EuroSim status and applications, a review

The purpose of this document is to identify applications for the European Real-time Operations Simulator, EuroSim. First, the document provides an overview of the functional capabilities of the EuroSim. An executive summary of the EuroSim tool is given dealing with what it is, its current status, and what it will become. A list of possible...

CAELIS-B Optically induced fluorescence detector for capillary electrophoresis: Part I, Subsystem configuartion assesment

This document contains the description of the assessment of configuration concepts for an optically induced fluorescence detector, to be used on a miniaturized Capillary Electrophoresis (CE) instrument. The assessment is concluded with the selection of a concept for further instrument design and breadboarding. The selected concept consists of...

Guidelines for the Man-Machine Interface design of the crew workstation in Columbus

In the future Columbus in-space facility, the communication between the crew and the various system elements will mainly take place via the so called Crew Workstation (CWS). The CWS hardware will comprise a versatile set of I/O devices which enable the clear and unequivocal presentation of information to, and the easy issue of commands by crew...

Design of an integrated control system for flutter margin augmentation and gust load alleviation, tested on a dynamic windtunnel model

Since 1981 the National Aerospace Laboratory NLR has been involved in a research program to study the aeroelastic effects of active control systems. This research program was concentrated on the performance of a number of windtunnel tests with a dynamic windtunnel model, exhibiting "hard" flutter characteristics, lightly damped rigid body modes...

Final report study of synthetic aperture radar data compression and encoding: part III: performance evaluation of speckle suppression and data compression algorithms

Rate distortion bounds are derived for SAR images and compared with the rate versus distortion relations obtained with the speckle suppression and data compression algorithm described in Part II. A method is given for optimally processing multispectral SAR-images. The method makes use of the spectral correlation between the mean return power...

Trends in airlines flight deck design

This report gives an overview of the development of the airliner structure, engines and systems, and the impact on the cockpit design. The influence of the developments of micro-electronics, digital computer technology and display technology on the avionics design and cockpit lay-out of the recently introduced airliners as the Airbus A-310 is...

Modifications of flight-by-flight load sequences to provide for good fracture surface readability

In order to establish an inspection schedule for fatigue critical fastener holes in the wing lower skin of a fighter aircraft crack growth data under realistic loading was required. Experimental determination of these data was a logical choice since a representative specimen was available. However, the spectrum and load sequence, representative...

Visual scene perception process involved in the manual approach

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...

Computer aided EMC analysis: A review of available tools

A review is given of methods for the analysis of intrasystem electromagnetic compatibility. Emphasis is placed on pocket calculator programs and on the SEMCAP computer program. Taking into account the applications at NLR, we conclude that both tools can be very useful for such an analysis. As far as antenna-to-antenna coupling is considered, the...

Representatie door een putlijn van het niet-bepaneelde straaldeel bij straalinterferentie problemen

In een poging het onregelmatige karakter van de berekende bronsterkte ter plaatse van het einde van een door panelen gerepresenteerd straaldeel op te heffen werd het meer stroomafwaarts gelegen deel van de straal door een putlijn weergegeven. Uit numeriek onderzoek blijkt, dat dit geen remedie is voor het probleem. Een voorgestelde oplossing is...

Human control and monitoring-models and experiments

This paper deals with the resiilts of a theoretical and experimental program concerning human monitoring behavior. Apart from monitoring an automatic approach combined monitoring and manual flight director control was studied to determine the interference between subtasks. Also simultaneously monitoring and auditory tracking was included. The...

Supplementary residual strength investigation of the aluminium alloy 7475-T76

Some residual strength tests have been performed on 610 mm wide centre-cracked panels at a temperature of -50 C, in order to examine whether equal Ke values are obtained as for 300 mm wide panels, tested at -50°C. This work is a continuation of the residual strength investigation reported in NLR TR 76103 and NLR TR 75168.

On inviscied isentropic flow models used for finite difference calculations of two-dimensional transonic flows with embedded shocks about airfoils

Properties of inviscid isentropic flow models underlying finite difference methods for the calculation of two-dimensional transonic flows with embedded shocks about airfoils are discussed and compared. Attention is drawn to the fact that the isentropic time-dependent model described by Magnus and Yoshihara and the isentropic model used in...

The effect of "ground-to-air cycles" on the fatigue crack propagation in 2024-T3 Alclad sheet material

Constant-amplitude tests and simplified flight-simulation tests with 10 or 50 gust cycles per flight were performed. The effect of the ground-to-air cycle is compared with the Palmgren-Miner prediction. Optical and electron microscope observations of the fracture are presented.

Metingen in stationaire en niet stationaire asymmetrische vluchten ter bepaling van de stabiliteits- en besturingseigenschappen van het vliegtuig Beechcraft Queen Air, PH-NLR

In dit rapport wordt een onderzoek beschreven dat werd uitgevoerd om de stabiliteits- en besturingsafgeleiden van het stelsel bewegingsvergelijkingen voor de dwarsbeweging van het Queen Air laboratoriumvliegtuig van het NLR te bepalen. Twee vliegtuig- en vliegtoestanden zijn onderzocht. Een vooronderzoek was erop gericht met een analoge...

Een methode ter bepaling van contourafwijkingen van een supersone windtunnel met instelbaar keelstuk

Verslag van periode van praktisch werk van 21 juni t/m 23 augustus I965 bij het Nationaal Lucht- en Ruimtevaartlaboratorium te Amsterdam.