基于虚拟仪器的液压动力系统诊断信息获取实验系统开发
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摘要
结合液压系统故障诊断的特点和发展趋势,本文以信息融合的基本理论为指导思想,对液压动力系统多源诊断信息的获取、分析问题方法进行了研究,提出了基于虚拟仪器的液压动力系统多源诊断信息获取的实验内容和方法,其主要研究工作如下:
1.在课题组前期对液压动力系统信号获取及故障机理分析的研究基础上,对基于虚拟仪器的液压动力系统诊断信息获取实验系统开发的理论基础进行了分析,研究了实验系统构建的方法和硬件平台搭建的原理,在对比多种软件开发平台特性的基础上,选用LabVIEW作为实现基于虚拟仪器的液压动力系统诊断信息获取实验系统的软件平台;
2.分析了基于虚拟仪器的液压动力系统诊断信息获取系统输入输出信号,筛选压力、流量、振动及电流四种信号对液压系统、机械系统、电气系统进行监测;归纳了传感器选型的原则;论述四种信号传输与总线性能,并选择PⅪ作为基于虚拟仪器液压动力系统诊断信息获取系统的总线;提出软控制实现方法,为实验系统构建和实验系统虚拟面板开发奠定了坚实的理论基础;
3.为了能够更好研发基于虚拟仪器的液压动力系统诊断信息获取系统,探讨了实验系统构建的目的,对电磁溢流阀特性实验、液压系统变频调速实验、液压系统含气量测量实验、液压系统带负载启动状态特征信号获取实验和比例溢流阀给系统模拟加载实验的特性进行了深入的研究。分析了液压动力系统诊断信息获取实验平台的机械系统、液压系统及电气系统构成要素;
4.根据液压动力系统诊断信息获取系统虚拟面板开发的需要,对压力传感器、流量传感器、振动传感器、电流传感器的类型进行了选择;并以此为基础搭建虚拟仪器硬件平台,用LabVIEW软件平台开发了基于虚拟仪器的液压动力系统诊断信息获取实验系统。
Combined with characteristic and development trend of hydraulic system fault diagnosis as well as direction of information fusion theory,this paper studied multi-source diagnosis information hydraulic power system on information acquisition and analyzing methods.Its experimentation contents and ways based on virtual instruments are showed.Main research work are as follows:
1.According to prevent research work about electro-hydraulic acquisition signals and fault analysis mechanism of hydraulic power system previously,theory of experimental system based on virtual instruments is analyzed.And then construction methods and principles of the experimental system are studied.In contrast to characteristics of a variety of software, Lab VIEW is the best choice as the software platform for hydraulic power system diagnosis information acquisition based on virtual instrument;
2.Grounded on analysising of input and output signals of multi-source diagnosis information acquisition experiment system of Hydraulic power system,the selection of pressure,flow,vibration and current signals to monitor hydraulic systems,mechanical systems,electrical system;Discussed selection principle of the sensor and four types of signal transmission bus,at last choose PXI as the bus of electro-hydraulic multi-source diagnosis information acquisition system based on virtual instrument;Soft control method proposed for the construction of experimental systems and empoldering virtual panels.
3.In order to deeply research and develop hydraulic power system diagnosis information acquisition system,the purpose of constructing the experimental system is discussed,the characteristics of the electromagnetic relief valve,hydraulic system VVVF experiment,the hydraulic system gas measurement,hydraulic system start-up signals obtaining with load state and load simulating with the proportion relief valve experiment are all studied indepth. Analyzing construction elements of mechanical system,hydraulic system and electrical system in hydraulic power system diagnosis information acquisition platform.
4.Depended on system need of virtual panels,the types of the pressure,flow,vibration, current sensors are choosed.Afterward,hardware platform of virtual instrument is constructed. Hydraulic power system diagnosis information acquisition based on virtual instrument is successfully empoldered with Lab VIEW.
