基于改进粒子滤波算法的结构响应重构  

Structural Response Reconstruction Based on Improved Particle Filter Algorithm

作　　者：王宏强 彭珍瑞[1] WANG Hongqiang;PENG Zhenrui(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070

出　　处：《噪声与振动控制》2023年第6期31-37,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(62161018);甘肃省自然科学基金资助项目(20JR10RA234)。

摘　　要：针对有色噪声环境下的结构响应重构问题,提出一种基于改进粒子滤波算法的响应重构方法。首先在粒子群优化粒子滤波算法的基础上,引入权值的优化组合,以减缓粒子退化,从而提升粒子的多样性。然后将改进后的算法用于结构响应重构中,使用有限的加速度响应对未知的速度及加速度响应进行重构。最后分别对二维桁架和简支梁进行数值模拟和试验验证,结果表明与标准粒子滤波算法和粒子群优化粒子滤波算法的响应重构方法相比,所提改进算法在有色噪声环境下的响应重构精度更高。A method of structural response reconstruction in colored noise environment based on improved particle filter algorithm is proposed.Firstly,based on the particle filter algorithm of particle swarm optimization,an optimized combination of weights is introduced to slow down particle degradation and improve the diversity of particles.The improved algorithm is then used in structural response reconstruction.The finite acceleration responses are used to reconstruct unknown velocity and acceleration responses.Finally,the numerical simulation and experimental verification of a twodimensional truss and a simply supported beam are carried out respectively.The results show that compared with the response reconstruction methods of the standard particle filter algorithm and the particle swarm optimization particle filter algorithm,the response reconstruction accuracy of the proposed improved algorithm is higher in the colored noise environment.

关 键 词：振动与波 响应重构 粒子滤波算法 粒子群优化 权值组合 粒子多样性 

分 类 号：TH113.1[机械工程—机械设计及理论]