噪声与振动控制2019，Vol.39Issue(3)：83-87,5.DOI:10.3969/j.issn.1006-1355.2019.03.016
准确求解固有频率提高分段积分阻尼识别精度及其应用
Improvement of the Accuracy of Damping Identification by using Piecewise Integral based on Accurately Solving the Natural Frequency
摘要
Abstract
Piecewise integration is a recently proposed method for damping identification. The key of this method is to accurately identify the natural frequency of the signal. In this paper, a method of solving the natural frequency is proposed. Firstly, the natural frequency of the signal is estimated using Fourier transform. The equations of natural frequency error are constructed through twice integral operations. Then, the equations are solved and the exact natural frequency of the signal is obtained. Then, the natural frequency is used to identify the damping by piecewise integral method. The example shows that this method can solve the natural frequency accurately and quickly, raise the accuracy of damping identification by controlling the whole period integral, and is beneficial to the accurate calculation of the amplitude and phase of the signal. As a result, the whole damping signal can be identified and extracted more accurately. Finally, the proposed method is applied to damping identification for the gear housing cover of an engine.关键词
振动与波/信号识别/固有频率/阻尼比/齿轮室盖Key words
vibration and wave/ signal recognition/ natural frequency/ damping ratio/ gear housing cover分类
数理科学引用本文复制引用
时海涛,程惠,赵晓丹..准确求解固有频率提高分段积分阻尼识别精度及其应用[J].噪声与振动控制,2019,39(3):83-87,5.基金项目
国家重点研发计划资助项目(2016YFB1200503-02/2016YFB1200506-08) （2016YFB1200503-02/2016YFB1200506-08）
战略性国际科技创新合作重点专项资助(2016YFE0205200) （2016YFE0205200）
国家自然科学基金资助项目(U1434201/51475390) （U1434201/51475390）
