- document
-
Hagmeijer, R. (author)Computational grids are used for the discretisation of partial differential equations (PDE's) such that solution of the resulting system of algebraic equations for the discrete values of the dependent variables provides an approximation to the solution of the system of PDE's. When the discretisation of the partial differential equations (PDE's)...report 1997
- document
-
Hilbrink, N.A. (author)The report in firont of you is the second report in a series of two, the first report entitied "Human Factors in Virtual Environments, part I: literature study" was written as a theoretical study in the field of virtual environments. This report describes the use of virtual environment technology for training of cosmonauts in the use of the...report 1997
- document
-
Dujardin, P.G.J.P. (author)Within a small satellite project, Sloshsat FLEVO, a dedicated Motion Sensing Subsystem (MSS) is developed for a micro-gravity space experiment. Sloshsat FLEVO is a small free flying spacecraft designed for the investigation of forces exerted upon a partially filled tank by a liquid sloshing. The MSS will monitor the motion of the spacecraft in...report 1997
- document
-
Schra, L. (author), Wanhill, R.J.H. (author)In 1991 a simple automated stress corrosion testing method called the ASCOR (Automated Stress corrosion Ring) test was developed to test aluminium alloys according to ASTM specification G49. The present investigation concentrated on evaluating two aspects of the test method: The SCC initiation criterion (2 % load decrease). The possibility of...report 1997
- document
-
Vogels, M.E.S. (author)For flow simulation around (parts of) aerospace vehicles, aerospace industry needs CFD software. For users in industry, not only the functionality of the software is relevant. Timely availability and cost of the first version and later versions are other relevant factors. These factors are represented in the software characteristics timeliness,...report 1997
- document
-
Vink, W.J. (author), de Jonge, J.B. (author)The present report is part of a "Manual" on aircraft loads, that is being prepared by NLR. It contains a computer program, to be used in combination with "MATLAB4 for Windows" (Student Edition) software, to study aircraft loading due to turbulence. It includes a simple aircraft response model with two rigid and three flexible symmetric degrees...report 1997
- document
-
Algra, T. (author), Looyen, W.J. (author), de Brouwer, M. (author), Venema, J.C. (author)This paper describes the conceptual design of a synthetic aperture radar (SAR) sensor operating at P-band frequency (435 MHz). It is part of the FAME (Forest Assessment and Monitoring Environment) initiative for the realisation of a global operational end-to-end service to allow forests to be monitored at national and sub-national level. The...report 1997
- document
-
Algra, T. (author)Data storage devices each providing 260 MB non-volatile "random access memory will be used in the Data Management Systems of the Russian and the European Modules of the Space Station. The National Aerospace Laboratory NLR, and Signaal Special Products have jointly developed these Mass Storage Devices (MSD) based on commercial Winchester disks....report 1997
- document
-
Schra, L. (author), van der Hoeven, W. (author)In the aerospace industry there are continuing demands for weight reductions. These demands translate into the need to develop new materials with greater strength and stiffness and/or improved damage tolerance properties. The NLR has followed these developments by conducting experimental programmes to evaluate engineering properties like static...report 1997
- document
-
Verwer, J. (author), Loeve, W. (author), Snijdoodt, E. (author), ten Dam, A. (author)In The Netherlands as a result of a national HPCN initiative a Foundation HPCN was established in 1995. The purpose of this Foundation is to stimulate structural and lasting cooperation of universities, technological institutes and industry in economically relevant applications of HPCN. Projects have been selected and since the beginning of 1996...report 1997
- document
-
Loeve, W. (author), van der Ven, H. (author), Vogels, M.E.S. (author), Baalbergen, E.H. (author)Enterprises are confronted with the challenge to lower cost of product engineering. Engineers enter and leave enterprises. Much engineering know-how can be conserved for use by successive generations of engineers in documented engineering procedures, in software for simulation and in the supporting documents and simulation related data. IT can...report 1997
- document
- Visser, F.B. (author), Wolff, M. (author) report 1997
- document
-
Bos, J.F.T. (author), Oort, M.J.A. (author)Currently Fokker Space B.V. is developing the European Robotic Arm (ERA) under contract of the European Space Agency (ESA). ERA's main mission is the assembly and servicing of the Russian Segment of the International Space Station Alpha. The purpose of this paper is to describe how the safety requirements, given the specific possibilities and...report 1997
- document
-
de Koning, A.U. (author)In this report a survey is given of recent research at NLR on damage tolerance analyses of aerospace structures and materials. The work was primarily done under contracts with the NRT (= Nationaal Ruimtevaart Technologie programma) and ESA (European Space Agency). The contributions of NRT are indicated.report 1997
- document
-
de Jonge, J.B. (author)A brief review is given of work performed in the Netherlands in the field of aeronautical fatigue. Where possible, applicable references have been presented. This review will be presented at the 25th ICAF Conference, Edinburgh, United Kingdom, 16-17 June 1997.report 1997
- document
- Hilbrink, N.A. (author) report 1997
- document
-
Thuis, H.G.S.J. (author), Biemans, C. (author)In this paper the results of a program, in which a composite bracket as replacement of a metal forging was developed, will be presented. The finite element method in combination with an optimization module was used to design the bracket. Compared to its metal counter part, the composite bracket demonstrated a weight reduction of 43%. Two...report 1997
- document
-
Persoon, A.J. (author), Balmes, E. (author)In april 1995 a Structures and Materials Action Group (SM AG-19) of GARTEUR (£roup for Aeronautical Research and lechnology in Europe) started an activity with the major objective to compare a number of current measurement and identification techniques applied to a common testbed. Twelve European groups participated, most of them involved in...report 1997
- document
-
Mastenbroek, O. (author)In the framework of the development of future missions, the European Space Agency is investigating the feasibility of space borne active optical instruments such as atmospheric lidars. The core sub-system of any lidar is the laser transmitter, it emits concentrated optical energy probing the atmosphere or the earth surface in the case of earth...report 1997
- document
-
Pronk, Z. (author)This technical report contains the results of a pilot study on the application of Computer Based Training (CBT) for ERA operations training and for payload operations training onboard International Space Station.report 1997