Searched for: department%3A%22Aerospace%255C%252BDesign%252C%255C%252BIntegration%255C%252Band%255C%252BOperations%22
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Podgaets, A.R. (author), Ockels, W.J. (author)
A new innovative approach to sailing has been proposed by TU Delft. It allows sailing in any desired direction, including straight into the wind. The concept consists of generating energy with a sky sail and then using it in an electric motor of the ship. The paper describes a mathematical model of laddermill sail.
conference paper 2007
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Podgaets, A.R. (author), Ockels, W.J. (author)
Laddermill flight control problem with closed loop is considered in this paper. Laddermill is an alternative concept for energy production using high altitude kites. The kites have been simulated as rigid bodies and the cable as a thin elastic line. Euler angles and cable speed are controls. Flight control is written as a fusion of two...
conference paper 2007
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Breukels, J. (author), Ockels, W.J. (author)
For the purpose of ultimately building a fully dynamic simulation of kites, an investigation is launched into a viable model of the cable with which the kite is attached to the ground. In the model proposed in this paper, only the slow modes of motion are taken into account due to the fact that only the slow motions have a real effect on the...
conference paper 2007
document
Podgaets, A.R. (author), Ockels, W.J. (author)
Laddermill sail is an innovative approach to propel the ship with the power generated by kites. The first Laddermill system is currently being designed however existing mathematical models of the system produce different optimal recommendations. Thus a decision has been made to step back and to take a closer look at the mathematical models of...
conference paper 2007
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Ockels, W.J. (author)
From his personal experience during a space flight (Challenger 1985) onward, the author has been struck repeatedly by the remarkable influence of Earth's environment on life, in particular by its most inevitable elements: time and gravity. Our life might be peculiar to the local Earth conditions, and not cosmic per se. In this article the...
conference paper 2007
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Williams, P. (author), Lansdorp, B. (author), Ockels, W. (author)
Non-powered flight vehicles such as kites can provide a means of transmitting wind energy from higher altitudes to the ground via tethers. Although there have been many proposals for systems to extract wind energy from higher altitudes, this paper focuses on the use of a light lifting body at the end of a tether to generate useful power. Two...
conference paper 2007
document
Podgaets, A.R. (author), Ockels, W.J. (author)
Closed loop Laddermill flight control problem is considered in this paper. Laddermill is a high altitude kites system for energy production. The kites have been simulated as rigid bodies and the cable as a thin elastic line. Euler angles and cable speed are controls. Flight control is written as a fusion of two approaches: design of experiments...
conference paper 2007
document
Breukels, J. (author), Ockels, W.J. (author)
This paper presents the various structural considerations in designing a large inflatable kiteplane. Material issues are addressed and a departure from conventional inflatable kites is suggested by using a single material instead of a structural foil and an internal gas barrier. Furthermore, rigging the kite using bridle lines is given attention...
journal article 2007
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Breuer, J. (author), Ockels, W. (author), Luchsinger, R.H. (author)
The paper describes the new concept Tensairity which can be used to significantly improve the load bearing capacity of inflatable wings. The basic principle of Tensairity is to use an inflatable structure to stabilize conventional compression and tension elements. So far, Tensairity has been mainly used in civil engineering application like roof...
journal article 2007
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Podgaets, A.R. (author), Ockels, W.J. (author)
One of novel concepts to use the energy of high altitude winds is by launching a series of kite on a long rope and let them pull the rope thus driving the generator. A mathematical model of tethered kites system has been developed consisting of models of kites and of the cable that links them together and to the generator on the ground energy...
conference paper 2006
Searched for: department%3A%22Aerospace%255C%252BDesign%252C%255C%252BIntegration%255C%252Band%255C%252BOperations%22
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