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Vos, J. (author), Houben, M.M.J. (author)In a laboratory study, the indoor annoyance caused by the sound produced by aircraft during the takeoff on the runway is investigated. This aircraft sound is dominated by relatively high sound levels in the 16 and 31.5 Hz octave bands. Road-traffic and passenger railway sounds, which lack high sound levels in these octave bands, are included as...article 2022
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Oprins, E. (author), Mol, D. (author), Bottenheft, C (author)Helicopter aircrew from Royal Netherlands Air Force (RNLAF) get Helicopter Underwater Egress Training (HUET) in order to be prepared for escaping the aircraft when ditching into water. Besides knowledge and skills how to escape, self-confidence is an important learning goal in HUET, especially because the underwater events are experienced as...public lecture 2019
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Bottenheft, C. (author), Oprins, E.A.P.B. (author), Houden, M.M.J. (author), Meeuwsen, T. (author), Valk, P.J.L. (author)BACKGROUND: Royal Netherlands Air Force (RNLAF) helicopter aircrew get Helicopter Underwater Egress Training (HUET) using a Modular Egress Training Simulator (METS™) in order to be prepared for escaping the aircraft when ditching into water. In the current situation the retraining intervals are only chosen on an arbitrary basis for different...article 2019
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Maljaars, J. (author)handrail. This paper demonstrates that aluminium alloys are in principle also suited for heavy loaded structures, such as decks of traffic bridges and helicopter landing platforms. Recent developments in fatigue research is discussed and future research, required for full application of aluminium in heavy loaded structures is identified. The...conference paper 2016
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Molchanov, P. (author), Harmanny, R.I.A. (author), de Wit, J.J.M. (author), Egiazarian, K. (author), Astola, J. (author)The popularity of small unmanned aerial vehicles (UAVs) is increasing. Therefore, the importance of security systems able to detect and classify them is increasing as well. In this paper, we propose a new approach for UAVs classification using continuous wave radar or high pulse repetition frequency (PRF) pulse radars. We consider all steps of...article 2014
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Simons, M. (author), Wilschut, E.S. (author), Valk, P.J.L. (author)Introduction : Dutch North Sea helicopter operations are characterized by multiple sector flights to offshore platforms under difficult environmental conditions. In the context of a Ministry of Transport program to improve safety levels of helicopter operations, we assessed effects of pre-duty sleep, pre-duty travel time, and workload factors on...article 2011
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- Kastelein, R.A. (author), Hoek, L. (author), de Jong, C.A.F. (author) article 2011
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Jansen, C. (author), Wennemers, A.S. (author), Vos, W.K. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author), DenV (author)Helicopter landings are more challenging in 'brownout' conditions, in which sand and dust is stirred up by the rotary wing aircraft, obscuring visibility. Safe brownout landings require new sensor and display technologies to provide the pilot with information on helicopter motion. In this respect tactile displays are promising: The pilot can...conference paper 2008
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Jansen, C. (author), Wennemers, A. (author), Vos, W. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)Helicopter landings are more challenging in brownout conditions, in which sand and dust is stirred up by the rotary wing aircraft, obscuring visibility. Safe brownout landings require new sensor and display technologies to provide the pilot with information on helicopter motion. In this respect tactile displays are promising: The pilot can...conference paper 2008
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Reffeltrath, P.A. (author), TNO Defensie en Veiligheid (author)Background: Helicopter pilots are often exposed to periods of high heat strain, especially when wearing survival suits. Therefore, a prototype of a ventilated vest was evaluated on its capability to reduce the heat strain of helicopter pilots during a 2-h simulated flight. Hypothesis: It was hypothesized that the ventilated vest would reduce...article 2006
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Jansen, C. (author), de Vries, S.C. (author), Duistermaat, M. (author), TNO Defensie en Veiligheid (author)Future Unmanned Aerial Vehicles (UAV) will collaborate more directly with military manned aircraft. TNO Defence, Security and Safety investigated how to present UAV sensor images in a fighter aircraft cockpit in order to maximize target identification and flying performance. Ten military pilots performed several Close Air Support missions in a...conference paper 2006
