形态差值滤波及形态指数在液压泵滑靴磨损状态评估中的应用  

Application of morphological difference filter and morphological index to wear condition assessment of hydraulic pump slipper

作　　者：郑直[1,2] 姜万录[1,2] 朱勇[1,2] 胡浩松[1,2] 

机构地区：[1]燕山大学河北省重型机械流体动力传输与控制重点实验室,秦皇岛066004 [2]燕山大学先进锻压成形技术与科学教育部重点实验室,秦皇岛066004

出　　处：《振动与冲击》2015年第12期13-17,41,共6页Journal of Vibration and Shock

基　　金：国家重点基础研究发展计划(973计划)资助项目(2014CB046405);国家自然科学基金资助项目(51475405;51075349);河北省自然科学基金资助项目(E2013203161)

摘　　要：针对液压泵滑靴磨损状态的评估问题,提出了一种基于形态差值滤波和形态指数(MI)的方法来有效地诊断滑靴磨损故障并评估其劣化程度。首先,利用形态差值滤波器对现场实测的正常状态和四种不同磨损程度的滑靴故障的振动信号进行滤波处理,提取出清晰的特征信息;其次,对滤波后的振动信号进行有量纲参数和无量纲参数的提取,其中有量纲参数包括首次引入到液压泵健康状态评估领域的MI;最后,通过分析MI对滑靴磨损故障及其劣化程度的敏感性和变化规律,得出MI可以有效地诊断出滑靴磨损故障及评估其劣化程度。Aiming at the wear condition assessment of hydraulic pump slipper,a new method for effectively diagnosing slipper wear fault and assessing its deterioration degree was proposed,based on morphological difference filter and morphological index （MI）.The normal vibration signal and the vibration signals under slipper wear fault of four deterioration degrees were filtered by morphological difference filter to get clear feature informations.Some dimensional parameters,including the MI,and dimensionless parameters were extracted from the filtered signals.By analyzing the sensitivity of MI to slipper wear fault and its deterioration degree,the wear condition was successfully assessed.It is concluded that the MI,firstly introduced in the field of hydraulic pump health condition assessment,can effectively diagnose the fault of slipper wear and assess its deterioration degree.

关 键 词：滑靴磨损 形态指数 形态差值滤波 液压泵 状态评估 

分 类 号：TH137[机械工程—机械制造及自动化] TP277[自动化与计算机技术—检测技术与自动化装置]