Strategies For Less Motion Sickness
On Tilting Trains
Author(s)
R. Persson & B. Kufver
Abstract
Many railways have put tilting trains into operation on lines with horizontal
curves with small radii. Tilting trains have vehicle bodies that can roll inwards,
reducing the lateral acceleration perceived by the passengers. Tilting trains can
therefore run through curves at higher speeds. However, excessive tilt motions
can cause motion sickness in sensitive passengers. On the other hand, too little
tilting will cause discomfort from high lateral acceleration and jerk.
The present paper presents new tilt algorithms aimed at balancing the
conflicting objectives of ride comfort and less motion sickness. An enhanced
approach is taken, where the amount of tilt depends on the local track conditions
and the train speed. The paper shows how selected tilt algorithms influence
certain motion sickness related carbody motions.
Speed profiles designed to avoid local peaks in the risk of motion sickness are
another possibility. The speed profiles for both tilting and non-tilting trains are
today set from safety and comfort perspectives only, thus minimizing the
running time. The present paper shows how speed profiles could be used to
balance the conflicting objectives of running time and less risk of motion
sickness. The result is derived from simulations and put in relation to today’s tilt
algorithms and speed profiles on the Stockholm–Gothenburg main line in
Sweden (457 km).
Keywords: tilting train, tilt algorithm, tilt strategy, passenger comfort, motion
sickness, running time simulation.
Keywords
tilting train, tilt algorithm, tilt strategy, passenger comfort, motion
sickness, running time simulation
Related Book
Other papers in this volume
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