论文部分内容阅读
为弥补环境引起的超磁致伸缩材料的不可控变形,将超磁致伸缩致动器置于弹性阻尼基座上,计算此时输出端和底座的稳态响应.将系统简化为两自由度线性系统,建立了系统的振动微分方程,计算其固有角频率,并通过简谐激励输入分析了系统的幅频特性.输入不同幅值和频率的简谐电流,通过实验得到输出端和底座的位移;根据实验结果计算了模型的相对误差,并对比模型和实验的绝对误差.计算结果表明:模型与实验结果的相对误差不超过9%,绝对误差不超过0.01mm,由此验证了模型的准确性.
In order to compensate for the uncontrollable deformation of the giant magnetostrictive material caused by the environment, the giant magnetostrictive actuator is placed on the elastic damping base to calculate the steady-state response of the output end and the base at this moment. The system is simplified into two degrees of freedom Linear system, the system vibration differential equation is established and its natural angular frequency is calculated, and the amplitude-frequency characteristic of the system is analyzed through the input of harmonic excitation. The harmonic current with different amplitude and frequency is input, and the output and base The relative error of the model is calculated and the absolute error between the model and the experiment is contrasted.The calculation results show that the relative error between the model and the experimental result is less than 9% and the absolute error is less than 0.01mm, which verifies that the model’s accuracy.