Improved Functional Approach on Hip Joint Center Estimation

Abstract:

Finding the hip joint center (HJC) is crucial in human gait analysis since it affects kinematics and kinetics calculation of human lower limbs. Currently, the HJC location is found by either functional or prediction approaches. Prediction approaches simply use the pelvic geometric parameters to predict the HJC location. Functional approaches have been verified that they are more accurate than prediction methods with sufficient range of motion (ROM) data. However, for patients with locomotion problems to conduct full-ROM data, this paper proposes a method to fuse the functional and prediction approaches to have an intermediate result with less ROM data. The proposed method simulates large ROM data for the functional method to obtain an accurate HJC. We tested and verified the proposed method on three male subjects at the age of 25 with different body-mass indices. The experiment showed that the worst result of the proposed method was at least the same as that predicted by the prediction approach. While larger ROM data was applied, our result was significantly improved.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 1547-1551
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.1547
• Online since: January 2013
• Authors: Hsien I Lin, Chi Li Chen, Yi Pin Chiang
• Keywords: Functional Approach, Gait Analysis, Hip Joint Center Estimation, Less Range of Motion, Prediction Approach

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