仪用空气弹簧隔振台固有频率的研究

发布时间：2018-02-07 15:34

本文关键词： 空气弹簧隔振系统固有频率膜式空气弹簧数学模型刚度特性　出处：《液压与气动》2016年02期 　论文类型：期刊论文

【摘要】：超精密测量对环境振动要求非常严格,其仪器设备中多安装隔振装置。针对课题组圆度仪中使用的仪用小型空气弹簧隔振台,采用理论方法研究其固有频率。首先简化隔振台振动模型,根据该隔振台中约束式膜式空气弹簧的特定结构及相关理论,建立单个空气弹簧数学计算模型,获得单个空气弹簧刚度特性与其垂向变形量x的关系式,最终求得隔振系统的固有频率;同时利用压电式加速度传感器设计振动测试试验,对采集到的加速度信号进行预处理、积分运算、频谱分析,获得该系统的固有频率,两者对比,误差不超过10%,达到预期研究目标。为理论上研究该隔振平台的隔振性能及其耦合振动情况提供理论基础,也对其他类似结构的空气弹簧刚度特性的计算有一定参考意义。
[Abstract]:Ultra-precision measurement requires very strict environmental vibration. Vibration isolators are often installed in the instruments and equipment. The natural frequency is studied by theoretical method. Firstly, the vibration model of the vibration isolator is simplified. According to the specific structure and related theory of the membrane air spring, the mathematical calculation model of the single air spring is established. The relationship between the stiffness characteristics of a single air spring and its vertical deformation x is obtained, and the natural frequency of the vibration isolation system is finally obtained. At the same time, the vibration test test is designed by using a piezoelectric accelerometer to preprocess the collected acceleration signals. The integral operation, spectrum analysis, and the natural frequency of the system are obtained. The error between the two is not more than 100.This provides a theoretical basis for the theoretical study of the vibration isolation performance and coupling vibration of the platform. It also has some reference significance for the calculation of the stiffness characteristics of air spring of other similar structures.
【作者单位】：中国计量学院计量测试工程学院;
【基金】：国家自然科学基金(51075378)
【分类号】：TB535

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