航空学报 > 1988, Vol. 9 Issue (8): 392-395

相关系数在参数识别中的应用

王超, 张景绘   

  1. 西安交通大学
  • 收稿日期:1987-01-26 修回日期:1900-01-01 出版日期:1988-08-25 发布日期:1988-08-25

APPLICATION OF CORRELATION COEFFICIENTS TO IDENTIFICAT/ON OF PARAMETERS

Wang Chao, Zhang Jinghui   

  1. Xian Jiaotong University
  • Received:1987-01-26 Revised:1900-01-01 Online:1988-08-25 Published:1988-08-25

摘要: 研究“在线”信号相关系数的应用,首先应解决利用“在线”信号相关系数迅速、准确地识别出模态参数。利用“在线”信号应满足以下要求:(1)不使用激振信息;(2)利用的振动信号要尽量短;(3)计算方法简单,满足实时处理要求;(4)抗干扰能力强。根据以上要求,利用振动信号的相关系数是合适的。但是,用这样少的信息识别振动系统的模态参数,其精发不如频率响应函数法高,但对于判断振动系统有无异常变化,其精度是足够的。

Abstract: A method identifying model parameters using correlation coefficients from on-line response signals of vibration system is proposed in this paper.This method is developed to be applicable for pratice. Some opinions about the use of the method for amplitude inspectation and supplemental explanation for reasons of abnormal changes of amplitude are given.