Al-Salem, A.A. (author)
report 1991
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Ribberink, J.S. (author), Al-Salem, A.A. (author)
report 1992
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Steijn, R.C. (author), Hartsuiker, G. (author)
report 1992
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Couwenberg, M.J.H. (author), ten Dam, A.A. (author), Mans, M.T.G.A.R. (author)
Simulation plays an increasingly important role during several stages and several types of space related projects, ranging from engineering support simulators to training simulators. Therefore it is required to have a common basis for the definition, the development and, finally, the use of simulators. In this paper the approach for the...
report 1992
document
Baan, P.J.A. (author)
report 1993
document
Bujakiewicz, P. (author)
doctoral thesis 1994
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