Searched for: subject%3A%22Computer%255C-aided%255C-design%22
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Arendsen, P. (author), van Dalen, F. (author), Bill, C. (author), Rothwell, A. (author)
In a joint research project between the National Aerospace Laboratory (NLR) and the Faculty of Aerospace Engineering of Delft University of Technology (TUD) a multi-level system for the preliminary design of aircraft structures has been developed. The present system is essentially an extension of the existing Aircraft Design and Analysis System ...
report 1995
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van der Burg, J.W. (author), Maseland, J.E.J. (author), Hagmeijer, R. (author), de Cock, K.M.J. (author)
In this paper the capabilities of an automated CFD system which is currently available at NLR are demonstrated. Transonic flow around the AS28G wing/body configuration and hypersonic flow through a generic three-dimensional mixed-compression airbreathing inlet are simulated. An assessment of the level of automation of the current CFD-system is...
report 1995
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Van Dijk, C.G.C. (author)
doctoral thesis 1994
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Dekker, G.J. (author), Hameetman, G.J. (author)
Bij het ontwikkelen van de standregelprogrammatuur voor de Italiaanse satelliet SAX is gebruik gemaakt van een aantal CASE tools. Naast een beschrijving van de standregelprogrammatuur, met als hoofdeisen een hoge mate van bedrijfszekerheid en een hoge flexibiliteit, worden de ontwikkelsituatie en de ontwikkelomgeving beschreven. Geschetst wordt...
report 1993
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Hombergen, V.J.W. (author)
Publication year estimated. Computer program to design breakwater cross-sections
report 1992
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de Jong, S. (author)
The predesign document of DEFMEF presents the decisive requirements for the DEFMEF language and the associated DEFMEF translator. It also shows a basic technical design, which fulfills the requirements. DEFMEF as a software design language has been designed so, that it is possible to describe both a technical design and a detailed design with it...
report 1991
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van den Dam, R.F. (author)
An interactive computer program system has been developed that can be used in aircraft drag minimization studies. It comprises algorithms for choosing the spanwise distributions of lift, pitching moment, chord and thicknessto-chord ratio of lifting elements. The choices are optimal in that they minimize induced plus viscous drag while satisfying...
report 1988
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Buijsen, F.A. (author), Kassies, A. (author), Boerstoel, J.W. (author)
The results of calculations of two- and three-dimensional flows on blocked grid domains consist of vast data collections with a simple, regular structure. The inspection of these results can only be done efficiently by graphical means, and by exploiting the regular structure of the data. There is a large similarity between the format of the...
report 1988
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Schuring, J. (author)
Current design methods for digital control systems to be operated in a continuous environment do not always result in the most efficient use of digital computing hardware. To improve this situation, a dedicated frequency response analysis method was developed for hybrid systems. For practical use of the method, it has been expanded to an...
report 1987
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Donker, J.C. (author), Kat, P.J. (author)
In the engineering process, many design decisions are made in the initial stage. These decisions can have far-reaching consequences. Especially in a multi-disciplinary design process, it is desirable to be able to gather the diverse alternatives for aspects of a design and to store them in some formal representation in order to reason about them...
report 1986
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van den Dam, R.F. (author)
The central issue discussed in this paper is how a designer may profit from the use of mathematical simulation and optimization techniques. These techniques can be useful tools to support the designer in solving his design problem. The place and the potential of these techniques in the design process, as well as their use by the designer, are...
report 1985
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Barends, F.B.J. (author), Van Dijk, J.J. (author)
The risk~analysis offers a method to determine the probability that an important function of a structure is no longer fulfilled (failure or malfunctioning). This probability should be selected having in mind the minimization of the generalized cost of the structure and the maximization of its utility (Minimax). Comparison of the contribution of...
report 1985
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Daniels, H.A.M. (author)
In this paper the CAD system DESTIP is described. DESTIP is developed at the NLR for designing compression panels in wing box structures. Application of the system yields optimal panels in the sense that they meet all the requirements imposed by the designer and have minimum weight per unit width. Weight reductions ranging from 0 to 10% have...
report 1985
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van den Dam, R.F. (author)
The use of numerical simulation and optimization techniques is rapidly expanding in all fields of engineering design. The place and the potential of these techniques in the design process, as well as their use by the designer, are discussed. The principles underlying these techniques are outlined and an overall view is given of the various...
report 1985
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Labruijere, T.E. (author)
A program system has been developed as a tool for interactive analysis and design of multi-element airfoils in incompressible viscous flow. A global description of the system is given. It involves the application of three computational methods, one for the analysis of viscous flow and one for the analysis of inviscid flow around multi-element...
report 1983
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van Egmond, J.A. (author), van den Berg, B. (author), Labrujere, T.E. (author)
At NLR a system for the computational design on multi-element airfoil has been developed. This design system solves the inverse aerodynamic problem in an approximate way. A priori specified aerodynamic requirements (surface pressure distribution) and geometric requirements are minimized in a least-squares way, introducing weight factors to...
report 1983
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Loeve, W. (author), van den Dam, R.F. (author)
NLR has developed an infrastructure of hardware and software for support of aerodynamic design of aircraft. Organizational and technical aspects of this development are described.
report 1983
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Loeve, W. (author), van den Dam, R.F. (author)
The NLR in the Netherlands renders scientific support and technical assistance for the design and operation of aircraft and spacecraft. The approach of NLR can be characterized by integration of experimental and theoretical investigations. For this an integrated computer and terminal network has been developed that links both NLR laboratory...
report 1983
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