在时间变化的旋转速度下,通过改进的S高阶同步提取变换来诊断滚动轴承的故障
1School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
ISA transactions
|January 18, 2026
概括
本研究介绍了一种改进的S高阶同步提取变换器 (ISHSET),用于在旋转机器中无触角的顺序跟踪. ISHSET增强了旋转频率估计,以改善不同速度下的轴承故障诊断.
科学领域:
- 机械工程 机械工程
- 信号处理 信号处理
- 状态监控 状态监控
背景情况:
- 旋转机械状况监测需要在时间变化的速度下准确诊断轴承故障.
- 无触控订单跟踪 (TLOT) 是至关重要的,但当前的时间频率分析 (TFA) 方法面临着像低能量度和高复杂性这样的挑战.
- 高分辨率的时间频率表示 (TFR) 对于频率和振幅调制 (FM-AM) 强的信号是很困难的.
研究的目的:
- 开发一个改进的S高阶同步提取变换 (ISHSET),以克服当前TLOT的TFA方法的局限性.
- 为了提高旋转机械中旋转频率估计的精度和分辨率.
- 改进在时间变化的旋转速度下对轴承故障的诊断.
主要方法:
- 设计了一种新的单参数自适应窗口功能,以提高能量度和减少计算复杂性.
- 开发了一种用于高阶瞬间频率 (IF) 估计的代估计器.
- 集成了一个同步提取框架,以提高TFR分辨率和可读性.
主要成果:
- 与现有的TFA方法相比,ISHSET在模拟中显示出更高的分辨率,精度和噪声稳定性.
- 该方法有效地描述了信号的时间变化的特性.
- 实验验证证了ISHSET在估计旋转频率和提取轴承故障特征方面的有效性.
结论:
- 在旋转机械状况监控中,ISHSET为无触控的订单跟踪提供了显著的进步.
- 拟议的方法为在动态操作条件下诊断轴承故障提供了更准确和更强大的方法.
- ISHSET在涉及时间变化的旋转速度的现实应用中显示出实际优越性.
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