Influence of Object Properties on Reaching and Grasping Tasks Sungchan Bae, Jaewon Choi, and Thomas J. Armstrong Presented at the 2008 SAE Digital Human Modeling Conference, Pittsburgh, Pennsylvania, June 17-19, 2008. SAE Technical Paper 2008-01-1905. This paper investigates how reaching and grasping are affected by various properties of the object and conditions under which objects are placed in. Many studies have examined the effect of object attributes such as sizes, shapes, and distances to the subject. However, little research has observed the motion of both fingers and wrist to look at the effect of various object properties. Also, little attention was given to quantitative analysis on temporal aspects of wrist movement and shape of the hand. Six subjects (3 males and 3 females) with a wide demographic range of hand anthropometry participated in the experiment. A cylinder of different sizes (diameters of 1.3, 3.8, 10.2 cm) was placed in front of the subjects at elbow height; the object was also positioned at different distances (20, 30, 40cm) along two orientations, vertical and axial directions. To quantify the movement, 3D-coordinates of the finger joints and the wrist of one hand were recorded during reaching and grasping actions. Analysis of grasping posture found that finger joint angles depended upon both object size and orientation while wrist postures were distinct depending on object orientation. Also, each object orientation caused different relative positions and directions with respect to the hand at grasping. Hence, the results suggests that people modify their wrist for a given object orientation, leading to different position of the object at grasping. Subsequently, finger joint angles are formed on the object based on object size or the subject’s hand anthropometry. In addition, temporal variables will be explored to explain time profiles of the finger and wrist motion during reaching and grasping. This research is a good contribution to understanding hand shaping with consideration of various conditions, developing a kinematic model to predict the hand posture, and rehabilitation by providing comparative standard of hand movements. abs2008_02
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 ...
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-
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
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.
The mechanism of muscular effort perception in the shoulder was examined in this experiment. Two shoulder biomechanical models and experimental muscle ...
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
