用于预测正常步态下地面反作用力和压力中心的新型刚性足地接触模型。

IF 2.4 3区 医学 Q3 BIOPHYSICS Journal of biomechanics Pub Date : 2024-11-01 DOI:10.1016/j.jbiomech.2024.112383
Xianzhi Gao , Lu Wang , Liang Jiang , Xue Chen , Zixin Wang , Sen Zhao , Qing Sun , Bo Huo
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引用次数: 0

摘要

地面反作用力(GRFs)和压力中心(COP)对于理解人体运动和评估生物力学参数至关重要,但在许多情况下,使用测力板测量地面反作用力和压力中心往往受到限制。在本研究中,我们提出了一种基于刚性足地接触模型(称为 COP 相变连续性模型 (COP-PTCM))的估算正常步态下 GRFs 和 COP 的新方法。在单支撑阶段(SSP),根据牛顿-欧拉方程计算 GRF 和 COP。考虑到正常步态时 COP 轨迹的时空连续性,双支撑阶段(DSP)的 COP 数据是通过使用 SSP 的 COP 数据拟合改进的对数函数获得的。DSP 期间的 GRF 采用最小能量假设进行优化。COP-PTCM 方法用于估算 10 名参与者正常步态时的 GRF 和 COP,并将结果与同时测量的力板数据进行比较,得出前后方向、垂直方向和内外侧方向的 GRF 测量值与估算值之间的相对均方根误差(rRMSE)分别为 10.90±2.09%、4.73±1.44% 和 15.17±1.69%。此外,前后方向的测量值和估计值之间的 rRMSE 为 11.23±0.03 %。上述比较验证了所提方法的有效性和准确性。
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A novel rigid Foot-Ground contact model for Predicting ground reaction forces and center of pressure during normal gait
Ground reaction forces (GRFs) and center of pressure (COP) are essential for understanding human motion and evaluating biomechanical parameters, but measuring them with force plates is often limited in many scenarios. In this study, we propose a novel methodology for estimating GRFs and COP during normal gait based on a rigid foot–ground contact model, referred to as the COP phase transition continuity model (COP-PTCM). The GRFs and COP are calculated based on the Newton-Euler Equations during the single support phase (SSP). Considering the spatiotemporal continuity of the COP trajectory during normal gait, the COP data for the double support phase (DSP) is obtained by an improved logistic function fitted using the COP data from the SSP. GRFs during the DSP are optimized using the minimum energy hypothesis. The COP-PTCM method is used to estimate the GRFs and COP of ten participants during normal gait, and the results are compared with simultaneously measured force plate data, yielding the relative root mean square error (rRMSE) between measured and estimated GRFs in the anterior-posterior, vertical, and medial–lateral directions are 10.90±2.09 %, 4.73±1.44 %, and 15.17±1.69 %, respectively. Additionally, the rRMSE between measured and estimated COP in the anterior-posterior direction is 11.23±0.03 %. The above comparison validates the effectiveness and accuracy of the proposed method.
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来源期刊
Journal of biomechanics
Journal of biomechanics 生物-工程:生物医学
CiteScore
5.10
自引率
4.20%
发文量
345
审稿时长
1 months
期刊介绍: The Journal of Biomechanics publishes reports of original and substantial findings using the principles of mechanics to explore biological problems. Analytical, as well as experimental papers may be submitted, and the journal accepts original articles, surveys and perspective articles (usually by Editorial invitation only), book reviews and letters to the Editor. The criteria for acceptance of manuscripts include excellence, novelty, significance, clarity, conciseness and interest to the readership. Papers published in the journal may cover a wide range of topics in biomechanics, including, but not limited to: -Fundamental Topics - Biomechanics of the musculoskeletal, cardiovascular, and respiratory systems, mechanics of hard and soft tissues, biofluid mechanics, mechanics of prostheses and implant-tissue interfaces, mechanics of cells. -Cardiovascular and Respiratory Biomechanics - Mechanics of blood-flow, air-flow, mechanics of the soft tissues, flow-tissue or flow-prosthesis interactions. -Cell Biomechanics - Biomechanic analyses of cells, membranes and sub-cellular structures; the relationship of the mechanical environment to cell and tissue response. -Dental Biomechanics - Design and analysis of dental tissues and prostheses, mechanics of chewing. -Functional Tissue Engineering - The role of biomechanical factors in engineered tissue replacements and regenerative medicine. -Injury Biomechanics - Mechanics of impact and trauma, dynamics of man-machine interaction. -Molecular Biomechanics - Mechanical analyses of biomolecules. -Orthopedic Biomechanics - Mechanics of fracture and fracture fixation, mechanics of implants and implant fixation, mechanics of bones and joints, wear of natural and artificial joints. -Rehabilitation Biomechanics - Analyses of gait, mechanics of prosthetics and orthotics. -Sports Biomechanics - Mechanical analyses of sports performance.
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