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首页> 外文期刊>Journal of Biomechanics >A comparison between a new model and current models for estimating trunk segment inertial parameters.
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A comparison between a new model and current models for estimating trunk segment inertial parameters.

机译：新模型与当前模型之间的比较，以估算躯干段惯性参数。

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Modeling of the body segments to estimate segment inertial parameters is required in the kinetic analysis of human motion. A new geometric model for the trunk has been developed that uses various cross-sectional shapes to estimate segment volume and adopts a non-uniform density function that is gender-specific. The goal of this study was to test the accuracy of the new model for estimating the trunk's inertial parameters by comparing it to the more current models used in biomechanical research. Trunk inertial parameters estimated from dual X-ray absorptiometry (DXA) were used as the standard. Twenty-five female and 24 male college-aged participants were recruited for the study. Comparisons of the new model to the accepted models were accomplished by determining the error between the models' trunk inertial estimates and that from DXA. Results showed that the new model was more accurate across all inertial estimates than the other models. The new model had errors within 6.0% for both genders, whereas theother models had higher average errors ranging from 10% to over 50% and were much more inconsistent between the genders. In addition, there was little consistency in the level of accuracy for the other models when estimating the different inertial parameters. These results suggest that the new model provides more accurate and consistent trunk inertial estimates than the other models for both female and male college-aged individuals. However, similar studies need to be performed using other populations, such as elderly or individuals from a distinct morphology (e.g. obese). In addition, the effect of using different models on the outcome of kinetic parameters, such as joint moments and forces needs to be assessed.
机译：在人体运动的动力学分析中，需要对人体节段进行建模以估计节段的惯性参数。已经开发出一种新的行李箱几何模型，该模型使用各种横截面形状来估算分段体积，并采用针对性别的非均匀密度函数。这项研究的目的是通过将新模型与躯干惯性参数进行比较，并与生物力学研究中使用的最新模型进行比较，以测试新模型的准确性。以双X射线吸收法（DXA）估算的躯干惯性参数为标准。该研究招募了25名女性和24名男性的大学年龄参与者。通过确定模型的主干惯性估计与DXA的惯性估计之间的误差，可以完成新模型与公认模型的比较。结果表明，新模型在所有惯性估计中的准确性都高于其他模型。新模型的两个性别的误差均在6.0％以内，而其他模型的平均误差则更高，从10％到50％以上，并且性别之间的不一致程度更高。另外，当估计不同的惯性参数时，其他模型的精度水平几乎没有一致性。这些结果表明，与其他模型相比，该新模型对男性和女性大学年龄个体均提供了更准确和一致的躯干惯性估计。但是，需要使用其他人群（例如老年人或来自不同形态（例如肥胖）的个体）进行类似的研究。此外，还需要评估使用不同模型对动力学参数（例如关节力矩和力）结果的影响。

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