Shah Manthan, Goode Dylan, Mohammadi Hadi
The Heart Valve Performance Laboratory, School of Engineering, Faculty of Applied Science, University of British Columbia, Kelowna, Canada.
J Med Eng Technol. 2023 Apr;47(3):157-164. doi: 10.1080/03091902.2022.2134482. Epub 2022 Oct 25.
Tremors are a prevalent movement disorder due to a nervous system condition that leads to involuntary muscle movements observed in patients. This paper converts the tremorous anatomical human arm model to a single degree of freedom (SDOF) forced vibration problem. The mathematical modelling with Euler-Lagrange's equation is performed for the SDOF human arm model with two different potential vibration absorbers. A computational study is conducted on MATLAB Simulink by MathWorks Inc. (Natick, MA) to compare two absorbers, and the results are verified on the multibody dynamics simulation solution software, MSC Adams by Hexagon AB. It is concluded that the T beam-shaped vibration absorber represented a higher amplitude reduction, up to 80%, compared to the inertial mass absorber, which had an amplitude reduction of 65% over the range of frequencies. Experiments conducted with the T beam absorber prototype also support the computational findings. Future research focuses on designing an ergonomic wearable device with a proposed T-beam absorber that can passively attenuate the tremor at various frequencies.
震颤是一种常见的运动障碍，由神经系统疾病引起，导致患者出现不自主的肌肉运动。本文将震颤的人体手臂解剖模型转化为单自由度（SDOF）强迫振动问题。使用欧拉-拉格朗日方程对具有两种不同潜在振动吸收器的单自由度人体手臂模型进行数学建模。由MathWorks公司（马萨诸塞州纳蒂克）在MATLAB Simulink上进行了一项计算研究，以比较两种吸收器，并在多体动力学仿真解决方案软件Hexagon AB的MSC Adams上对结果进行了验证。得出的结论是，与惯性质量吸收器相比，T形梁振动吸收器的振幅降低幅度更高，高达80%，而惯性质量吸收器在频率范围内的振幅降低了65%。使用T形梁吸收器原型进行的实验也支持了计算结果。未来的研究重点是设计一种符合人体工程学的可穿戴设备，该设备带有提议的T形梁吸收器，能够在不同频率下被动衰减震颤。
