This paper demonstrates the possibility to detect suspension failures of railway vehicles using a multiple-model approach from on-board measurement data. The railway vehicle model used includes the lateral and yaw motions of the wheelsets and bogie, and the lateral motion of the vehicle body, with sensors measuring the lateral acceleration and yaw rate of the bogie, and lateral acceleration of ...

BACKGROUND Previous attempts to measure otolith function using ocular counter-rolling have shown poor sensitivity and specificity, thereby hindering a useful clinical application. We have conducted a study to investigate whether thresholds for the perception of the direction of linear acceleration might be an alternative for the clinical evaluation of otolith or statolith function. METHODS Pe...

background, aims, methods, results) max 200 words: Tilting trains reduce the perceived lateral acceleration for the passengers by tilting the car-body to improve the ride comfort. However, some susceptible passengers may experience nausea. To study the influence from either lateral accelerations and/or simultaneous roll motions, a simulator study was undertaken. About 40 subjects were taking pa...

Modelling and prediction of motion sickness and nausea from vertical and horizontal accelerations have been investigated and developed through the combined efforts of many researchers. Vertical accelerations have been reported to have a strong influence on nausea, but less is known about the influence of roll motion. For tilting trains, where the tilt motion is used for reducing the lateral acc...

Accelerations and braking of vehicles can be measured and analyzed with different systems and software. In our case, we used the system G-Tech Pro Performance Meter RR w and Performance Analysis System Software (PASS). This system enables measurements of longitudinal accelerations, lateral accelerations and braking. PASS software has two options, the first is Drag Runs, which is designed for th...

The purpose of this research was to examine the effects of voluntarily manipulating muscle activation and localized muscle fatigue on tibial response parameters, including peak tibial acceleration, time to peak tibial acceleration, and the acceleration slope, measured at the knee during unshod heel impacts. A human pendulum delivered consistent impacts to 15 female and 15 male subjects. The tib...

BACKGROUND In adults, walking economy declines with increasing age and negatively influences walking speed. This study aims at detecting determinants of walking economy from body acceleration during walking in an ageing population. METHODS 35 healthy elderly (18 males, age 51 to 83 y, BMI 25.5±2.4 kg/m2) walked on a treadmill. Energy expenditure was measured with indirect calorimetry while bo...

background, aims, methods, results) max 200 words: Low frequency vertical accelerations can provoke motion sickness and nausea in ships and aeroplanes and probably, combined with horizontal (lateral) acceleration, also in cars and buses. However, tilting trains and banking aeroplanes generate roll motions, which may provoke motion sickness in motion sickness sensitive humans. Some seventy healt...