1.在课题组前期对液压动力系统信号获取及故障机理分析的研究基础上,对基于虚拟仪器的液压动力系统诊断信息获取实验系统开发的理论基础进行了分析,研究了实验系统构建的方法和硬件平台搭建的原理,在对比多种软件开发平台特性的基础上,选用LabVIEW作为实现基于虚拟仪器的液压动力系统诊断信息获取实验系统的软件平台;
2.分析了基于虚拟仪器的液压动力系统诊断信息获取系统输入输出信号,筛选压力、流量、振动及电流四种信号对液压系统、机械系统、电气系统进行监测;归纳了传感器选型的原则;论述四种信号传输与总线性能,并选择PⅪ作为基于虚拟仪器液压动力系统诊断信息获取系统的总线;提出软控制实现方法,为实验系统构建和实验系统虚拟面板开发奠定了坚实的理论基础;
3.为了能够更好研发基于虚拟仪器的液压动力系统诊断信息获取系统,探讨了实验系统构建的目的,对电磁溢流阀特性实验、液压系统变频调速实验、液压系统含气量测量实验、液压系统带负载启动状态特征信号获取实验和比例溢流阀给系统模拟加载实验的特性进行了深入的研究。分析了液压动力系统诊断信息获取实验平台的机械系统、液压系统及电气系统构成要素;
4.根据液压动力系统诊断信息获取系统虚拟面板开发的需要,对压力传感器、流量传感器、振动传感器、电流传感器的类型进行了选择;并以此为基础搭建虚拟仪器硬件平台,用LabVIEW软件平台开发了基于虚拟仪器的液压动力系统诊断信息获取实验系统。
Combined with characteristic and development trend of hydraulic system fault diagnosis as well as direction of information fusion theory,this paper studied multi-source diagnosis information hydraulic power system on information acquisition and analyzing methods.Its experimentation contents and ways based on virtual instruments are showed.Main research work are as follows:
1.According to prevent research work about electro-hydraulic acquisition signals and fault analysis mechanism of hydraulic power system previously,theory of experimental system based on virtual instruments is analyzed.And then construction methods and principles of the experimental system are studied.In contrast to characteristics of a variety of software, Lab VIEW is the best choice as the software platform for hydraulic power system diagnosis information acquisition based on virtual instrument;
2.Grounded on analysising of input and output signals of multi-source diagnosis information acquisition experiment system of Hydraulic power system,the selection of pressure,flow,vibration and current signals to monitor hydraulic systems,mechanical systems,electrical system;Discussed selection principle of the sensor and four types of signal transmission bus,at last choose PXI as the bus of electro-hydraulic multi-source diagnosis information acquisition system based on virtual instrument;Soft control method proposed for the construction of experimental systems and empoldering virtual panels.
3.In order to deeply research and develop hydraulic power system diagnosis information acquisition system,the purpose of constructing the experimental system is discussed,the characteristics of the electromagnetic relief valve,hydraulic system VVVF experiment,the hydraulic system gas measurement,hydraulic system start-up signals obtaining with load state and load simulating with the proportion relief valve experiment are all studied indepth. Analyzing construction elements of mechanical system,hydraulic system and electrical system in hydraulic power system diagnosis information acquisition platform.
4.Depended on system need of virtual panels,the types of the pressure,flow,vibration, current sensors are choosed.Afterward,hardware platform of virtual instrument is constructed. Hydraulic power system diagnosis information acquisition based on virtual instrument is successfully empoldered with Lab VIEW.
引文
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[3]S.Takayma,K.Kariya.Heuristic Learning Tool on User Interface ofVirtual Instrument[J].MEASUREMENT SCIENCE REVIEW,2003(3):56-60
[4]杨征瑞,徐铁,杨庆瑞,梁云.基于虚拟仪器技术的智能型液压元件试验台[J].液压与气动,2003,(8):34-36
[5]陈新元,戴智华,易建钢.基于虚拟控制平台的液压CAT系统研究[J].机床与液压,2002,(2):163-165.
