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Misfire Detection of Diesel Engine Based on Analysis of Cylinder Head Vibration Signal
Author(s): GAO Hong-bin, OUYANG Guang-yao
Pages: 32-
34
Year: 2005
Issue:
1
Journal: VEHICLE ENGINE
Keyword: 柴油机; 失火; 振动; 小波;
Abstract: 用小波软阈值降噪的方法提高了柴油机缸盖振动信号的信噪比.对降噪后的振动信号进行了功率谱分析,通过比较单缸断油前后功率谱的变化,找到了缸盖燃烧冲击振动的频段.以频段内振动信号的能量与总能量的比值为诊断参数,识别了柴油机的失火故障.用实测数据证明了该方法的有效性.
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