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de Kraker, K.J. (author), van de Wiel, R.A.N. (author)The use of UAVs for military and law enforcement purposes is increasing dramatically. Simultaneously, possible opponents are also developing UAV capabilities that they may deploy for their purposes. For example, a terrorist may deploy a commercially available model airplane or multicopter with an Improvised Explosive Device (IED). Or in the near...conference paper 2013
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- Smets, N.J.J.M. (author), Neerincx, M.A. (author) report 2013
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Shtessel, Y. (author), Glumineau, A. (author), Plestan, F. (author), Weiss, M. (author)A perturbed nonlinear system of relative degree two controlled by discontinuous-impulsive feedbacks is studied. The hybrid-impulsive terms serve to drive instantaneously the system trajectories to the origin or to its small vicinity. In particular, impulsive-twisting control exhibits an uniform exact finite time convergence to the second order...conference paper 2013
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Hasberg, M.P. (author), Leisman, L. (author), van de Voorde, I. (author), Weissbrodt, J. (author)The EU funded project COPRA (Comprehensive European Approach to the Protection of Civil Aviation) developed a roadmap for future research activities, which could lead to a more resilient, flexible and comprehensive approach. Tackling 70 existing and potential threats to aviation (security) identified during the COPRA project, the research...conference paper 2013
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Weiss, M. (author)The Linear Quadratic Consensus Control (LQCC) problem is a relaxation of the classical Linear Quadratic Regulation (LQR) problem, that consists of asymptotically driving the state of the system to a "consensus" point in which all coordinates are equal, in such a way that a quadratic cost function on the transient of the state trajectory and the...conference paper 2012
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Fucke, L. (author), Groen, E. (author), Goman, M. (author), Abramov, N. (author), Wentink, M. (author), Nooij, S. (author), Zaichik, L.E. (author), Khrabrov, A. (author)The objective of the European research project SUPRA (Simulation of Upset Recovery in Aviation) is to develop technologies that eventually contribute to a reduction of risk of Loss of control - in flight (LOC-I) accidents, today's major cause of fatal accidents in commercial aviation. To this end the project developed novel concepts to improve...conference paper 2012
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Weiss, M. (author), Buco, D. (author)The performance of guided weapon systems is primarily expressed by the end-of-flight effect, routinely approximated by the miss distance. It is however equally important that certain system variables of interest are kept within given bounds all along the duration of the flight. In this paper, we propose a method to evaluate such bounds in...conference paper 2012
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Teule, F. (author), Watts, T. (author), de Vries, J. (author), Oort, M. (author), Court, A.J. (author), Bol, H. (author)The Sentinel 5 precursor (S5p) mission as a small mission features TROPOMI (Tropospheric Monitoring Instrument) as the single payload on the selected platform. S5p will measure the composition of the Earth's atmosphere and is part of GMES, a joint initiative of the European Community and of the European Space Agency. TROPOMI builds on the...conference paper 2012
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van Dijk, N.J.M. (author), van de Wouw, N. (author), Doppenberg, E.J.J. (author), Oosterling, H.A.J. (author), Nijmeijer, H. (author)Chatter is an instability phenomenon in machining processes which limits productivity and results in inferior workpiece quality, noise and rapid tool wear. The increasing demand for productivity in the manufacturing community motivates the development of an active control strategy to shape the chatter stability boundary of manufacturing...article 2012
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Ledegang, W.D. (author), Groen, E.L. (author), Wentink, M. (author)This paper describes two simulator experiments studying how accurately pilots can judge and reproduce specific g loads and how their control behavior depends on the sensation of physical g loads during unusual attitude recovery. Seventeen commercial pilots participated. The first experiment shows that pilots tend to overestimate g loads,...article 2012
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Bucco, D. (author), Zarchan, P. (author), Weiss, M. (author)The adjoint simulation method is a well established and efficient tool for the preliminary analysis and design of conceptual guidance systems. Generally, the method is applicable when the guidance system is driven by either deterministic and/or stochastic signals. However, the focus of this paper will be on deterministic input signals. We start...conference paper 2012
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Cervone, A. (author), Zandbergen, B. (author), Guo, J. (author), Gill, E. (author), Wieling, W.P.W. (author), Nardini, F.T. (author), Schuurbiers, C.A.H. (author)The performance of several micro-propulsion systems is compared when applied to the specific needs of the DelFFi project, a formation flying technology demonstration expected to take place in the framework of the QB50 mission. The evaluated options include the T3μPS cold gas micro-propulsion system developed by TNO, Delft University of...conference paper 2012
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- de Bruijn, D. (author) article 2012
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Ledegang, W.D. (author), Groen, E.L. (author), Wentink, M. (author)This paper investigates how pilots' control behavior and motion perception during a simulated roll maneuver depends on the level of normal g load using a centrifuge-based simulator. Fourteen commercial pilots participated in the study, actively controlling a series of coordinated bank angle changes between -30 and +30 degrees. By changing the...conference paper 2012
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Veefkind, J.P. (author), Aben, I. (author), McMullan, K. (author), Förster, H. (author), de Vries, J. (author), Otter, G. (author), Claas, J. (author), Eskes, H.J. (author), de Haan, J.F. (author), Kleipool, Q. (author), van Weele, M. (author), Hasekamp, O. (author), Hoogeveen, R. (author), Landgraf, J. (author), Snel, R. (author), Tol, P. (author), Ingmann, P. (author), Voors, R. (author), Kruizinga, B. (author), Vink, R. (author), Visser, H. (author), Levelt, P.F. (author)The ESA (European Space Agency) Sentinel-5 Precursor (S-5 P) is a low Earth orbit polar satellite to provide information and services on air quality, climate and the ozone layer in the timeframe 2015-2022. The S-5 P mission is part of the Global Monitoring of the Environment and Security (GMES) Space Component Programme. The payload of the...article 2012
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Correia Grácio, B.J. (author), Bos, J.E. (author)Humans are able to estimate the vertical direction of an Earth fixed reference frame, which estimate is known as the subjective vertical (SV). To identify the SV, a distinction must be made between accelerations due to self-motion and gravity. Previous studies on this topic measured the SV using a variety of methods possibly affecting the...article 2012
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Looije, R. (author), Mioch, T. (author)Motivation To analyse human errors and determine the underlying reason for these errors, in particular by investigating the error production mechanism cognitive lockup. Research approach A within subjects experiment has been conducted with 16 pilots in a high-fidelity and realistic environment. The independent variables were the cognitive task...conference paper 2011
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Li, P. (author), Oosterling, J.A.J. (author), Hoogstrate, A.M. (author), Langen, H.H. (author), Munnig Schmidt, R.H. (author)In experiments of machining hardened tool steels (such as AISI H11, H13, and D2, up to 56 HRC) by commercial Ø 0.5 mm square endmills, it is observed that the tested micro endmills showed severe wear at an early stage of the process due to chipping off around cutting edge corners, resulting in unsatisfactory tool life and product appearance ...article 2011
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- Haerkens, M.H.T.M. (author), Simons, M. (author), Kuipers, A. (author) article 2011
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Weiss, M. (author), Vermeulen, A. (author), Bos, J. (author), Bucco, D. (author)The Adjoint Method is a well establised tool for assessement of guidance loops in conceptual design studies. It allows one to perform quick assessments of the performance both in deterministic settings, to determine a nominal or average miss distance, and in stochastic settings, to determine the standard deviation of the miss distance. The...conference paper 2011