等效非线性阻尼控制的准零刚度振动传感系统

摘要/Abstract

摘要： 为准确测量移动平台的绝对振动位移并进一步扩展测量频带，采用等效非线性阻尼控制方法设计了一种准零刚度（QZS）传感器。为使QZS传感器具有准零刚度特性，建立了传感器的动力学模型，并对其结构和静态特性进行分析；讨论了在不同预压缩量下传感器的幅频特性和相频特性，分析了不同等效非线性阻尼和激励对测量信号的精度影响。结果表明，等效非线性阻尼控制有效拓宽了准零刚度传感器系统的测量频带范围，该系统能够精确测量移动平台的绝对位移，满足工程实践要求。

关键词: 准零刚度, 绝对位移, 传感器, 等效阻尼

Abstract: In order to accurately measure the absolute vibration displacements of mobile platform，and further expand the measurement frequency bands，a quasi-zero-stiffness sensor was designed with the equivalent nonlinear damping control method.To realize the quasi-zero-stiffness characteristics of the QZS sensors，the dynamic model of the sensors was established，and their structure and static characteristics were analyzed.The amplitude-frequency and phase-frequency characteristics of the sensors under different pre-deformations were discussed，and then the effects of the sensors on the accuracy of measured signals under different equivalent nonlinear dampings and excitations were analyzed.The results show that the range of the measurement bands may be effectively widened by equivalent nonlinear damping control of the quasi-zero-stiffness sensor systems.The system may accurately measure the absolute displacements of mobile platform to meet the requirements of engineering practice.

Key words: quasi-zero-stiffness（QZS）, absolute displacement, sensor, equivalent damping

中图分类号:

TH113.2

杨攀1;邓兆祥2，3;舒红宇2，3;妥吉英3. 等效非线性阻尼控制的准零刚度振动传感系统[J]. 中国机械工程.

YANG Pan1;DENG Zhaoxiang2，3;SHU Hongyu2，3;TUO Jiying3. Quasi-zero-stiffness Vibration Sensor System of Equivalent Nonlinear Damping Control[J]. China Mechanical Engineering.

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