[6]张羽.虚拟仪器的技术研究[D].南京:南京航空航天大学,2000
[7]冯一.飞机供电参数测试系统的研制[D].西安:西北工业大学,2006
[8]秦树人,张明洪,罗德扬.机械工程测试原理与技术[M].重庆:重庆大学出版社.1993:110-115
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[14]庞君.虚拟仪器技术在液压测试系统中的应用[J].机床与液压,2002,(3):171-172.
[15]黄屹,黎明柱,潘宏英.用虚拟仪表开发喷油器性能实验台[J].机电一体化,2001,(2):48-50
[16]刘晓林.基于VXI/PXI总线的虚拟仪器系统集成研究[D].西安:西北工业大学,2001
[17]National Instruments Copr.VXI bus Seminar.Austin,Texas USA[EB].January 1998.40-54
[18]关浩.基于虚拟仪器技术的液压传动CAT系统[J].组合机床与自动化加工技术,2001,(12):40-41.
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[20]陈新元,戴智华,易建钢.基于虚拟控制平台的液压CAT系统研究[J].机床与液压,2002(2):163-165
[21]庞君.虚拟仪器技术在液压测试系统中的应用[J].机床与液压,2002,(3):171-172
[22]王静,徐先懂.基于虚拟仪器的液压CAT系统设计与研究[J].凿岩机械气动工具,2003,(3):34-38
[23]关浩,孙儒通,刘安生.虚拟仪器技术在液压系统检测中的应用[J].机床与液压,2003,(3):301-302
[24]徐先懂,王静,曾晨阳.液压元件综合测试系统的设计[J].液压与气动,2004,(1):74-76
[25]王益群,王燕山,姜万录.基于虚拟仪器的电液伺服阀静动态特性测试[J].液压气动与密封,2001,(1):13-15
[26]舒怀林.PID神经元网络及其控制系统[M].北京:国防工业出版社,2006
[27]张燕霞.基于虚拟仪器的传感器虚拟实验与虚拟实验室[D],南京:南京航空航天大学,2005
[28]李丽.基于虚拟仪器技术的电气参数测量系统[D].武汉:华中科技大学,2004
[29]徐丽娜.神经网络控制[M].哈尔滨:哈尔滨工业大学出版社,1999
[30]鲍芳,冯燕.基于PCI/PXI/VXI总线的虚拟仪器测试系统[J].工业仪表与自动化装置.2000,(3):17-19
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[32]Y.J.Lee,D.H.Song,J.W.Lee,et al.An Implementation of HIA PID Controller Using Neural Network Identifier[C].Proceedings of the SICE Annual Conference,2001:331-334
[33]舒怀林.PID神经元网络及其控制系统[M].北京:国防工业出版社,2006
[34]Shu Huailin,Pi Youguo.PID neural networks for time-delay systems[C].Proceedings of 7th Inter-national Symposium on Process Systems Engineering,Elsevier House,2000,24:2-7.
[35]金志强,包启亮.一种基于LabVIEW的PID控制器设计的方法[J].微计算机信息,2005,21(6):1-2,71
[36]Goldberg,Harold.What is virtualinstrumentation[J].IEEE Instrumentatio and Measurement Magazine,2000,3(4):10-13
[37]Djurovic,L,Stankovic,L.A virtual insturment for time-frequency analysis[C].Instrumetation and Measurement,IEEE Transactions on1999,48(6):1086-1092
[38]杨秀敏,秦宏,张喜国.虚拟仪器软面板的(界面)设计[J].微处理机,2001,(4):24-26
[39]张佳佳,黄辉先,颜长春.虚拟实验平台的设计[J].现代电子技术,2004(11):4044
[40]National Instruments Corporation[EB].The Measurement and Automation Catalog 2002
[41]陆绮荣.基于虚拟仪器技术个人实验室的构建[M].北京:电子工业出版社,2006
[42]National Instruments Corporation.LabVIEW Help[J].April 2003 Edition Part Number 370117C-01
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