YANG Shangru， ZHANG Xiaolong， DONG Yabin， HE Yumin
（School of Mechanical and Electrical Engineering， Xi’an University of Architecture and Technology， Xi’an 710055, China）
Abstract： In order to reduce the impact of human arm tremor on patients, a ball-type dynamic vibration absorber is designed to reduce the amplitude of the tremor in the arm of the tremor patient. First, according to the relevant theories of biomechanics and vibration mechanics, the tremor of the human arm can be approximated as a spring-mass motion, and a vibration model of arm tremor is established. Secondly, the designed ball-type dynamic vibration absorber is installed on the arm of the tremor patient by using the principle of vibration control, and the mechanical vibration system of the arm tremor is established after the vibration absorber is installed. The dynamic equation of the system is deduced by using Lagrangian equation, and the basic principle of the vibration absorber for restraining arm tremor and the influence of the mass of the absorber on the restraining effect are analyzed theoretically. Finally, the arm movement displacement signals of tremor patients with or without shock absorber are tested by laser displacement sensor. The experimental results show that the designed ball-type dynamic vibration absorber can effectively suppress the tremor movement of the human arm, and its maximum tremor suppression efficiency can reach 57%. It can provide a new design scheme for the research of passive vibration suppression device.
Key words： tremor; human arm; vibration control; dynamic vibration absorber； ball
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利用滚珠式动力吸振器抑制人体手臂震颤的研究
杨尚儒， 张小龙， 东亚斌， 何育民
（西安建筑科技大学 机电工程学院， 陕西 西安 710055）
摘要：为有效减轻人体手臂震颤对患者的影响， 设计了一款可用于抑制人体手臂震颤的滚珠式动力吸振器， 可以降低震颤患者手臂震颤过程中的位移幅度。 首先， 根据生物力学和振动力学等相关理论， 将人体手臂的震颤近似为一种弹簧-质量运动， 并建立了手臂震颤的振动模型。 其次， 利用振动控制的原理， 将设计的滚珠式动力吸振器安装在震颤患者手臂上， 同时建立安装吸振器后手臂震颤的机械振动系统， 使用拉格朗日方程推导出该系统的动力学方程， 理论分析了该吸振器抑制手臂震颤的基本原理和吸振器质量对抑制效果的影响。 最后， 使用激光位移传感器对有无安装吸振器时震颤患者手臂运动的位移信号进行实际测试。 实验结果表明， 所设计的滚珠式动力吸振器能够有效抑制人体手臂的震颤运动， 其震颤抑制效率最高可达57%， 能够为被动式震颤抑制装置的研究提供一种新的设计方案。
关键词：震颤； 人体手臂； 振动控制； 动力吸振器； 滚珠
引用格式：YANG Shangru， ZHANG Xiaolong， DONG Yabin， et al． Research on restraint of human arm tremor by ball-type dynamic vibration absorber． Journal of Measurement Science and Instrumentation， 2023， 14（4）： 425-430. DOI： 10．3969／j．issn．1674-8042．2023．04．005
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