Recent Projects

HUMOSIM Ergonomics Framework The HUMOSIM ergonomics framework is a structure for planning and organizing human motion research and development. It includes modular motion simulation and analysis components designed for ease of implementation. Ergonomic analysis tools are integrated with the flexible posture and motion simulation models. Key points are body-segmented modularity (head and eye, upper extermity, torso, etc.), integration of modules to provide for whole-body motion coordination, and ease of implementation. More Information.

Modeling Forceful Exertion Postures A robust posture-prediction model would provide ergonomists with accurate task postures thereby increasing job assessment accuracy. A biomechanical approach has been shown to be useful. The objective of this study is to derive a model to predict postures adopted during standing high-force exertions based on worker characteristics and job strength requirements. More Information on the modeling.

Whole-Body Postures During Standing Hand Force Exertions A laboratory study was performed to document the effect of forceful hand exertions on posture. Various hand heights, exertion directions, and exertion levels were presented to subjects. Validation of postures was accomplished using video recordings of workers from automobile assembly plants. More Information on posture choices.

Predicting Foot Placements and Events for Digital HumansCurrent simulations and subsequent analysis tools do not accurately predict and represent non-cyclical stepping motions. A transition-stepping and timing model has been developed. More Information on the modeling.

Stepping and Balance During Manual Materials Handling Tasks Inaccurate representation of realistic stance and stepping behaviors limits the accuracy of the postures represented by human figure models and limits the validity of ergonomic analyses. The objective of this study is to document transition stepping strategies, predict realistic foot placements, and develop a statistical model to predict step scaling and timing. More Information on stepping behavior.

Estimation of Body Link Transfer Functions in a Vehicle Vibration Environment while Reaching Vehicle ride motions inhibit the ability of seated operators to perform in-vehicle reaching and pointing tasks while the vehicle is in motion. This study is investigating the effects of vibration (frequency and direction) and spatial variables (target locations) on reaching/aiming performance. The ultimate objective is to develop a biomechanical model to predict movements under vehicle vibration exposure. More Information.

Upper Body Coordination Phase Change The purpose of this project is to understand the mechanism of upper body coordination and motion control phase change. A biomechanical model to predict torso and upper extremity reach motions which involves various manual demands will be developed. More Information.

Synchronization of Upper Body Coordination Routine behavior associated with work tasks requires spatial and temporal coordination of complex body link movements. The purpose of this study is to investigate the general problem of coordination involving synchronization in time and space of multiple components across multiple concurrent actions. More Information.