Searched for: author:"Schwab, A.L."
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Dialynas, G. (author), Happee, R. (author), Schwab, A.L. (author)
With the resurgence in bicycle ridership in the last decade and the continuous increase of electric bicycles in the streets a better understanding of bicycle rider behaviour is imperative to improve bicycle safety. Unfortunately, these studies are dangerous for the rider, given that the bicycle is a laterally unstable vehicle and most of the...
journal article 2019
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Baines, P.M. (author), Schwab, A.L. (author), van Soest, AJ (author)
Metabolic energy expenditure during human gait is poorly understood. Mechanical energy loss during heel strike contributes to this energy expenditure. Previous work has estimated the energy absorption during heel strike as 0.8 J using an effective foot mass model. The aim of our study is to investigate the possibility of determining the energy...
journal article 2018
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Schwab, A.L. (author), Dialynas, G. (author), Happee, R. (author)
The bicycle, being unstable at low speed and marginally stable at high speed, is sensitive to lateral perturbations. One of the major lateral perturbations is crosswind, which can lead to accidents and fatalities. Here we investigate the effect of crosswind on the lateral dynamics and control of the bicycle in a wide range of forward speeds and...
conference paper 2018
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Reijne, M.M. (author), Bregman, D.J.J. (author), Schwab, A.L. (author)
Descend technique and performance vary among elite racing cyclists and it is not clear what slower riders should do to improve their performance. An observation study was performed of the descending technique of members of a World Tour cycling team and the technique of each member was compared with the fastest descender amongst them. The...
conference paper 2018
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van der Kruk, E. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author), Schwab, A.L. (author)
The quantification of mechanical power can provide valuable insight into athlete performance because it is the mechanical principle of the rate at which the athlete does work or transfers energy to complete a movement task. Estimates of power are usually limited by the capabilities of measurement systems, resulting in the use of simplified power...
review 2018
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De Jong, Jenny (author), Fokkink, R.J. (author), Olsder, G.J. (author), Schwab, A.L. (author)
In a cycling time trial, the rider needs to distribute his power output optimally to minimize the time between start and finish. Mathematically, this is an optimal control problem. Even for a straight and flat course, its solution is non-trivial and
involves a singular control, which corresponds to a power that is slightly above the aerobic...
journal article 2017
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Schwab, A.L. (author), Meijaard, J.P. (author)
It can be observed that there is a wide variety in the width of bicycle lanes. It can range from wide to very narrow, see figure 1. Several guidelines disagree on the desired width of a bicycle lane [1, 2]. These guidelines are mainly based on observations and best practices. Instead of such an evolutionary approach
we propose to determine...
conference paper 2017
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Lee, O.Z.A. (author), Dialynas, G. (author), de Winter, J.C.F. (author), Happee, R. (author), Schwab, A.L. (author)
Recent years have seen an increase in cycling as a transport mode in urban centers. This has spurred an interest in the use of bicycle simulators to study cyclist behavior [1, 2, 3, 4]. However, few implement a model based approach that couples the bicycle roll and steer in a realistic manner [5]. Balancing is a key task in cycling and we aimed...
conference paper 2017
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van der Kruk, E. (author), van der Helm, F.C.T. (author), Schwab, A.L. (author), Veeger, H.E.J. (author)
Pushoff in speed skating requires an extensive motion strategy. During speed skating the skater continuously changes the lean and steering angle of the skate and therewith the direction of push-off, The forces in an inertial coordinate system can give insight into what amount of the push-off force is directed into the forward motion. In this...
conference paper 2016
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van der Kruk, E. (author), den Braver, O. (author), Schwab, A.L. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)
In the current project, we aim to provide speed skaters with real-time feedback on how to improve their skating performance within an individual stroke. The elite skaters and their coaches wish for a system that determines the mechanical power per stroke. The push-off force of the skater is a crucial variable in this power determination. In...
journal article 2016
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de Jong, J. (author), Fokkink, R.J. (author), Olsder, G.J. (author), Schwab, A.L. (author)
The optimal pacing strategy of a cyclist in an individual time-trial depends on terrain, weather conditions and the cyclists endurance capacity. Previous experimental and theoretical studies have shown that a suboptimal pacing strategy may have a substantial negative effect. In this paper we express the optimal pacing problem as a...
conference paper 2016
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van der Kruk, E. (author), Schwab, A.L. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)
To assist speed skaters in improving their skating performance, we would like to provide them with real time feedback on the orientation of the skate within a single stroke. While of course the forces generated by the skater on the ice determine the acceleration of the skater, the orientation of the skate determines in which direction this...
conference paper 2016
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Kovacsova, N. (author), Di Gesu, M. (author), Schwab, A.L. (author), Gubitosa, M. (author), Hagenzieker, M.P. (author), De Winter, J.C.F. (author)
journal article 2015
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Kovacsova, N. (author), Di Gesu, M. (author), Schwab, A.L. (author), Gubitosa, M. (author), Hagenzieker, M.P. (author), De Winter, J.C.F. (author)
conference paper 2015
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Kovácsová, N. (author), De Winter, J.C.F. (author), Schwab, A.L. (author), Hagenzieker, M.P. (author)
conference paper 2014
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Schwab, A.L. (author), Kooijman, J.D.G. (author)
The goal of the Human Power Team from the TU Delft and the Free University of Amsterdam is to break the world speed record in unpaced cycling (Sam Whittingham, 133.28 km/h). The design of such a faired recumbent bicycle is a challenge. The Delft design, called VeloX (Human Power Team (2013)), is a fully-faired monocoque front-driven recumbent...
conference paper 2014
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Twisk, D.A.M. (author), Boele, M.J. (author), Vlakveld, W.P. (author), Christoph, M. (author), Sikkema, R. (author), Remij, R. (author), Schwab, A.L. (author)
To study the safety of e-bikes for the elderly, an experimental field study was conducted, using instrumented bicycles and comparing two age groups: older cyclists, n= 29, mean age = 70, SD = 4.2 and middle-aged cyclists, n = 29, mean age = 38, SD = 4.3. All were regular cyclists. They rode a fixed route with a length of about 3.5 km: once on an...
conference paper 2013
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Moore, J.K. (author), Kooijman, J.D.G. (author), Schwab, A.L. (author), Hubbard, M. (author)
Recent observations of a bicyclist riding through town and on a treadmill show that the rider uses the upper body very little when performing normal maneuvers and that the bicyclist may, in fact, primarily use steering input for control. The observations also revealed that other motions such as lateral movement of the knees were used in low...
journal article 2010
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Moore, J.K. (author), Hubbard, M. (author), Schwab, A.L. (author), Kooijman, J.D.G. (author), Peterson, D.L. (author)
An overview of bicycle and rider kinematic motions from a series of experimental treadmill tests is presented. The full kinematics of bicycles and riders were measured with an active motion capture system. Motion across speeds are compared graphically with box and whiskers plots. Trends and ranges in amplitude are shown to characterize the...
journal article 2010
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Wisse, M. (author), Schwab, A.L. (author), van der Linde, R.Q. (author), van der Helm, F.C.T. (author)
journal article 2005
Searched for: author:"Schwab, A.L."
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