基于电流特性的主动磁轴承电磁线圈故障诊断
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摘要
磁悬浮轴承因其优异的性能得到了广泛应用,但电磁线圈的故障可能导致转子失控,从而造成严重后果。提出一种应用于磁悬浮轴承的在线电磁线圈故障诊断方法,通过建立数字开关功放输出电流的数学模型,获取其电流输出特性,从理论上分析线圈发生故障对输出电流变化率的影响;建立两态调制下的Matlab/Simulink模型,进行了仿真验证,证明了方法的理论可行性;设计基于电流过采样的故障诊断方案以及相关算法,搭建基于数字信号处理器(digital signal processor,DSP)的数字开关功放试验平台,进行了相关线圈故障的在线检测试验,结果证明了本研究方法的有效性。
Magnetic bearings had been widely used for its excellent performance,but the fault of electromagnetic coil might cause the rotor to lose control and cause serious consequences. A on-line fault diagnosis method of electromagnetic coil formagnetic bearings was proposed through the establishment of mathematical model of digital switching power amplifier output current,the current output characteristic was obtained,and the influence of the coil fault on the output current variation rate was theoretically analyzed. A Matlab/Simulink model was established under the two state modulation,the simulation results demonstrated the theoretical feasibility of the method. A fault diagnosis scheme and related algorithm based on current oversampling was designed. Then a digital switching power amplifier test platform based on digital signal processor( DSP) was built,and the on-line detection experiment of related coil faults was carried out. The experimental results demonstrated the effectiveness of the method discussed in this paper.
Magnetic bearings had been widely used for its excellent performance,but the fault of electromagnetic coil might cause the rotor to lose control and cause serious consequences. A on-line fault diagnosis method of electromagnetic coil formagnetic bearings was proposed through the establishment of mathematical model of digital switching power amplifier output current,the current output characteristic was obtained,and the influence of the coil fault on the output current variation rate was theoretically analyzed. A Matlab/Simulink model was established under the two state modulation,the simulation results demonstrated the theoretical feasibility of the method. A fault diagnosis scheme and related algorithm based on current oversampling was designed. Then a digital switching power amplifier test platform based on digital signal processor( DSP) was built,and the on-line detection experiment of related coil faults was carried out. The experimental results demonstrated the effectiveness of the method discussed in this paper.
引文
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[15]常肖,徐龙祥,董继勇.磁悬浮轴承数字功率放大器[J].机械工程学报,2010,46(20):9-14.CHANG Xiao,XU Longxiang,DONG Jiyong.Digital power amplifier of active magnetic bearing[J].Journal of Mechanical Engineering,2010,46(20):9-14.
[16]WANG J,XU L.System model of three-level switching power amplifier for magnetic bearing[C]//International Conference on Measuring Technology and Mechatronics Automation.NewYork,USA:IEEE Computer Society,2009:708-711.
[17]臧晓敏,王晓琳,仇志坚,等.磁轴承开关功放中电流三态调制技术的研究[J].中国电机工程学报,2004,24(9):167-172.ZANG Xiaomin,WANG Xiaolin,QIU Zhijian,et al.Research on current modetri-state modulation technology in switching power amplifier for magnetic bearing[J].Proceedings of the CSEE,2004,24(9):167-172.
[18]程鑫,曾红勇,吴华春,等.磁悬浮开关功放数学模型与控制实现[J].华中科技大学学报(自然科学版),2015(增刊1):493-496.CHENG Xin,ZENG Hongyong,WU Huachun,et al.Mathematical model and control implementation of switching power amplifier in magnetical-levitated system[J].Journal of Huazhong University of Science&Technology(Natural Science Edition),2015(Suppl.1):493-496.
[19]CHENG X,WANG B,CHEN Q,et al.A unified design and the current ripple characteristic analysis of digital switching power amplifier in active magnetic-levitated bearings[J].International Journal of Applied Electromagnetics&Mechanics,2017,55(3):391-407.
[20]王军,徐龙祥.磁悬浮轴承开关功率放大器等效数学模型[J].电工技术学报,2010,25(4):54-58.WANG Jun,XU Longxiang.Equivalent mathematical model of switched power amplifier for magnetic bearings[J].Journal of electrical technology,2010,25(4):54-58.
[21]张亮,房建成.基于MATLAB的电磁轴承开关功放建模与仿真研究[J].系统仿真学报,2007,19(11):2395-2398.ZHANG Liang,FANG Jiancheng.Research on modeling and Simulation of switching power amplifier for active magnetic bearing applications based on MATLAB[J].Journal of System Simulation,2007,19(11):2395-2398.
[2]SCHWEITZER G,MASLEN E H.Magnetic bearings:theory,design,and application to rotating machinery[M].Berlin,Germany:Springer,2009.
[3]MASLEN E H,MEEKER D C.Fault tolerance of magnetic bearings by generalized bias current linearization[J].IEEE Transactions on Magnetics,1995,31(3):2304-2314.
[4]CHENG X,LIU H,SONG S,et al.Reconfiguration of tightly-coupled redundant supporting structure in active magnetic bearings under the failures of electromagnetic actuators[J].International Journal of Applied Electromagnetics&Mechanics,2017,54(3):1-12.
