【作者】 苏晓峰；

【导师】 林巨广；

【作者基本信息】 合肥工业大学 ， 机械电子工程， 2010， 硕士

【摘要】 汽车主减速器总成作为汽车驱动桥的核心组成部分,其性能的好坏,对驱动桥的性能以及对整车的行驶性能都会有直接的影响。分析和研究主减速器总成的性能是保障汽车质量的一个重要环节。针对汽车主减速器总成振动信号的特征分析有多种不同的方法,其中阶比分析是比较重要的一种。本文针对主减速器总成振动信号特征的分析主要手段—阶比分析技术,进行了系统而全面的研究。本文首先阐述了汽车主减速器总成测试的重要意义,对国内外故障诊断发展现状进行了分析。接着对汽车主减速器总成振动信号产生的原理以及振动信号的特征进行了详细剖析。从原理上揭示了汽车主减速器总成的振动特征以及振动信号的基本形式。其次,本文针对汽车主减速器总成振动信号的特征,进行了以阶比分析为核心的各种分析方法的详细阐述。详细介绍了各种阶比跟踪方法的原理以及基于C#编程平台的算法实现。通过对阶比分析与频谱分析的对比分析,深入阐述了阶比分析中抗混叠滤波以及降噪问题,并且将频谱分析过程中的有效方法引入到阶比分析中来,达到了快速准确提取故障特征的目的。另外针对阶比分析的不足—不能反映角度域信息的特点,提出了阶比分析和小波分析结合的“阶比—小波”分析方法。针对非定比传动系统的阶比分析方法进行了一定程度的探讨。最后,参考目前国内外汽车主减速器总成测试系统的设计方法以及总结本文所阐述的各种信号分析方法,提出了以阶比分析为核心的阶比分析系统的设计方法。通过对汽车主减速器总成生产现场测试的数据分析,表明了基于阶比分析方法的故障检测具有正确性和科学性。更多还原

【Abstract】 Main reducer is one of the most important modules of drive train. It’s capability would affect the function of axle and vehicle. To analyse the measurement method of main reducer is an improtant thing for automobile.There are lots of means for failure analysis, but order analysis algorithm is the most suitable method for main reducer fault diagnosis. So, this article focuses on this algorithm, and introduces the theory systemically.First of all, the meaning of measurement for main reducer is introduced. And the development situation of fault diagnosis is also be involved in the article. Additionaly, the vibration theory and signal features of main reducer are introduced. Here we explain the the vibration reasons and make a summary of the signal type.Subsequently, various methods of dealing with the signal of vibration which base on order analysis algorithm are arised. Every order tracking method is explaned in detail, from the theory to arithmetic. Through the comparison of power spectrum analysis and order spectrum analysis, an in-depth study about the filter method and some efficient analytical methods are done. Some important means for power spectrum analysis are brought forward to use for order spectrum analysis. Besides, a new method -“Order-Wavelet”method is advanced to supply a gap of order analysis algorithm.And, the discussion is done here about how to use order analysis for the variable transimission ratio machine.Finally, a fault diagnosis systerm for main reducer is put forword based on the arithmetics before-mentioned and some cases from home and abroad. Subsequently, a practical case that the vibration detection system is used in is introduced. And we can find out that the order analysis algorithm is a good method for main reducer fault diagnosis through the test data result.更多还原