基于匹配滤波器的冲击在线检测的研究

在已知波形的条件下，匹配滤波器可以有效地提取含有较大随机干扰的冲击激励，消噪效果明显。文中针对机械动力系统中波形已知、重复产生的冲击激励，详细介绍了一种新的检测系统，并给出了在线检测算法流程。该检测系统以匹配滤波器为检测器，判决器使用了阈值算法，具有速度快、易于实现在线检测的特点。实际的例子说明了该检测系统的有效性和实用性。

Studies on Online Detection of Shock Excitation Based on Matched Filter

If the waveform is available, a signal combined with much noise can be detected properly by a matched filter (MF) with an efficient de-noising performance. In this paper, a new online detection system, which is designed to inspect the shock excitation with a known waveform is discussed. The system includes a detector based on the MF and a judge based on the threshold arithmetic. Also, the flow of an online detection application and an example are given to illustrate it clearly.