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On the implementation of opensim: applications of marker-based and inertial measurement unit based systems
Date
2019
Author
Biçer, Meti
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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The gait analysis system of METU Mechanical Engineering Department was established in the mid 1990s. The measurement technique is based on capturing the marker locations by means of video-cameras. The software packages employed are responsible for processing of video-camera images to obtain the 3-D positions of markers attached to specific locations of body and inverse kinematics and dynamics to reveal the joint angles, forces and moments during a gait. The first goal of the study is to analyze alternative methods of obtaining joint kinematic parameters from the marker locations by implementing different rotation angle sequences. The results indicate that, for a typical gait, different rotation sequences do not cause severe differences in the joint angles. Additionally, an open-source software, OpenSim, is utilized to process marker data, which provides a simulation environment for the existing system. Different skeletal models are created and critically analyzed with the aid of OpenSim. The last part of the study is devoted to the development of a new system using inertial measurement units. Each inertial measurement unit attached to body segments is responsible for extracting the orientation of the body in 3-D. The joint kinematic parameters and simulation are handled employing OpenSim, through subroutines written using its libraries.
Subject Keywords
Euler angles.
,
Gait Analysis
,
Euler Angles
,
OpenSim
,
Inertial Measurement Unit
URI
http://etd.lib.metu.edu.tr/upload/12623361/index.pdf
https://hdl.handle.net/11511/43806
Collections
Graduate School of Natural and Applied Sciences, Thesis