This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Strength Based Discomfort Model of Posture and Movement
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2004 by SAE International in United States
Annotation ability available
The Lehrstuhl für Ergonomie of the Technische Universität München is working on a generalized strength based discomfort model of posture and movements. By evaluating individual discomfort feelings of subjects regarding different postures, movements and different levels of force the first steps to find this function are realized. Different measuring machines permit the measuring of torques / force moments inside all joints of the human body. The individual feeling of discomfort is evaluated by using the CP50-scale for every fixed joint angle as well as every measured value. Discomfort is depending as well on the posture as on the level of force applied in a certain posture. Additionally the direction in which a certain force has to be applied influences discomfort feelings. Regarding different levels of force applied in a fixed posture the discomfort feeling increases linear with growing percentages of the maximal force/torque. Discomfort functions are calculated for every direction of every degree of freedom of the measured joints. By the analysis of movements and the definition of every discomfort value for every joint angle in combination with an applied percentage of the maximal torque it will be possible to validate a general discomfort model for human motion. The basis for this approach is the knowledge that the evaluation of discomfort for a complete movement is determined by the maximal discomfort felt in one joint or body part.
CitationZacher, I. and Bubb, H., "Strength Based Discomfort Model of Posture and Movement," SAE Technical Paper 2004-01-2139, 2004, https://doi.org/10.4271/2004-01-2139.
- Marach, A. 1999 CAD-fähiges Prognosemodell für statische Körperhaltungen des Menschen Dissertation am Lehrstuhl für Ergonomie der Technischen Universität München
- Bubb, H. Wang, X. 2002 General approach of discomfort modeling th
- Bubb, H. 2003 Research for a strength based discomfort model of posture and movement
- Schaefer, P. Rudolph, H. Schwarz, W. Digital man models and physical strength - a new approach in strength simulation SAE Proceedings: digital human modeling for design and engineering Dearborn 2000
- Schaefer, P. Rudolph, H. Schwarz, W. Load evaluation by digital man models - a radical new 3 D-approach realized by RAMSIS IEA Proceedings San Diego 2000
- Straker, L.M. Body Discomfort Assessment Tools, 1999 Curtin University of technology, Shenton Park, Australia
- Bathmager, V. Drury, C. Schiro, S. 1985 Posture, Postural Discomfort and Performance Human factors 27 189 199
- Boussenna, M. Corlett, E.N. Pheasant, S.T. 1982 The relation between discomfort and postural loading ath the joints Ergonomics 25 4 315 322