特徴マッチングに基づく電動大腿義足の障害物跨ぎ制御のための歩行位相予測
Feature Matching-Based Gait Phase Prediction for Obstacle Crossing Control of Powered Transfemoral Prosthesis
健側足首の慣性センサと遺伝的アルゴリズムで最適化したニューラルネットワークを用い、電動大腿義足の障害物跨ぎに必要な大腿・膝関節角度と歩行位相を高精度に予測する手法を提案した。
詳しい要約
1. どんなもの?
2. 先行研究と比べてどこがすごい?
3. 技術・手法の肝は?
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5. 議論はある?
6. 次に読むべき論文は?
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著者: Jiaxuan Zhang, Yuquan Leng, Yixuan Guo, Chenglong Fu
分類: cs.RO, cs.SY, eess.SY
原文アブストラクト
For amputees with powered transfemoral prosthetics, navigating obstacles or complex terrain remains challenging. This study addresses this issue by using an inertial sensor on the sound ankle to guide obstacle-crossing movements. A genetic algorithm computes the optimal neural network structure to predict the required angles of the thigh and knee joints. A gait progression prediction algorithm determines the actuation angle index for the prosthetic knee motor, ultimately defining the necessary thigh and knee angles and gait progression. Results show that when the standard deviation of Gaussian noise added to the thigh angle data is less than 1, the method can effectively eliminate noise interference, achieving 100\% accuracy in gait phase estimation under 150 Hz, with thigh angle prediction error being 8.71\% and knee angle prediction error being 6.78\%. These findings demonstrate the method's ability to accurately predict gait progression and joint angles, offering significant practical value for obstacle negotiation in powered transfemoral prosthetics.
