Open AccessMethods for measuring the position of the centre of gravity of an anthropotechnic human-wheelchair system in dynamic conditions
Author(s) -
Bartosz Wieczorek,
Mateusz Kukla,
Łukasz Warguła
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/776/1/012062
Subject(s) - ellipse , wheelchair , position (finance) , center of gravity , geodesy , computer science , simulation , artificial intelligence , mathematics , geometry , geology , management , finance , world wide web , economics
The article presents the methods for measuring the position of the centre of gravity of an anthropotechnic human-wheelchair system in dynamic conditions. The methods were verified by the pilot studies using a pushrim-propelled wheelchair. Data processing methods were used to fit the ellipses to measured datasets including 4.463 to 3.434 points, where the ellipses are defined by their centres M C.G., inclinations α and semi-axes a and b. The method involves defining each ellipse fit to the dataset with a likelihood of inclusion of new position points of the centre of gravity. The ellipses characterized by the highest likelihood were selected, which for the tested cases was between 29.7 % to 40.9 %, depending on the test.