中南大学学报（自然科学版）2013，Vol.44Issue(7)：3024-3032,9.
基于局部递归率分析的振动信号非平稳评价
Local recurrence rate analysis based non-stationarity measurement for operational vibration signal
摘要
Abstract
According to non-stationary assessment for operational vibration signals,a novel index was proposed based on the recurrence quantification analysis.The non-stationarity patterns in the recurrence plots were studied.To fill up the deficiency of recurrence trend,which was the commonly used non-stationarity measurement in the recurrence plot and was not suitable for assessing non-stationarity of structural operational vibration signals,the variation of local recurrence density was discussed,the minimal local recurrence density was used as a reference,and then a new non-stationarity measurement named recurrence loss value was proposed in which the quality loss function theory was introduced.Some typical non-stationary signals were used to validate it.Comparison of recurrence trend and recurrence loss value was made,and the result illustrates their differences and similarities.For reinforcing proposed measurement,the measurements were used for operational vibration signals.The results show that recurrence loss value has a good applicability for operational vibration signals.关键词
非平稳程度/递归图/递归量化分析/质量损失函数/环境振动信号Key words
degree of non-stationarity/ recurrence plot/ recurrence quantification analysis/ quality loss function/operational vibration signal分类
信息技术与安全科学引用本文复制引用
杨栋,任伟新,李丹,胡异丁..基于局部递归率分析的振动信号非平稳评价[J].中南大学学报（自然科学版）,2013,44(7):3024-3032,9.基金项目
国家自然科学基金资助项目(51078357) （51078357）
