Publications by Volker Gass | EPFL Graph Search

Multi-scale and multi-energy non-destructive X-ray analysis of the European Retrievable Carrier (EURECA)

The reduction in costs for space travel and scientific experiments in microgravity raises the question of equipment reusability. This goal can only be achieved if the space travel associated system degradations are fully understood. Non-destructive analysi ...

2025

Modelling and Optimisation of High Temperatures Heat Pipe Radiators for Nuclear Electrical Propulsion (NEP) Applications

Volker Gass

International Astronautical Federation (IAF)2024

An Empirical and Subjective Model of Upper Extremity Fatigue Under Hypogravity

Claude Nicollier, Volker Gass, Tatiana Maillard

In the context of extra-terrestrial missions, the effects of hypogravity (0 < G < 1) on the human body can reduce the well-being of the crew, cause musculoskeletal problems and affect their ability to perform tasks, especially during long-term missions. To ...

FRONTIERS MEDIA SA2022

Investment casting of periodic aluminum cellular structures using slurry-cast table salt moulds

Andreas Mortensen, Florian Thibaut Gallien, Volker Gass

A process is presented for the production of periodic cellular structures based on investment casting of Al-12 wt%Si alloy within a mould that is made of table salt (NaCl) packed around a sacrificial PLA polymer template. Moulding begins by pouring salt gr ...

2022

Use of space analog missions as an educational tool in primary schools

Volker Gass

Space exploration is a field that inspires a wide range of people, from children to university students, including the general public. With a return to the Moon planned for 2024 and the rapid expansion of the private industry, educating the next generation ...

PERGAMON-ELSEVIER SCIENCE LTD2022

Can automotive MEMS be reliably used in space applications? An assessment method under sequential bi-parameter testing

Maxime Auchlin, Volker Gass, Olha Sereda

Commercial Off-The-Shelf (COTS) automotive inertial measurement units were subjected to severe accumulative stress conditions: thermal shocks (high temperature gradients), temperature cycling (low gradients) and mechanical vibration are combined in an A-th ...

PERGAMON-ELSEVIER SCIENCE LTD2020

X-ray pulsar-based GNC system for formation flying in high Earth orbits

Camille Sébastien Pirat, Volker Gass

In this paper, comprehensive pulsar-based Guidance, Navigation and Control (GNC) system is designed and applied to satellites formation flying. The complete autonomy of the X-ray pulsar navigation technology provides both absolute and relative positioning ...

PERGAMON-ELSEVIER SCIENCE LTD2020

H∞ and μ-Synthesis for Nanosatellites Rendezvous and Docking

Camille Sébastien Pirat, Volker Gass

In this brief, the nanosatellite rendezvous and docking problem is tackled. It was never attempted for small spacecraft, as critical technologies, such as six-degree-of-freedom (DoF) micropropulsion systems, have only recently become available due to advan ...

2019

Small satellites for space science A COSPAR scientific roadmap

Jie Wu, Maurice Borgeaud, Volker Gass

This is a COSPAR roadmap to advance the frontiers of science through innovation and international collaboration using small satellites. The world of small satellites is evolving quickly and an opportunity exists to leverage these developments to make scien ...

ELSEVIER SCI LTD2019

Vision Based Navigation for Autonomous Cooperative Docking of CubeSats

Camille Sébastien Pirat, Volker Gass

A realistic rendezvous and docking navigation solution applicable to CubeSats is investigated. The scalability analysis of the ESA Autonomous Transfer Vehicle Guidance, Navigation & Control (GNC) performances and the Russian docking system, shows that the ...

2018

Time and Covariance Threshold Triggered Optimal Uncooperative Rendezvous Using Angles-Only Navigation (vol 2017, 5451908, 2017)

Jean-Philippe Thiran, Christophe Dominique Paccolat, Volker Gass, Yue You

HINDAWI LTD2018

Guidance, Navigation and Control for Autonomous Cooperative Docking of CubeSats

Camille Sébastien Pirat, Pierre-Alain Mäusli, Volker Gass

Is it possible to dock CubeSats in Low Earth Orbit? The challenges are mainly associated with the level of miniaturisation. A docking mechanism was designed, built and tested in the laboratory. Results show that a relative precision better than 1 cm and 2 ...

2018

Mission Design and GNC for In-Orbit Demonstration of Active Debris Removal Technologies with CubeSats

Reto Wiesendanger, Christophe Dominique Paccolat, Muriel Richard, Federico Belloni, Camille Sébastien Pirat, Volker Gass

Within the frame of the ESA's General Support Technology Programme, two In-Orbit Demonstration (IOD) missions using CubeSat technologies were studied. These IODs aim at alleviating the technical risk inherent to new technologies required for Active Debris ...

Elsevier2017

Rollable Multisegment Dielectric Elastomer Minimum Energy Structures for a Deployable Microsatellite Gripper

Samuel Rosset, Herbert Shea, Muriel Richard, Jun Shintake, Volker Gass, Irina Gavrilovich, Oluwaseun Adelowo Araromi

Debris in space presents an ever-increasing problem for spacecraft in Earth orbit. As a step in the mitigation of this issue, the CleanSpace One (CSO) microsatellite has been proposed. Its mission is to perform active debris removal of a decommissioned nan ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Non-linear Low-rank and Sparse Representation for Hyperspectral Image Analysis

Jean-Philippe Thiran, Devis Tuia, Frank Grégoire Jean de Morsier, Maurice Borgeaud, Volker Gass

In this paper, we tackle the problem of unsupervised classification of hyperspectral images. We propose a clustering method based on graphs representing the data structure, which is assumed to be an union of multiple manifolds. The method constraints the p ...

2014

Robust Phase-Correlation based Registration of Airborne Videos using Motion Estimation

Jean-Philippe Thiran, Frank Grégoire Jean de Morsier, Maurice Borgeaud, Volker Gass

This paper presents a robust algorithm for the registration of airborne video sequences with reference images from a different source (airborne or satellite), based on phase-correlation. Phase-correlations using Fourier-Melin Invariant (FMI) descriptors al ...

Springer-Verlag2013

Semi-Supervised Novelty Detection using SVM entire solution path

Jean-Philippe Thiran, Devis Tuia, Frank Grégoire Jean de Morsier, Maurice Borgeaud, Volker Gass

Very often, the only reliable information available to perform change detection is the description of some unchanged regions. Since sometimes these regions do not contain all the relevant information to identify their counterpart (the changes), we consider ...

Institute of Electrical and Electronics Engineers2013

Semi-Supervised and Unsupervised Novelty Detection using Nested Support Vector Machines

Jean-Philippe Thiran, Frank Grégoire Jean de Morsier, Maurice Borgeaud, Volker Gass

Very often in change detection only few labels or even none are available. In order to perform change detection in these extreme scenarios, they can be considered as novelty detection problems, semi-supervised (SSND) if some labels are available otherwise ...

Ieee2012

Unsupervised Change Detection via Hierarchical Support Vector Clustering

Jean-Philippe Thiran, Devis Tuia, Frank Grégoire Jean de Morsier, Maurice Borgeaud, Volker Gass

When dealing with change detection problems, information about the nature of the changes is often unavailable. In this paper we propose a solution to perform unsupervised change detection based on nonlinear support vector clustering. We build a series of n ...

2012