一个最小和多源的记录设置,用于脚关节动力学估计在行走时,仅使用下肢的近距离信息
概括
这项研究估计了只使用大腿肌肉信号和部运动的脚关节运动. 这种最小的设置为使用活性假肢的腿骨截肢者提供了舒适的解决方案.
科学领域:
- 生物力学 生物力学
- 生物医学工程 生物医学工程
- 康复技术 康复技术 康复技术
背景情况:
- 精确的脚关节动力学对于假肢控制和康复至关重要.
- 现有的方法通常需要广泛的传感器放置,影响用户的舒适性和实用性.
- 开发最小的传感器设置是改善假肢功能和用户体验的关键.
研究的目的:
- 提出和验证用于估计脚关节动力学的最小设置.
- 调查使用近端下肢信息 (大腿肌肉活动和部动力学) 来预测脚运动.
- 评估这种方法在骨截肢应用中的可行性.
主要方法:
- 表面电肌图 (sEMG) 记录了大腿肌肉活动 (大腿直肠,大腿两侧肌,大腿中枢肌).
- 在不受约束的行走过程中,同步测量了部和脚关节动力学.
- 时间域 (TD) 和波段 (WT) 特性来自sEMG数据养人工神经网络,随机森林和最小平方支持向量机 (LS-SVM) 模型.
- 模型性能使用根平均平方误差 (RMSE) 进行评估.
主要成果:
- 双腿肌与LS-SVM相结合,使用TD和WT特征实现了最佳的脚角估计 (RMSE <5.6度).
- 结合关节轨迹显著改善回归性能 (RMSE <4.5度).
- 证明了用有限的近端下肢数据估计脚运动的可行性.
结论:
- 使用近道下肢信息的最小设置可以可靠地估计脚关节动力学.
- 这种方法提高了腿骨移植截肢使用者的舒适性和实用性.
- 研究结果支持开发数据驱动模型,用于积极的假肢控制和康复解决方案.
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