National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Development of Models to Predict Optimal Lifting Motion. Final Performance Report.

PB97156681

Publication Date	1995
Personal Author	Ayoub, M. M.
Page Count	284
Abstract	The goal of the study was to continue efforts in the development of a reliable and realistic dynamic lifting simulation model. Specific objectives were to develop a simulation method to predict the sagittal plane lifting motion to validate the simulation method on both male and female subjects, and to perform sensitivity analysis to study the effect of input errors and changes in model parameters on the performance of the simulation method. As developed, the model simulated the dynamic motion of lifting tasks for five body joints: the elbow, shoulder, hip, knee, and ankle. The inputs of the model included initial and final joint postures: sex, weight, and height of the subject; weight load; lifting height; and box dimensions. The angular trajectories of the five joints were predicted on output. The motion of the lift was completely predicted by the model without any video inputs. The simulation model contained three computation units, the dynamics computation, the trajectory formulation and the optimization unit. Study results indicated that the simulation motion followed the actual motion closely.
Keywords	Occupational safety and health Manual lifting Materials handling Stress(Physiology) Models Simulations Humans Ergonomics Human factors engineering Musculoskeletal system disorders
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	Texas Tech Univ., Lubbock. Dept. of Industrial Engineering.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199714

Development of Models to Predict Optimal Lifting Motion. Final Performance Report.

Development of Models to Predict Optimal Lifting Motion. Final Performance Report.
PB97156681

Publication Date	1995
Personal Author	Ayoub, M. M.
Page Count	284
Abstract	The goal of the study was to continue efforts in the development of a reliable and realistic dynamic lifting simulation model. Specific objectives were to develop a simulation method to predict the sagittal plane lifting motion to validate the simulation method on both male and female subjects, and to perform sensitivity analysis to study the effect of input errors and changes in model parameters on the performance of the simulation method. As developed, the model simulated the dynamic motion of lifting tasks for five body joints: the elbow, shoulder, hip, knee, and ankle. The inputs of the model included initial and final joint postures: sex, weight, and height of the subject; weight load; lifting height; and box dimensions. The angular trajectories of the five joints were predicted on output. The motion of the lift was completely predicted by the model without any video inputs. The simulation model contained three computation units, the dynamics computation, the trajectory formulation and the optimization unit. Study results indicated that the simulation motion followed the actual motion closely.
Keywords	Occupational safety and health Manual lifting Materials handling Stress(Physiology) Models Simulations Humans Ergonomics Human factors engineering Musculoskeletal system disorders
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	Texas Tech Univ., Lubbock. Dept. of Industrial Engineering.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199714