Iranian Journal of Biomedical Engineering (IJBME)
نشریه علمی مهندسی پزشکی زیستی

Experimental and Theoretical Investigation of Human Stability under Tilting Base Plate in the Sagittal Plane

Document Type : Full Research Paper

Authors

Davoud Naderi 1
Mohsen Sadeghi Mehr 2
Nader Farahpour 3
Behnam Miripour-Fard 4

1 Assistant Professor, Mechanical Engineering Department, Engineering School, Bu-Ali Sina University

2 Assistant Professor, Mechanical Engineering Department, Engineering School, Bu-Ali Sina University ,

3 Associate Professor, Physical Education and Sport Science Department, Literature and Humanities School, Bu-Ali Sina University ,

4 M.Sc Student of Mechanical Engineering, Engineering School, Bu-Ali Sina University

10.22041/ijbme.2008.13434
Abstract
Cognition of human postural responses can provide valuable insight on the control of stability. Researchers can use this finding to design rehabilitation exercises to improve the patients, balance. This study was done with the aim of conducting theoretical and experimental investigations on human response to tilting base plate in the sagittal plane. A four-segment model with three degrees of freedom was used as a biomechanical model of human body and its motion was studied in the sagittal plane. The postures of model were found by optimization technique such that the stability of model to be optimum. Zero moment point stability criterion was applied to find the optimum posture against the tilting base plate. To verify the theoretical results experimentally, the stability measure device was designed and manufactured. In several trials, the responses of ten male healthy persons standing on a tilting platform under perturbations were recorded by using the motion analysis system. Through data analysis, the response of each subject was surveyed and the experimental and theoretical results were compared. Both the experimental and theoretical results showed that the human central nervous system evokes the ankle strategy to keep its balance under tilting base plate conditions. A good coincident between the experimental results and theoretical predictions was observed, indicating that the model basis optimization method can be well relied upon to predict the human joints angle trajectories in response to base plate tilting. 

Keywords

Human stability
Tilting platform
Sagittal plane
dynamic modeling
Optimization
Motion analysis system

Subjects

  • Receive Date 26 June 2015

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