一种基于信号检测理论的工况指标性能评估方法

Lun Zhang, N. Hu, Lei Hu, Zhe Cheng
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引用次数: 2

摘要

状态指示器是状态监测系统的重要组成部分。状态指标性能评价方法可以帮助用户选择有效的状态指标,提高状态监测系统的故障诊断性能。对测量影响因素的调查表明,ci服从正态分布。利用信号检测理论,提出了一种CI评估方法;采用可判别性指数评价系统区分故障和健康的能力。最后,用轴承和齿轮的实验信号对该方法进行了验证,结果表明该方法可以有效地评估CI性能,为CMS系统中CI的选择提供了依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A condition indicator performance assessment method based on signal detection theory
Condition indicators are significant elements in condition monitoring systems. A condition indicator (CI) performance assessment method would help users to select effective CIs and improve fault diagnosis performance of condition monitoring system (CMS). Investigating of measurement influence factors shows that CIs obey normal distribution. Taking advantage of signal detection theory, a CI assessment method is proposed; Discriminability Index is used to evaluate ability of CIs to distinguish fault from health. Finally, the method is validated with experimental signals of bearing and gear, the result show that this method is effective to assess CI performance, and it could help to select CIs in CMS system.
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