基于集总经验模态分解和极坐标表示的瞬时转速诊断方法

中国机械工程

基于集总经验模态分解和极坐标表示的瞬时转速诊断方法

王帅1,2;向阳1,2;王磊1,2

1.武汉理工大学能源与动力工程学院，武汉，430063
2.船舶动力系统运用技术交通行业重点实验室，武汉，430063

出版日期:2017-08-10 发布日期:2017-08-07
基金资助:
国家自然科学基金资助项目（51279148）
National Natural Science Foundation of China （No. 51279148）

Fault Diagnosis Method of Instantaneous Angular Speed Based on EEMD and Polar Representation

WANG Shuai1，2;XIANG Yang1，2;WANG Lei1，2

1.School of Energy and Power Engineering，Wuhan University of Technology,Wuhan，430063
2.Key Laboratory of Marine Power Engineering and Technology Ministry of Communications,Wuhan，430063

Online:2017-08-10 Published:2017-08-07
Supported by:
National Natural Science Foundation of China （No. 51279148）

摘要/Abstract

摘要： 为解决瞬时转速方法在诊断多缸中高速V型机发生失火故障时，存在的特征参数难以提取、诊断精度不高等问题，以发火间隔角不均匀的某V12柴油机为对象，进行了基于集总经验模态分解（EEMD）和极坐标表示的诊断方法研究。结果表明：构成本征模态函数IMF6分量的主频率为8.3Hz（0.5谐次），经过EEMD分解提取了0.5谐次成分，其幅值可作为判别单缸失火故障的特征值；将0.5谐次相位及其变化规律与极坐标表示结合，能够直观准确地定位故障。

关键词: 集总经验模态分解, 瞬时转速, 单缸失火, 极坐标表示, 故障定位

Abstract: In order to extract the time domain characteristic parameters and guarantee the diagnosis accuracy in high speed V-engine with high number of cylinders, the fault diagnosis method of IAS was studied by taking V12 diesel engine with unequal firing angel as object based on EEMD and polar representation. Results show that intrinsic mode function 6 (IMF6) has a main frequency component of 8.3Hz (0.5 harmonic order). The 0.5 harmonic order components are extracted effectively by EEMD and its amplitude may be used as an characteristic value of misfire faults. The misfire cylinder may be located accurately through the combination of polar representation, 0.5 harmonic order phases and its change rules.

Key words: ensemble empirical mode decomposition(EEMD), instantaneous angular speed(IAS), single cylinder misfire, polar representation, fault location

中图分类号:

TK428

王帅1,2;向阳1,2;王磊1,2. 基于集总经验模态分解和极坐标表示的瞬时转速诊断方法[J]. 中国机械工程.

WANG Shuai1，2;XIANG Yang1，2;WANG Lei1，2. Fault Diagnosis Method of Instantaneous Angular Speed Based on EEMD and Polar Representation[J]. China Mechanical Engineering.

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