[5]CHENG X,CHEN Q,ZENG H,et al.Reconfiguration rules for loosely-coupled redundant supporting structure in radial magnetic bearings[J].International Journal of Applied Electromagnetics&Mechanics,2016,51(2):91-106.
[6]汲胜昌,刘味果,李彦明,等.振动法用于在线监测电力变压器绕组及铁心状况的可行性研究[J].高压电器,2001,37(5):4-7.JI Shengchang,LIU Weiguo,LI Yanming,et al.Feasibility of vibration analysis method in application to on-line monitoring of the core and the winding of power transformer[J].High Voltage Apparatus,2001,37(5):4-7.
[7]李永刚,李和明,赵华.汽轮发电机转子绕组匝间短路故障诊断新判据[J].中国电机工程学报,2003,23(6):112-116.LI Yonggang,LI Heming,ZHAO Hua.The newcriterion on interturn short-circuit fault diagnose of steam turbine generator rotor windings[J].Proceedings of the CSEE,2003,23(6):112-116.
[8]BACHSCHMID N,PENNACCHI P,VANIA A.Identification of multiple faults in rotor systems[J].Journal of Sound&Vibration,2002,254(2):327-366.
[9]CADE I S,KEOGH P S,SAHINKAYA MN.Fault identification in rotor/magnetic bearing systems using discrete time wavelet coefficients[J].IEEE/ASME Transactions on Mechatronics,2005,10(6):648-657.
[10]陈小玄,罗大庸,单勇腾.小波分析在转子绕组匝间短路故障诊断中的应用[J].电机与控制学报,2007,11(2):143-147.CHEN Xiaoxuan,LUO Dayong,SHAN Yongteng.Application of wavelet analysis on fault diagnosis of interturn short circuit in rotor winding[J].Electric Machines&Control,2007,11(2):143-147.
[11]NAGEL L,GALEAZZI R,VOIGT A J,et al.Fault diagnosis of active magnetic bearings based on Gaussian GLRT detector[C]//Proceedings of the 3rd Control and Fault-Tolerant Systems.NewYork,USA:IEEE,2016:540-547.
[12]DOHNAL F,SEKHAR A S.Current signature analysis for unbalance fault detection in a rotor supported by active magnetic bearings[J].International Journal of Condition Monitoring,2014,4(1):2-8(7).
[13]TSAI N C,KING Y H,LEE R M.Fault diagnosis for magnetic bearing systems[J].Mechanical Systems&Signal Processing,2009,23(4):1339-1351.
[14]LOESCH F.Detection and correction of actuator and sensor faults in active magnetic bearing system[C]//Proceedings of the 8th International Symposium on Magnetic Bearing.Zurich,Switzerland:vdf Hochschulverlag AG an der ETH Zurich,2002:113-118.
[15]常肖,徐龙祥,董继勇.磁悬浮轴承数字功率放大器[J].机械工程学报,2010,46(20):9-14.CHANG Xiao,XU Longxiang,DONG Jiyong.Digital power amplifier of active magnetic bearing[J].Journal of Mechanical Engineering,2010,46(20):9-14.
[16]WANG J,XU L.System model of three-level switching power amplifier for magnetic bearing[C]//International Conference on Measuring Technology and Mechatronics Automation.NewYork,USA:IEEE Computer Society,2009:708-711.
[17]臧晓敏,王晓琳,仇志坚,等.磁轴承开关功放中电流三态调制技术的研究[J].中国电机工程学报,2004,24(9):167-172.ZANG Xiaomin,WANG Xiaolin,QIU Zhijian,et al.Research on current modetri-state modulation technology in switching power amplifier for magnetic bearing[J].Proceedings of the CSEE,2004,24(9):167-172.
[18]程鑫,曾红勇,吴华春,等.磁悬浮开关功放数学模型与控制实现[J].华中科技大学学报(自然科学版),2015(增刊1):493-496.CHENG Xin,ZENG Hongyong,WU Huachun,et al.Mathematical model and control implementation of switching power amplifier in magnetical-levitated system[J].Journal of Huazhong University of Science&Technology(Natural Science Edition),2015(Suppl.1):493-496.
[19]CHENG X,WANG B,CHEN Q,et al.A unified design and the current ripple characteristic analysis of digital switching power amplifier in active magnetic-levitated bearings[J].International Journal of Applied Electromagnetics&Mechanics,2017,55(3):391-407.
[20]王军,徐龙祥.磁悬浮轴承开关功率放大器等效数学模型[J].电工技术学报,2010,25(4):54-58.WANG Jun,XU Longxiang.Equivalent mathematical model of switched power amplifier for magnetic bearings[J].Journal of electrical technology,2010,25(4):54-58.
[21]张亮,房建成.基于MATLAB的电磁轴承开关功放建模与仿真研究[J].系统仿真学报,2007,19(11):2395-2398.ZHANG Liang,FANG Jiancheng.Research on modeling and Simulation of switching power amplifier for active magnetic bearing applications based on MATLAB[J].Journal of System Simulation,2007,19(11):2395-2398.