Infomaterial und Publikationen

Juni 2018

Inverse Dynamics for Discrete Geometric Mechanics of Multibody Systems With Application to Direct Optimal Control

Journal of Computational and Nonlinear Dynamics

In this paper, we present efficient algorithms for computation of the residual of the constrained discrete Euler–Lagrange (DEL) equations of motion for tree structured, rigid multibody systems. In particular, we present new recursive formulas for computing partial derivatives of the kinetic energy.

04. - 05.10.2017

Kognitive Modelle zur virtuellen Absicherung der mentalen Belastung bei Montagetätigkeiten

28. DfX-Symposium

Bei der Absicherung von Montagetätigkeiten wird anhand von Digitalen Menschmodellen die physische Ergonomie bewertet. Eine Einschätzung der psychischen Beanspruchung steht bisher noch aus. Ein Ansatz ist die Kopplung des Digitalen Menschmodells mit kognitiven Modellen. Anhand dieser kann die kognitive Beanspruchung ermittelt werden und trägt zur ganzheitlichen Bewertung von Montagetätigkeiten bei.

20. - 23.08.2017

Virtual test persons based on diverse anthropometric data for ergonomics simu­lations and analysis

49th NES 2017 Conference" Joy at Work", Lund

This paper describes a study where diverse anthropometric data is included in the process of generating data for a group of virtual test persons. Data on body size, strength and ROM were either collected on an individual level or predicted and synthesized and then used in cluster analyses to generate six unique virtual test persons.

17. - 21.07.2017

Development of an ergonomic evaluation tool for health-promoting physical workplaces

International Conference on Physical Ergonomics and Human Factors

There is evidence that modern sedentary lifestyle is a risk factor for health, while ergonomics tends to overprotect the work force by limiting physical activity during working hours. The paper reports on the development of an Ergonomics assessment tool for simulation and field analysis. It follows a bandwidth approach targeting a balanced physical workload and is based on a review on existing evaluation methods for physical aspects of work routines and on health promotion.

17. - 21.07.2017

Visual Feedback for Grasping in Virtual Reality Environments for an Interface of Instruct Digital Human Models

International Conference on Applied Human Factors and Ergonomics

Digital Human Models (DHMs) are widely used in big industry whereas they are not used in small and medium-sized enterprises. One of the main reasons is the complexity and usability. Engineers need a notable amount of training to be able to use DHM software. The authors suggest a new interactive Virtual Reality (VR) interface to instruct DHMs.

01. - 05.07.2017

Ternary sparse matrix representation for volumetric mesh subdivision and processing on GPUs

15th Symposium on Geometry Processing

In this paper, we present a novel volumetric mesh representation suited for parallel computing on modern GPU architectures. The data structure is based on a compact, ternary sparse matrix storage of boundary operators. Boundary operators correspond to the first-order top-down relations of k-faces to their (k-1)-face facets. The compact, ternary matrix storage format is based on compressed sparse row matrices with signed indices and allows for efficient parallel computation of indirect and bottom-up relations. This representation is then used in the implementation of several parallel volumetric mesh algorithms including Laplacian smoothing and volumetric Catmull-Clark subdivision. We compare these algorithms with their counterparts based on OpenVolumeMesh and achieve speedups from 3x to 531x, for sufficiently large meshes, while reducing memory consumption by up to 36%.

15. - 17.02.2017

Entwicklung eines ergonomischen Bewertungstools für gesundheitsförderliche physische Arbeit

Frühjahrskongress der Gesellschaft für Arbeitswissenschaft

Der Beitrag beschreibt die Entwicklung eines ergonomischen Bewertungssystems für die Arbeitsplatzgestaltung. Es ist für den Einsatz mit digitalen Menschmodellen im Rahmen der konzeptiven Ergonomie als auch mit physiologischen Messsystemen für die korrektive Ergonomie vorgesehen. Neben klassischen, protektiven Bewertungsmethoden zur Vermeidung von Überforderung werden zusätzlich Methoden zur Vermeidung von Unterforderung eingeführt. Durch die Förderung ausgewogener Arbeitsabläufe wird ein salutogener Effekt erzielt.

06. - 07.10.2016

Anforderungsanalyse einer Montage­si­mu­la­tions­soft­ware zwecks Aufwands­minimierung manueller Kon­fi­gu­ra­tions­auf­ga­ben

8. VDI/VDE-Fachtagung Useware 2016. Mensch-Technik-Interaktion im Industrie 4.0 Zeitalter

Die Konfiguration von Digitalen Menschmodellen zur Absicherung von Montagetätigkeiten erfolgt heute manuell. Eine Aufgabenanalyse zeigt sowohl die Arbeitsschritte als auch die zu treffenden Entscheidungen auf. Insbesondere die Entscheidungen basieren ausschließlich auf Erfahrungswerten des Montageplaners. Es werden Anforderungen formuliert und ein Lösungskonzept vorgestellt, um die Usability der Konfiguration zu verbessern.

VDI-Berichte 2271. S. 15-24, VDI Verlag, Düsseldorf.

17. - 22.07.2016

Instruction of Digital Human Models Through Interaction in Immersive Virtual Environments

18th International Conference on Human-Computer Interaction

The use of digital human models is nowadays complex and needs specific knowledge due to its complex user interface. This paper presents a possible approach to instruct digital human models in virtual reality environments.


Creating and shaping the DHM tool IMMA for ergonomic product and production design

International Journal of the Digital Human 1 (2), 132-152

The history, status and outlook of the research and development actions associated with the creation of the digital human modelling tool intelligently moving manikins (IMMA) are described. The underlying fundamental concepts are described and research and development results so far are illustrated or referred to.

24. - 28.08.2015

Exploiting sparsity in the discrete mechanics and optimal control method with application to human motion planning

IEEE International Conference on Automation Science and Engineering (CASE)

In this paper we propose the use of sparse finite differencing techniques for the Discrete Mechanics and Optimal Control method. In particular we show how to efficiently construct estimates of the Jacobian and Hessian matrices when the dynamics of the optimal control problem is discretized using a variational integrator.

Weitere Veröffentlichungen

  • Mueller-Roemer, J. S. (2017). Ternary Sparse Matrix Representation for Volumetric Mesh Subdivision and Processing on GPUs. (pp. 36:5:1467-8659). London: Computer Graphics Forum.