柴油机润滑系统多故障耦合关系分析及解耦技术  

Multi-fault coupling analysis and decoupling approach for diesel engine lubrication system

作　　者：王金鑫 王忠巍[2] 马修真[2] 张驰[2] WANG Jinxin;WANG Zhongwei;MA Xiuzhen;ZHANG Chi(School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;College of Power and Energy, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2021年第6期825-832,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51305089);黑龙江省自然科学基金项目(E2016018).

摘　　要：针对柴油机润滑系统多故障耦合性强、故障定位难的问题,本文提出一种柴油机润滑系统多故障关联性分析及解耦方法。该方法采用键合图理论,建立柴油机润滑系统动力学模型,将其转化为时间因果图模型,基于该模型分析柴油机润滑系统热力参数在不同故障下的响应特性,获得多故障在异常征兆上的耦合关系。在此基础上,将集合论的思想引入柴油机润滑系统多故障解耦研究中,通过分析异常征兆对润滑系统多故障的划分作用,去除多故障间的关联特征信息,降低润滑系统多故障间的耦合度,为实施柴油机润滑系统多故障的分离与诊断提供依据。利用某柴油机润滑系统的经典GT-Power模型,验证了润滑系统多故障解耦研究的有效性。Due to the strong coupling relationships among multiple faults of diesel engine lubrication system,it is considerably difficult to identify the root of fault.To solve this problem,this paper proposes a multi-fault relevance analysis and decoupling approach for diesel engine lubrication system.First,the dynamics model of the diesel engine lubrication system is established based on bond graph,and it is further transferred into temporal causal graph model.In this model,the response characteristics of thermal parameters of diesel engine′s lubrication system under different faults can be determined accordingly,and the coupling relation of multiple faults on abnormal symptoms is obtained.On this basis,the set theory is introduced into the decoupling research of multiple faults of diesel engine′s lubrication system.By analyzing the faults partition action of abnormal symptoms,the correlative features of multiple faults are eliminated.The coupling degree of multiple faults decreases using the proposed approach,providing a basis for the isolation of multiple faults of an engine lubrication system.The approach is verified using a classical GT-Power model of a diesel engine lubrication system.

关 键 词：柴油机 润滑系统 故障诊断 多故障解耦 键合图 时间因果图 集合论 特征降维 

分 类 号：TK428[动力工程及工程热物理—动力机械及工程]