基于奇异值分解的惯性测量组合减振系统非线性刚度识别  

Identification of Nonlinear Stiffness of Inertial Measurement Unit with Vibration Absorber System Based on Singular Value Decomposition

作　　者：张鹏飞[1] 苏华昌[1] 吴家驹[1] 

机构地区：[1]北京强度环境研究所,北京100076

出　　处：《导弹与航天运载技术》2016年第3期68-72,共5页Missiles and Space Vehicles

摘　　要：介绍了基于奇异值分解的复解析小波脊线提取方法,并用仿真算例进行了验证。设计了基于冲击响应的非线性刚度识别程序。采用半正弦冲击对惯组减振系统的非线性特性进行试验研究,验证了方法的可行性,分析了非线性系统刚度和阻尼的变化规律。对于非线性特征比较明显的结构,使用该方法的参数识别结果具有较高精度。Wavelet ridge extracting method based on singular value decomposition（SVD） was introduced. A numerical example was actualized to validate the method. Programs of identifying nonlinear stiffness based on impulse response were designed. The experiment of inertial measurement unit with rubber vibration absorber under the load of half sine pulse was conducted to validate the feasibility of the method. The changing regularities of nonlinear stiffness and damp were analysed. Using this method, the parameter identified results are high precise to nonlinear system.

关 键 词：非线性刚度 小波变换 奇异值分解 小波脊线 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程]