Biomedical subjects

W H Levison

Publications and source records attributed to W H Levison.

2 recordsLinked to original sources

PubMed1978

Model for human controller performance in vibration environments.

A model has been developed to predict biomechanical response and human controller performance as a function of vibration environment and tracking-task parameters. The model consists of three major elements: 1) a biodynamic model to predict limb and body motion resulting from platform vibration, 2) a pilot/vehicle model to predict tracking performance, and 3) an interface model to relate changes in certain pilot-related model parameters to biodynamic response. Linearity of biodynamic response mechanisms is demonstrated, and the model is shown to predict accurately the effects of tracking performance of vibration amplitude and spectrum, control gain, R.M.S. tracking input, and direction of vibration input.

Aviation↗

PubMed1978

Recent advances in modelling the effects of roll motion on the human operator.

An experiment is presented in which the effects of roll motions on human operator performance were investigated. The motion cues considered were the result of commanded vehicle motion and vehicle disturbances. An optimal control pilot-vehicle model was used in the design of the experiment and to predict system performance prior to executing the experiment. The model predictions and experimental results are compared. Of the model predictions, 78% are within 1 S.D. of the means of the experimental results. The high correlation between model predictions and system performance indicate the usefulness of the predictive model for experimental design and for prediction of pilot performance influenced by motion cues.

Adolescent↗