Validation Study for Novel Designed Tri-Axis Force Plate and Development of Algorithm for Decomposing Ground Reaction Fo
This developed an algorithm to solve the footstep targeting problem by gait analysis of the novel force plate. Using the force plate and the novel force plate to measure 11 healthy participants, and each subject was required to perform three times of coun
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Abstract
This developed an algorithm to solve the footstep targeting problem by gait analysis of the novel force plate. Using the force plate and the novel force plate to measure 11 healthy participants, and each subject was required to perform three times of counter movement jumps (CMJ), and walks without footstep targeting on two force platforms. First of all, the data of Ground Reaction Force (GRF) from Counter Movement Jump (CMJ) performance would be collected, and be calculated the parameter, including body weight, flight time, and the peak value of the vertical component to validate the novel tri-axis force plate. Second, in the algorithm development, vertical GRF measure and vertical GRF computed during normal gait analysis from the motion force plate were compared with each other, and the algorithm was used to calculate the decompose force when stepping on the novel force plate. Finally, the decomposed force with the corresponding measure with motion would be verified. It was analyzed by Spearman rank correlation coefficient, and the results were: body weight (R = 0.99, p < 0.01), flight time(R = 0.92, p < 0.01), and peak value of the vertical ground reaction force (R = 0.91, p < 0.01). Additionally, the mean relative error between the vertical GRF and the corresponding was 6.77 ± 7.49%. Therefore, the decomposed vertical GRF of both force plate and novel force plate were compared and that disclosed the algorithm of decomposed the vertical GRF. At compared the cross correlation coefficients with decomposed GRF on novel force plate by algorithm and measured on motion lab, the result showed that the right footstep variations of cross correlation coefficients was 0.98 and left footstep was 0.99, so In this study, the novel force plate indeed has high validity representation by the experiments examine, and the algorithm to decompose the vertical ground reaction forces was validated when subjects stepping on the single novel force plate. It try to solve the “Targetting Step”. Keywords
Novel force plate Decompose
Gait analysis
W.Y. Su L.Y. Guo (&) Department of Sport Medicine, College of Medicine, Kaohsiung Medicine University, 100 Shih-Chuan 1st Road, Kaohsiung, Taiwan e-mail: [email protected] C.W. Yen Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan L.I. Wu Department of Post Baccalaureate Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Ground reaction force
Counter movement jumps
Introduction and Purpose
The ground reaction force (GRF) which is measured by force plate is often used to assess the kinetic parameters of gait pattern [1–7]. In order to accurately measure the GRF of both right and left feet for gait analysis, most of the laboratories will require subjects to step on both left and right sides of the load board (targeting step).
© Springer Nature Singapore Pte Ltd. 2018 T. Vo Van et al. (eds.), 6th International Conference on the Development of Biomedical Engineering in Vietnam (BME6), IFMBE Proceedings 63,
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