The abnormal signal, generated by early fault, is usually weak and covered with strong noise. Therefore a high detection technique is requested.
机械系统早期故障引起的异常信号一般都很微弱，通常被淹没在很强的背景噪声中，对信号检测技术要求高。
参考来源 - 机械系统微弱故障信号检测及特征提取方法研究In order to extract the leakage current, a parallel-composed morphological filter with multiple structuring elements based on the principle of MM is designed. Also, pattern spectrum is used to analyse the early fault diagnosis of MOA.
3.基于数学形态学基本原理,构造了一种多结构元素并行复合形态滤波器以提取MOA泄漏电流,并提出了基于形态谱的MOA早期故障诊断方法。
参考来源 - 数学形态学在电力系统中的应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
This brought great difficulties to diagnose the early fault of gear.
这就为齿轮的早期故障诊断带来了很大困难。
The early fault zone was reconstructed and became dextral right - step Z - type fault during dextral - slip stage.
在右行走滑改造阶段，早期左行右阶断裂带被改造为“Z”型右行右阶断裂带。
The early fault signal is very faint, low frequency appears more to pulse, easy to be interfered by the ambient noise even submerged.
早期故障信号非常微弱，多呈现低频脉动，容易受到噪声干扰甚至被环境噪声所淹没。
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