欢迎访问《兵工学报》官方网站,今天是 分享到:

兵工学报 ›› 2013, Vol. 34 ›› Issue (5): 519-526.doi: 10. 3969/ j. issn. 1000-1093. 2013. 05. 002

• 研究论文 • 上一篇    下一篇

基于自适应平行因子的柴油机喷油故障诊断研究

孙宜权1, 王滨2, 张英堂1, 李志宁1, 张光1   

  1. 1. 军械工程学院, 河北石家庄050003; 2. 中国兵器工业导航与控制技术研究所, 北京100089
  • 上线日期:2013-07-22
  • 通讯作者: 孙宜权 E-mail:syq2stone@163. com
  • 作者简介:孙宜权(1981—), 男, 博士研究生。

Study of Fault Diagnosis of Diesel Engine Fuel Injection Based on Adaptive Parallel Factor

SUN Yi-quan1, WANG Bin2, ZHANG Ying-tang1, LI Zhi-ning1, ZHANG Guang1   

  1. 1. Ordnance Engineering College, Shijiazhuang 050003, Hebei, China; 2. China Weapon Industry Navigation and Control Technology Research Institute, Beijing 100089, China
  • Online:2013-07-22
  • Contact: SUN Yi-quan E-mail:syq2stone@163. com

摘要:

为了解决柴油机发生喷油故障时喷油器受扰动引起的弹性压缩脉冲发生变化,缸盖受激产生的振动也随之变化的问题,提出了一种通过测量柴油机缸盖振动信号间接诊断喷油故障的方法。首先以5 kHz 为截止频率对振动观测信号进行高通滤波,减弱燃爆振动信号的干扰。然后利用等角度重采样的方法,将信号从时域变换到角域,消除转速波动对信号处理的影响。由于滤波后振动观测信号受其他非白噪声的干扰,最后利用自适应平行因子(PARAFAC)方法对振动观测信号进行盲源分离,减弱非白噪声的影响。以压缩上止点附近缸盖振动信号的能量作为特征量,对柴油机喷油故障进行诊断,应用研究表明,该方法有效地诊断出了柴油机喷油故障。

关键词: 动力机械工程, 柴油机喷油故障, 等角度重采样, 自适应平行因子

Abstract:

To solve the change of elastic ally compressed pulse disturbed by fuel injector and the vibration of cylinder head when the fuel injection fault of diesel engine happens, a method for diagnosing fuel in- jection fault by measuring the vibration of the diesel engine cylinder head is presented. Firstly, the high pass filtering method is used to reduce the combustion vibration signal interference under the cut off fre- quency of 5 kHz. Then, by using the constant angle resamples, the signal is transferred from time domain to angle domain to eliminate the effect of speed fluctuation on signal processing. Finally, since the fil- tered signal is disturbed by other non-white noise, the method of PARAFAC is applied to separate signals to reduce the influence of non-white noise. The fuel injection fault of diesel engine is diagnosed by taking the energy of cylinder head vibration nearby top dead center as feature value. The result shows that this method could be used to diagnose the fuel injection fault of diesel engine effectively.

Key words: power machinery engineering, fuel injection fault of diesel engine, constant angle resample, adaptive parallel factor

中图分类号: