抗密频线谱干扰的实时次级通路辨识方法研究  

Research of the real⁃time secondary path identification method against dense frequency interference

作　　者：李彦[1,2] 尹天齐 张能 黄晋[1,2] LI Yan;YIN Tianqi;ZHANG Neng;HUANG Jin(Institute of Noise&Vibration,Naval University of Engineering,Wuhan 430033,China;National Key Laboratory on Ship Vibration&Noise,Wuhan 430033,China)

机构地区：[1]海军工程大学振动与噪声研究所,武汉430033 [2]船舶振动噪声重点实验室,武汉430033

出　　处：《振动与冲击》2025年第4期151-164,共14页Journal of Vibration and Shock

摘　　要：次级通路模型的辨识误差对自适应有源控制算法的稳定性具有显著影响,因此需要准确的次级通路模型。然而,由于难以去除密频干扰的影响,次级通路辨识通常在初级振源关闭、背景噪声较低的情况下进行。但实际工程中,次级通路传递特性是时变的,模型与实际工作状态存在较大差异,导致自适应控制效果不佳、甚至失稳。为解决这一难题,首先提出了一种基于二阶时频滤波方法的低运算量、高精度辨识次级通路频响函数实部和虚部的方法。然后,分析了有密频干扰情况下实时辨识实部和虚部参数的波动特性规律。最后,提出了抗密频干扰的实时次级通路辨识方法,去除密频干扰引起的辨识参数波动,并获得了稳定、高精度的实时次级通路辨识结果。通过该研究,提供了一种抗密频干扰的实时次级通路辨识方法,可以有效提高隔振装置的自适应控制性能。该研究具有高精度、低运算量等优点,因此在实际工程的时变环境中能快速提供可信的辨识结果,具有较高的实用价值和推广前景。The error of the secondary path model has a significant impact on the stability and convergence of the adaptive control algorithm,so an accurate secondary path model is required.However,because it is difficult to remove the influence of dense frequency interference,the identification process is usually carried out while the primary vibration source is turned off and the background noise is low.However,in actual engineering,the vibration transfer characteristics of the secondary path are time⁃varying,and there is a large difference between the model and the actual working state secondary path,resulting in poor adaptive control effect or even divergence.In order to solve this problem,firstly,a method based on the second⁃order time⁃frequency filtering method was proposedin this paperto identify the real part and imaginary part of the frequency response function of the secondary path with low computational complexity and high precision.Then,the fluctuation characteristics of real⁃time identification of real and imaginary parameters in the presence of dense frequency interference were analyzed.Finally,a real⁃time secondary path identification method against dense frequency interference was proposed,which removedthe fluctuation of identification parameters caused by dense frequency interference,and obtainedstable and high⁃precision real⁃time secondary path identification results.Through the research,a real⁃time secondary path identification method against dense frequency interference was proposed,which can effectively improve the adaptive control performance of the vibration isolation device.This method not only has the advantages of high precision and smallcalculation amount,but also can adapt to the time⁃varying environment in actual engineering,and has high practical value and promotion prospect.

关 键 词：主被动隔振 自适应控制算法 次级通路实时辨识 相位误差 密频干扰 

分 类 号：TB123[理学—工程力学]