摘要
回顾了近年来以线性系统为基础模型的频率响应函数估计方法的理论研究和发展现状。根据干扰误差主要成分的不同分为几个方面讨论,包括加性随机噪声、加窗泄漏引起的噪声、非线性系统失真引起的噪声等。综合论述了各种干扰误差下,各种频率响应函数估计方法的原理、特点及其在工程中的应用。最后对文章内容进行了总结并对频率响应函数估计领域的发展前景进行了探讨和展望。
The research progresses in measurement methods for frequency response function (FRF) based on the model of linear vibration system in recent years are reviewed. According to the different nature of the disturbance error factors, the discussions are devided into some corresponding aspects. Among then, some are the additive stochastic noises in measurement signals; others are the leakage errors due to window cut. In addition, the errors because of in the presence of nonlinear distortions in measurement signals are mentioned. The principles, characteristics and applications in engineering of many kinds of estimatation methods for frequency response function are discussed synthetically. The development prospect of measurement methods for frequency response function is summarized.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第5期48-52,共5页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(编号50605065)
重庆大学研究生科技创新基金
项目编号:200701Y1B01000196
关键词
频响函数估计
线性系统
误差
非线性失真
频谱泄漏
frequency response function (FRF) measurements
linear system
error
nonlinear distortion
spectral leakage
