【摘要】 提出采用负刚度吸振器控制人体手臂静止性震颤的方法，以便有效减小传递到前臂的动态响应.首先，建立含负刚度吸振器的人体手臂耦合动力学模型；然后，推导得到各关节位置的幅频响应表达式，并采用序列二次规划算法给出负刚度吸振器的最优设计参数.利用最优设计参数分别计算得到正弦激励和随机激励对应耦合系统的动态响应曲线.为了便于对比，给出未安装负刚度吸振器和安装传统线性吸振器时人体手臂各关节的动态响应.计算结果表明，负刚度吸振器对人体手臂静止性震颤引起各关节的动态响应抑制效果显著优于传统线性吸振器.更多还原

【Abstract】 In this paper, a dynamic vibration absorber with negative stiffness(DVA-NS) is proposed to control the rest tremor of human arm in order to effectively reduce the dynamic response transmitted to the forearm. Firstly, the coupling dynamic model of human arm with DVA-NS is established. Then, the amplitude-frequency response expressions of each joint positions are derived, and the optimal design parameters of the DVA-NS are determined by using the sequential quadratic programming algorithm. On this basis, the above optimal design parameters are used to calculate the dynamic response curves under sinusoidal and random excitations, respectively. For ease of comparison, the dynamic responses of the coupling dynamic systems without the DVA-NS and with traditional linear dynamic vibration absorber(LDVA) are also presented, respectively. The calculation results show that the suppression effect on dynamic responses of different joints induced by the rest tremor of human arm by using the DVA-NS is significantly better than that of traditional LDVA.更多还原