Least-squares matrix correlations between stump stresses and prosthesis loads for below-knee amputees.
Least-squares matrix correlations between stump stresses and prosthesis loads for below-knee amputees.
复制标题
膝下截肢者残肢应力与假肢负载之间的最小二乘矩阵相关性。
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
J. R. Pearson
中科院分区：
文献类型：
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作者：
D. J. Winarski;J. R. Pearson
两名单侧膝下截肢者在一系列屈伸角度调整中，残肢应力与假体载荷相关。髌腱和腓肠肌上的正应力与假体的轴向力和屈伸力矩通过矩阵方程相关联。该矩阵的元素，通过最小二乘算法计算的影响因子，确定了每个随时间变化的载荷分量的贡献，以产生随时间变化的正应力。通过一阶麦克劳林级数将这些矢状面载荷组合产生法向应力的方式的屈伸角度敏感性包含在矩阵方程中。高度有利的经验测量和理论预测残端应力之间的相关系数进行了计算。这表明，在未来的研究中，使用的影响因素矩阵持有承诺，量化的敏感性的残端的正常应力的修复体中的多个调整。
Stump stresses were correlated to prosthesis loads for two unilateral, below-knee amputees over a range of flexion-extension angular adjustments. Normal stresses on the patellar tendon and gastrocnemius were related to the axial force and flexion-extension moment of the prosthesis via a matrix equation. Elements of this matrix, influence factors calculated by least-squares algorithms, identified the contributions of each time-dependent load component acting to produce the time-dependent normal stresses. The flexion-extension angular sensitivity of the way these sagittal plane loads combined to produce normal stresses was included in the matrix equation via a first-order Maclaurin series. Highly favorable correlation coefficients between empirically measured and theoretically predicted stump stresses were calculated. This demonstrated that, in future studies, using an influence-factor matrix holds promise for quantifying sensitivities of normal stresses of the stump to multiple adjustments in prostheses.