分形几何在内燃机振动信号分析中的应用  

APPLICATION OF FRACTAL GEOMETRY TO ANALYSIS OF VIBRATION SIGNAL OF I.C.ENGINES

作　　者：夏勇 商斌梁 张振仁 薛模根 郭明芳 

机构地区：[1]二炮工程学院研究生二队,西安710025

出　　处：《振动与冲击》2001年第1期59-61,共3页Journal of Vibration and Shock

摘　　要：本文将分形几何引入内燃机振动信号的分析之中 ,用分维数描述振动信号的复杂程度。对缸盖振动信号的谱分析表明 ,可以用分维数描述缸盖振动信号。当气门发生故障时 ,分维数将较正常时小 ,由此可判断气门状态正常与否及故障类型。In the paper fractal geometry is introduced to analyze the vibration signal of I.C. engines. Fractal dimension is applied to describe the complex degree of the vibration signal. The results show that with spectral analysis of the cylinder head vibration signal, the fractal dimension can feature the vibration signal very well. The fractal dimension will be smaller when the valve is in fault condition and the fault type can be identified accordingly.

关 键 词：内燃机 分形几何 分维数 振动信号分析 故障诊断 气阈结构 

分 类 号：TK407[动力工程及工程热物理—动力机械及工程] O189[理学—数学]