Predictors of Perceived Effort in the Shoulder during Load Transfer Tasks Clark Dickerson, Bernard Martin, and Don B. Chaffin Ergonomics, 50(7):1004-1016, July 2007. The mechanism of muscular effort perception in the shoulder was examined in this experiment. Two shoulder biomechanical models and experimental muscle activity data were used to assess physical exposure for a series of reaching tasks. Effort perception was quantitatively correlated to these measures of physical loading, both at the resultant torque (r2 = 0.50) and muscle activity model-based muscle force predictions (MFPs): r2 = 0.42, electromyography (EMG): r2 = 0.26) levels. Muscle data did not explain variation in effort perception more fully than torque data. The inclusion of subject and task variables improved the ability of each model to explain variability in effort perception (torque: r2 = 0.74, MFP: r2 = 0.67, EMG: r2 = 0.64). These results suggest that effort perception may not be fully explained by only an image of the motor command, but is rather a complex integrative quantity that is affected by other factors, such as posture and task goals, which may be dependent on sensory feedback. abs2007_13
Application of Digital Human Modeling to the Design of ...
The mechanism of muscular effort perception in the shoulder was examined in this experiment. Two shoulder biomechanical models and experimental muscle ...
transition stepping, and stepping for balance maintenance in a single integrated system that can be implemented in any digital human model. abs2007_04.
Percent capable strength predictions and functional balance capabilities were determined for ... 3D Static Strength Prediction Program (3DSSPP). Through this ...
Jun 12, 2007 - manual tasks focus on the analysis of a static posture. ... the dynamics of motion into analysis, most commercial software packages used for ...
... planning and feedback controller was developed using split sample data from a series of reaching experiments on a six degree of freedom motion platform.
the diverse community now developing simulations has a global blueprint for DHM, and is able to work together efficiently. DHM developers and users can save ...
... of features in a single model was explored through examination of both experimental and simulated data with the developed analysis tool. The utility of the model is discussed together with a review of its specific strengths and weaknesses, and th
Page 1 ... current digital human modeling tools require manual manipulation of the digital human to simulate force-exertion postures or rely on optimization procedures that have not been validated. Automated posture prediction based on ...
designed to be independent of any particular human modeling system. The modules are developed as lightweight algorithms based on closed-form equations and simple numerical methods that can be communicated in written form and implemented in any comput
Human Motion Simulation for Vehicle and Workplace Design. Don B. Chaffin ... DHM software, such as Jack, SAFEWORK,. RAMSIS, SAMMIE ... product development process, when he or she is attempting to improve the physical design of ...
Modeling Vehicle Ingress and Egress Using the Human Motion Simulation. Framework. Matthew P. Reed and Stephanie Huang. Presented at the 2008 SAE Digital Human Modeling Conference, Pittsburgh,. Pennsylvania, June 17-19, 2008. SAE Technical Paper 2008-
The study of work-related shoulder disorders has recently elicited an increased amount of attention by scientists. Indeed, load levels in shoulder tissues have ...
figure, rather than through realistic lower-extremity motions. The simulation of the non- cyclical stepping motions accompanying manual material handling pickup and delivery tasks requires manual manikin manipulation. This paper proposes a paradigm f
to the dorsal side of the hand and a 3-D motion capture system recorded the positions of the markers during reaching and grasping. The total distance from start ...
Standing reach envelopes are important tools for the design of industrial and vehicle environments. Previous ... Cost is quantified as the degree to which the.
Application of Digital Human Modeling to the Design of a Postal Delivery Vehicle ... The development of a new carrier rout vehicle for the U.S. Postal Service ...
Presented at the 2008 SAE Digital Human Modeling Conference, Pittsburgh,. Pennsylvania, June ... Yet, current digital human modeling tools used for proactive.
This chapter attempts to make the argument that there are three different but inter-related issues that have caused DHM technologies to be slowly adopted by ...
grasp envelopes because the space requirement for a specific task is an important aspect ... envelope to the engineers who design parts or work spaces.
Ride Motion Effects on the Accuracy of Rapid Pointing Tasks. Kevin A. Rider, Bernard J. Martin. Presented at the 1 st. American Conference of Human Vibration, Morgantown, West. Virginia, June, 2006. Reaching movements are planned and subsequently exe
have described movements performed in static environment (Wang, 1999; Faraway,. 2003; Lim et al, 2004). In contrast, this paper investigated the aspect of a ...
Heterogeneous catalysis possesses significant advantages in ... decades [7]. Many highly efficient systems have been developed for catalytic aerobic alcohol oxidation using .... interface using the JMP software (ver. 4.04) [20]. 3. ..... Custom desig
in response to necessary blast and ballistics requirements. Thus, most research and development has focused on experimental and computational evaluation and design of materials. Recently, however, the design focus has started to shift towards the com