...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Industrial Electronics >Velocity Synchronous Linear Chirplet Transform
【24h】

Velocity Synchronous Linear Chirplet Transform

机译：速度同步线性Chirplet变换

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Linear transform has been widely used in time-frequency analysis of rotational machine vibration. However, the linear transform and its variants in current forms cannot be used to reliably analyze rotational machinery vibration signals under nonstationary conditions because of their smear effect and limited time variability in time-frequency resolution. As such, this paper proposes a new time-frequency method, named velocity synchronous linear chirplet transform (VSLCT). The proposed VSLCT is an extended version of the current linear transform. It can effectively alleviate the smear effect and can dynamically provide desirable time-frequency resolution in response to condition variations. The smearing problem is resolved by using linear chirplet bases with frequencies synchronous with shaft rotational velocity, and the time-frequency resolution is made responsive to signal condition changes using time-varying window lengths. To successfully implement the VSLCT, a kurtosis-guided approach is proposed to dynamically determine the two time-varying parameters, i.e., window length and normalized angle. Therefore, the VSLCT does not require the user to provide such parameters and hence avoids the subjectivity and bias of human judgment that is often time-consuming and knowledge-demanding. This method can also analyze normal mono-component frequency-modulated signal.
机译：线性变换已广泛应用于旋转机振动的时频分析。然而，由于它们在时频分辨率中的涂片效应和有限的时间可变性，因此不能使用当前形式的线性变换及其在当前形式的旋转机械振动信号下分析旋转机械振动信号。因此，本文提出了一种新的时频方法，命名速度同步线性Chirplet变换（VSLCT）。所提出的VSLCT是当前线性变换的扩展版本。它可以有效地减轻涂抹效果，并且可以响应于条件变化动态提供所需的时频分辨率。通过使用具有轴旋转速度同步的频率的线性Chirplet基座来解决涂抹问题，并且使用时变窗口长度响应于信号条件变化的时频分辨率。为了成功实现VSLCT，提出了一种久星引导方法，以动态地确定两个时变参数，即窗口长度和归一化角度。因此，VSLCT不需要用户提供这些参数，因此避免了人为判断的主观性和偏差，这通常是耗时和知识要求的。该方法还可以分析正常的单组分频率调制信号。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号