Publications de Adrian Wägli | EPFL Graph Search

Fault Detection and Isolation in Multiple MEMS-IMUs Configurations

Adrian Wägli, Jan Skaloud, Stéphane Guerrier

This research presents methods for detecting and isolating faults in multiple micro-electro-mechanical system inertial measurement unit (MEMS-IMU) configurations. First, geometric configurations with n sensor triads are investigated. It is proved that the ...

Institute of Electrical and Electronics Engineers2012

Noise reduction and estimation in multiple micro-electro-mechanical inertial systems

Adrian Wägli, Jan Skaloud, Stéphane Guerrier

This research studies the reduction and the estimation of the noise level within a redundant configuration of low-cost (MEMS-type) inertial measurement units (IMUs). Firstly, independent observations between units and sensors are assumed and the theoretica ...

Institute of Physics2010

Optimization of two GPS/MEMS-IMU integration strategies with application to sports

Adrian Wägli, Jan Skaloud

The application of low-cost L1 GPS receivers integrated with micro-electro-mechanical system (MEMS) inertial measurement units (IMU) allows the continuous observation of position, velocity and orientation which opens new possibilities for comparison orf at ...

Springer Verlag2009

The use of wavelet transform for an automated initialization in GPS/MEMS-IMU integration

Adrian Wägli, Jan Skaloud, Heidi Fournier

The main objective of this research is in automating the initialization phase of the MEMS-IMZ/GPS data integration. The motivation for this study is the special case where the before mentioned sensors are worn on a body (e.g. of an athlete) and where the u ...

2009

Trajectory determination and analysis in sports by satellite and inertial navigation

Adrian Wägli

This research presents methods for performance analysis in sports through the integration of Global Positioning System (GPS) measurements with Inertial Navigation System (INS). The described approach focuses on strapdown inertial navigation using Micro-Ele ...

EPFL2009

Le filtre de Kalman unscented - outil performant en géodésie cinématique

Adrian Wägli, Jan Skaloud, Véronique Constantin

Le filtre de Kalman étendu (EKF) est un algorithme très répandu en estimation séquentielle. Celui-ci permet l'estimation de variables d'état et de leur covariance à l'aide de modèles. Pour ca faire, une linéarisation de ces modèles est nécessaire, ce qui c ...

2008

Accurate Trajectory and Orientation of a Motorcycle derived from low-cost Satellite and Inertial Measurement Systems

Christophe Prongué, Alain Schorderet, Adrian Wägli, Jan Skaloud

Inertially aided satellite positioning can bring its benefits to all disciplines in which detailed knowledge of the trajectory is a prerequisite for improving performance. In motorcycling for instance, the determination of slips of tires requires the deter ...

2008

L'analyse de performance sportive à l'aide d'un système GPS/INS low-cost: évaluation de capteurs inertiels de type MEMS

Adrian Wägli, Jan Skaloud, Jean-Marie Bonnaz

Les skieurs s'intéressent au GPS (Global Positioning System) pour évaluer leurs performances. Les positions enregistrées durant les entraînements et les courses permettent d'analyser les trajectoires et de comparer vitesses, accélérations et autres paramèt ...

2007

Turning Point - Trajectory Analysis for Skiers

Adrian Wägli, Jan Skaloud

As with a growing number of athletes, competitive skiers are looking to GNSS technology to help evaluate and improve their performance. Positions logged during practice runs or races can be transformed into 3-D models of the exact trajectories skied to mea ...

2007

Surveillance géodésique par GPS: une approche régionale

Adrian Wägli, Pierre-Yves Gilliéron, Ludovic Rey

Depuis quelques années les réseaux géodésiques nationaux sont équipés d'un certain nombre de stations GPS permanentes. Les systèmes et cadres de coordonnées sont ainsi disponibles aisément et permettent un rattachement efficace et cohérent d'autres réseaux ...

2006

SARFOS - Search And Rescue Forward Operation Support System

Adrian Wägli

Mountain search and rescue in the Alps of Austria and Switzerland is a prominent and challenging example of emergency response tasks. Significant numbers of search and rescue operations are carried out every year. In Switzerland, the "Alpine Rettung" in 20 ...

2005