Development of a 7-DOF Biodynamic Model for a Seated Human and a Hybrid Optimization Method for Estimating Human-Seat Interaction Parameters

IF 2.5 4区 综合性期刊 Q2 CHEMISTRY, MULTIDISCIPLINARY
Abeeb Opeyemi Alabi, Byoung-Gyu Song, Jong-Jin Bae, Namcheol Kang
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引用次数: 0

Abstract

Existing biodynamic models adopt apparent mass and seat-to-head transmissibility to predict the response of seated humans to whole-body vibration, limiting their ability to capture the actual response of distinct body segments in different excitation conditions. This study systematically develops a 7-DOF seated human model, a vibration experiment, and a novel hybrid optimization to estimate unknown mechanical parameters and predict the response of different human body segments to vertical vibrations. Experimental results showed that the upper trunk and head were most susceptible to transmitted vibrations. Combining the 7-DOF model and HOM resulted in accelerated optimization, improved numerical stability, and significant minimization of the objective function value compared to conventional algorithms. Notably, the estimated parameters, particularly stiffness, remained consistent regardless of increasing excitation magnitude or change in the body segment data used. Additionally, the model captured the non-linearity in human biodynamics through stiffness softening. These findings are applicable in seating systems optimization for comfort and safety.
坐着人的7自由度生物动力学模型的开发和估计人-座相互作用参数的混合优化方法
现有的生物动力学模型采用表观质量和座椅-头部传递性来预测坐着的人对全身振动的反应,限制了他们在不同激励条件下捕捉不同身体段实际反应的能力。本研究系统地开发了一个7自由度的坐姿人体模型、一个振动实验和一种新的混合优化方法,以估计未知的机械参数并预测不同人体段对垂直振动的响应。实验结果表明,上躯干和头部最容易受到传递振动的影响。与传统算法相比,将7自由度模型和HOM相结合可以加速优化,提高数值稳定性,并显著最小化目标函数值。值得注意的是,无论所用身体节段数据的激励幅度增加或变化如何,估计的参数,特别是刚度,都保持一致。此外,该模型通过刚度软化捕捉到了人类生物动力学中的非线性。这些发现适用于座椅系统的舒适性和安全性优化。
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来源期刊
Applied Sciences-Basel
Applied Sciences-Basel CHEMISTRY, MULTIDISCIPLINARYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.30
自引率
11.10%
发文量
10882
期刊介绍: Applied Sciences (ISSN 2076-3417) provides an advanced forum on all aspects of applied natural sciences. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.
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