惯性导航平台减振装置设计及其动态特性分析  

Dynamic Characteristic Analysis and Design of Vibration Isolation System for Inertial Navigation Platform

作　　者：曾文[1] 黄茂林[2] 王玉兴[1] 卿艳梅[1] 张殿武[1] 

机构地区：[1]华南农业大学工程学院,广州510642 [2]重庆大学机械工程学院,重庆400044

出　　处：《机械科学与技术》2013年第8期1113-1117,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51005080);科技部国家星火计划引导项目(2011GA780027)资助

摘　　要：针对惯性导航平台隔离振动的要求,在分析惯性导航平台振源基础上,结合减振理论,设计了该平台的减振系统。基于复刚度模型的橡胶减振系统理论,实验测试得到橡胶减振器多种工况下的参数-刚度、损耗因子。建立了减振系统的有限元模型,通过模态分析获得减振系统的前12阶固有频率,并通过谐响应分析方法分别获得发动机怠速激励和陀螺仪抖动激励下的位移响应,结果表明所设计的减振系统固有频率远离发动机怠速激励和陀螺仪抖动激励频率、位移响应幅值小,具有良好的减振效果。A vibration isolation system was designed to isolate vibration for inertial navigation platform based on the vibration sources and theory of vibration isolation. The parameters of a rubber isolator such as stiffness and damping coefficient were obtained through experiment according to the theory of complex stiffness. The finite element model of the vibration isolation system was established with the help of ANSYS software. The first 12 order natural fre- quencies and the displacement response in case of excitation by engine idle speed and gyro dithering were obtained by modal analysis and harmonic response analysis, respectively. The calculated results indicate that natural fre- quencies of the designed system are far away from the frequency of engine idle speed and gyro dithering, and the displacement response amplitude is low. It is an effective vibration isolation system.

关 键 词：惯导平台 减振 动态特性 模态分析 谐响应分析 

分 类 号：TH113.1[机械工程—机械设计及理论]