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Bischoff van Heemskerck, W.C. (author), Booy, N. (author)The designing engineer often comes across the economic decision problem in which the "benefit" of a higher design criterion must be weighed against the "cost". Several methods have been developed to deal with this optimization problem; none of them, however, offer the possibility of introducing the appropriate considerations of a general policy...conference paper 1969
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Bischoff van Heemskerck, W.C. (author), Booy, N. (author)The designing engineer often comes across the economic decision problem in which the "benefit" of a higher design criterion must be weighed against the "cost". Several methods have been developed to deal with this optimization problem; none of them, however, offer the possibility of introducing the appropriate considerations of a general policy...conference paper 1969
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- Rose, C. (author) journal article
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Buob, M.O. (author), Uhlig, S. (author), Meulle, M. (author)BGP is used today by all Autonomous Systems (AS) in the Internet. Inside each AS, iBGP sessions distribute the external routes among the routers. In large ASs, relying on a fullmesh of iBGP sessions between routers is not scalable, so route-reflection is commonly used. The scalability of route-reflection compared to an iBGP full-mesh comes at...conference paper
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Wewerinke, P.H. (author)A theoretical and experimental program was conducted to study human response characteristics in a variety of single- and dual-axis control situations. The object was to build and support a human control effort model. The aspect of human controller's effort is indispensable for a complete description and prediction of human operator behavior and...report 1974
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Loeve, W. (author)For the aerospace laboratory NLR in the Netherlands the considerations are discussed that formed the basis of along-term plan to realize an optimal computer network. In the optimization process up to now the laboratory switched from a situation in which in each of both settlements one central close shop computer centre was available to a...report 1975
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Labrujere, T.E. (author)The present report describes a method for the design of airfoils in incompressible flow which, subject to geometrical constraints generate approximately a given distribution of the pressure coefficient along the projection of the airfoil chord on an axis parallel to the onset flow. The flow is simulated by means of a distribution of...report 1976
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van Woerkom, P.T.L.M. (author)The document contains a general theory towards the observation and optimal control of disturbed, target following aerospace systems. Disturbed, target following aerospace systems eire defined as aerospace systems that are designed to track a moving target system, while they are subjected to external, time-varying disturbances. The first five...report 1976
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Wewerinke, P.H. (author)This paper deals with a theoretical framework describing human operator's participation in manned vehicle systems. Herewith, the human operator is described in terms commensurate with those used for other system elements, which is desirable because of the complex interaction between human functioning and his task environment (e.g. cockpit i...report 1976
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Wewerinke, P.H. (author)This report deals with a theoretical and experimental program concerning human monitoring and and control behaviour. A model for multivariable monitoring (an automatic approach) was tested against experimental data. Apart from monitoring, simultaneously monitoring and manual flight director control was studied to determine the interference...report 1976
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Boerstoel, J.W. (author)In this study, an algorithm for the computational design of supercritical shock-free aerofoils is developed and analyzed with hodograph theory. Such an algorithm may be based on the combination of two approaches for the construction of solutions of the flow equations for shock-free transonic flow. In the first approach, such solutions are...report 1977
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Wewerinke, P.H. (author)The study described in this report was aimed at assessing the potentials of the optimal control model structure to predict the important characteristics of realistic operational helicopter missions. The theoretical and experimental results indicate that the optimal control model succesfully predicts the best attainable (rather than the average)...report 1977
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- Verhaeghe, R.J. (author) report 1978
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van Woerkom, P.T.L.M. (author)The attitude motion of interplanetary, spinning spacecraft under the influence of solar radiation and optimal thrusting, is investigated. A general model is formulated to describe the forces and torques exerted on the spacecraft due to solar radiation. The model is compared with model! available in the large body of literature on the subject. It...report 1978
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van Egmond, J.A. (author), Rozendal, D. (author)The design and experimental verification of a thick (18 %), shock free airfoil is described. The design was performed, using the NLR hodograph theory for transonic airfoil design. The airfoil was experimentally investigated in the NLR Pilot tunnel.report 1978
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Wewerinke, P.H. (author)The outside scene is often an important soiirce of information for manual control tasks. In the context of aircraft control the most important example is the visual approach scene. This study deals with modelling the visual scene perception process on the basis of linear perspective geometry and the relative motion cues and investigates its...report 1978
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Erkelens, L.J.J. (author), Simons, J.L. (author)This report deals with determining a hypothetic control system which provides improved rigid body and structural mode damping of a flexible aircraft in order to improve the riding qualities and to minimize the wing bending moment during flights in turbulence. The equations of motion used in the computations are related to a high' performance...report 1980
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Vaatstra, W. (author), Veldman, A.E.P. (author), van der Vooren, J. (author)The method of Glowinski, Periaux and Pironneau for the calculation of transonic flow, which is based on the constrained minimization of a cost function, is critically evaluated for a case in which the transonic small perturbation equation is used. The resulting minimization problem is discretized in finite element form and solved using a...report 1980
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- Samson, J. (author), Dijkman, J.P.M. (author) report 1981
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Prins, J.J.M. (author)The increasing power of on-board processors allows more freedom in the design and operation of reaction wheel control systems. This report discusses several performance and implementation aspects of the operation of wheel systems which have their own internal feedback control system. A model following control concept is found to be superior. The...report 1982