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Grob, M.J.H.B. (author), TNO Defensie en Veiligheid (author)Maritime surface surveillance is the process of obtaining and maintaining information about surface ships in a certain sea area. It is carried out by maritime platforms such as frigates, helicopters or maritime patrol aircraft. Surface surveillance plays a vital role in maritime operations like trade embargo operations, counterdrug operations...article 2006
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Ellerbroek, J. (author), Stroosma, O. (author), Wentink, M. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)The three Dutch research institutes NLR, TNO and TU Delft are collaborating to perform a multi-simulator follow-up study aimed at investigating the influence of yaw and translational motion cues in helicopter- and general flight-simulation. In this study, new experimental results will be combined with pilot modeling. Two experiments will be...conference paper 2006
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Vermeulen, J.F.J. (author), van den Brink, M. (author), TNO Defensie en Veiligheid (author)We investigate a two-sided, multi-stage search problem where a continuous search effort is made by one or more search units to detect a moving target in a continuous target space, under noisy detection conditions. A specific example of this problem is hunting for an enemy submarine by naval forces. So far, this problem has not been solved,...article 2005
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Crabtree, B. (author), Abel, S. (author), Dancer, A.L. (author), Buck, K. (author), Wessling, T. (author), Steeneker, H.J.M. (author), Verhave, J. (author), James, S.H. (author), Rood, G. (author), McKinley, R. (author)Hearing protection with standard passive earmuffs is for many military applications insufficient. Low frequency noises (diesel engines, helicopter rotor) require increased attenuation. Active Noise Reduction (ANR) is specifically suited for reduction at low frequencies. Assessment of ANR for military applications is an important topic as the...report 2004
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van Erp, J.B.F. (author), Veltman, J.A. (author), van Veen, H.A.H.C. (author), Oving, A.B. (author)The degraded visual infoflllation when hovering with Night Vision Goggles may induce drift that is not noticed by the pilot. We tested the possibilities of counteracting these effects by using a tactile torso display. The display consisted of 64 vibro-tactile elements and presented infoflllation on the desired direction of motion only (simple...conference paper 2003
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Waagmeester, C.D. (author), van Ratingen, M.R. (author), Giavotto, V. (author), Notarnicola, L. (author), Goldner, S. (author), TNO Wegtransportmiddelen (author)Following an integral approach unique in aircraft safety, the European HeliSafe project aims to improve the survivability of helicopter crashes and to reduce the risk at injuries for occupants in cockpit and cabin. In the project, a modified FAA-Hybrid III is used for the baseline-, design- and concept validation tests based on helicopter crash...conference paper 2002
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TNO Fysisch en Elektronisch Laboratorium (author), van Koersel, A.C. (author), Beerens, S.P. (author)Measurements of different types of aircraft are performed and used to obtain information on target characteristics and develop an algorithm to perform classification between jet aircraft, propeller aircraft and helicopters. To obtain a larger detection range, reduce background noise and to reduce classification errors in a multi-target...conference paper 2002
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van Koersel, A.C. (author), TNO Fysisch en Elektronisch Laboratorium (author)The possibility to detect the passage of aircraft (either propeller or jet) with one or more mechanical wave sensors (acoustic or seismic) is investigated. An existing algorithm-sensor demonstator can detect and classify helicopter targets. In its current form it is developed to reject other targets. The current work is performed to find out if...conference paper 2001
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TNO Fysisch en Elektronisch Laboratorium (author), van Koersel, A.C. (author)A technology demonstrator that detects and classifies different helicopter types automatically, was developed at TNO-FEL. The demonstrator is based on a PC, which receives its acoustic input from an all-weather microphone. The demonstrator uses commercial off-the-shelf hardware to digitize the acoustic signal. The user-interface and the signal...conference paper 2000
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